obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

11 files changed, 2509 insertions, 0 deletions

diff --git a/libjava/classpath/javax/imageio/spi/IIORegistry.java b/libjava/classpath/javax/imageio/spi/IIORegistry.java
new file mode 100644
index 000000000..faa571d60
--- /dev/null
+++ b/libjava/classpath/javax/imageio/spi/IIORegistry.java
@@ -0,0 +1,119 @@
+/* IIORegistry.java --
+   Copyright (C) 2004  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+import gnu.classpath.ServiceFactory;
+
+import java.awt.Toolkit;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+
+import gnu.java.awt.ClasspathToolkit;
+import gnu.javax.imageio.bmp.BMPImageReaderSpi;
+import gnu.javax.imageio.bmp.BMPImageWriterSpi;
+import gnu.javax.imageio.gif.GIFImageReaderSpi;
+import gnu.javax.imageio.png.PNGImageReaderSpi;
+
+public final class IIORegistry extends ServiceRegistry
+{
+  private static final HashSet defaultCategories = new HashSet();
+
+  private static HashMap instances = new HashMap();
+
+  static
+  {
+    defaultCategories.add(ImageReaderSpi.class);
+    defaultCategories.add(ImageWriterSpi.class);
+    defaultCategories.add(ImageTranscoderSpi.class);
+    defaultCategories.add(ImageInputStreamSpi.class);
+    defaultCategories.add(ImageOutputStreamSpi.class);
+  }
+
+  public static synchronized IIORegistry getDefaultInstance()
+  {
+    // XXX: This leaks memory if a ThreadGroup isn't available anymore.
+    ThreadGroup group = Thread.currentThread().getThreadGroup();
+    IIORegistry registry = (IIORegistry) instances.get(group);
+
+    if (registry == null)
+      {
+        registry = new IIORegistry();
+        instances.put(group, registry);
+      }
+
+    return registry;
+  }
+
+  private IIORegistry()
+  {
+    super(defaultCategories.iterator());
+
+    // XXX: Register built-in Spis here.
+    registerServiceProvider(new PNGImageReaderSpi()); // Register PNG decoder.
+    registerServiceProvider(new GIFImageReaderSpi()); // Register GIF decoder.
+    registerServiceProvider(new BMPImageReaderSpi());
+    registerServiceProvider(new BMPImageWriterSpi());
+
+    Toolkit toolkit = Toolkit.getDefaultToolkit();
+    if (toolkit instanceof ClasspathToolkit)
+      ((ClasspathToolkit)toolkit).registerImageIOSpis(this);
+
+    registerApplicationClasspathSpis();
+  }
+
+  /**
+   * Registers all available service providers found on the application
+   * classpath.
+   */
+  public void registerApplicationClasspathSpis()
+  {
+    ClassLoader loader = Thread.currentThread().getContextClassLoader();
+    Iterator categories = getCategories();
+
+    while (categories.hasNext())
+      {
+        Class category = (Class) categories.next();
+        Iterator providers = ServiceFactory.lookupProviders(category, loader);
+
+        while (providers.hasNext())
+          registerServiceProvider((IIOServiceProvider) providers.next());
+      }
+  }
+}
diff --git a/libjava/classpath/javax/imageio/spi/IIOServiceProvider.java b/libjava/classpath/javax/imageio/spi/IIOServiceProvider.java
new file mode 100644
index 000000000..48fa7d414
--- /dev/null
+++ b/libjava/classpath/javax/imageio/spi/IIOServiceProvider.java
@@ -0,0 +1,163 @@
+/* IIOServiceProvider.java -- General service provider for image I/O.
+   Copyright (C) 2004, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+import java.util.Locale;
+
+
+/**
+ * An abstract superclass for service providers that perform image I/O.
+ *
+ * @since 1.4
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public abstract class IIOServiceProvider
+  implements RegisterableService
+{
+  /**
+   * The vendor of this service provider, or <code>null</code> if the
+   * subclass constructor did not set this field.
+   *
+   * @see #getVendorName()
+   */
+  protected String vendorName;
+
+
+  /**
+   * The version of this service provider, or <code>null</code> if the
+   * subclass constructor did not set this field.
+   *
+   * @see #getVersion()
+   */
+  protected String version;
+
+
+  /**
+   * Constructs a general <code>IIOServiceProvider</code>, given the
+   * vendor name and a version string.
+   *
+   * @throws IllegalArgumentException if <code>vendorName</code>
+   * or <code>version</code> is <code>null</code>.
+   */
+  public IIOServiceProvider(String vendorName, String version)
+  {
+    if (vendorName == null || version == null)
+      throw new IllegalArgumentException();
+
+    this.vendorName = vendorName;
+    this.version = version;
+  }
+
+
+  /**
+   * Constructs a general <code>IIOServiceProvider</code> without
+   * specifying a vendor name and a version string. The subclass
+   * constructor should set the {@link #vendorName} and {@link
+   * #version} to non-null values.
+   */
+  public IIOServiceProvider()
+  {
+  }
+
+
+  /**
+   * Informs this service provider that it has been registered in a
+   * {@link ServiceRegistry}. If this provider gets registered as an
+   * implementor for several service categories, its
+   * <code>onRegistration</code> method will be called multiple times.
+   * The default implementation does nothing.
+   *
+   * @param registry the registry to which this service provider has
+   * been added.
+   *
+   * @param category the service category for which this provider has
+   * been registered as an implementor.
+   */
+  public void onRegistration(ServiceRegistry registry, Class<?> category)
+  {
+  }
+
+
+  /**
+   * Informs this service provider that it has been de-registered from
+   * a {@link ServiceRegistry}. If this provider had been registered
+   * as an implementor for several service categories, its
+   * <code>onDeregistration</code> method will be called multiple
+   * times. The default implementation does nothing.
+   *
+   * @param registry the registry from which this service provider has
+   * been removed.
+   *
+   * @param category the service category for which this provider has
+   * been registered as an implementor.
+   */
+  public void onDeregistration(ServiceRegistry registry, Class<?> category)
+  {
+  }
+
+
+  /**
+   * Returns the name of the vendor of this service provider.
+   */
+  public String getVendorName()
+  {
+    return vendorName;
+  }
+
+
+  /**
+   * Returns an identifier string for the version of this service
+   * provider.
+   */
+  public String getVersion()
+  {
+    return version;
+  }
+
+
+  /**
+   * Returns a short description of this service provider that can be
+   * presented to a human user.
+   *
+   * @param locale the locale for which the description string should
+   * be localized.
+   */
+  public abstract String getDescription(Locale locale);
+}
diff --git a/libjava/classpath/javax/imageio/spi/ImageInputStreamSpi.java b/libjava/classpath/javax/imageio/spi/ImageInputStreamSpi.java
new file mode 100644
index 000000000..2b60868a5
--- /dev/null
+++ b/libjava/classpath/javax/imageio/spi/ImageInputStreamSpi.java
@@ -0,0 +1,144 @@
+/* ImageInputStreamSpi.java -- Service provider for image input streams.
+   Copyright (C) 2004, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+import java.io.File;
+import java.io.IOException;
+
+import javax.imageio.stream.ImageInputStream;
+
+/**
+ * An abstract superclass for service providers that create
+ * {@linkplain javax.imageio.stream.ImageInputStream image input
+ * streams} for a file, URL, byte array or any other source.
+ *
+ * @since 1.4
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public abstract class ImageInputStreamSpi
+  extends IIOServiceProvider
+{
+  /**
+   * Indicates which kind of input is processable by the streams
+   * created by {@link #createInputStreamInstance(Object)}.
+   */
+  protected Class<?> inputClass;
+
+
+  /**
+   * Constructs a service provider for image input streams, given no
+   * parameters. It is up to the sub-class to set {@link #vendorName},
+   * {@link #version} and {@link #inputClass} to non-null values.
+   */
+  protected ImageInputStreamSpi()
+  {
+  }
+
+
+  /**
+   * Constructs a service provider for image input streams, given the
+   * vendor name and a version string.
+   *
+   * @throws IllegalArgumentException if <code>vendorName</code>
+   * or <code>version</code> is <code>null</code>.
+   */
+  public ImageInputStreamSpi(String vendorName, String version,
+                             Class<?> inputClass)
+  {
+    super(vendorName, version);
+    this.inputClass = inputClass;
+  }
+
+
+  /**
+   * Determines which kind of input is processable by the streams
+   * created by {@link #createInputStreamInstance(Object)}.
+   */
+  public Class<?> getInputClass()
+  {
+    return inputClass;
+  }
+
+
+  /**
+   * Determines whether <code>ImageInputStreams</code> created
+   * by this service provider benefit from using a cache file.
+   *
+   * <p>The default behavior is to return <code>false</code>.
+   *
+   * @return <code>true</code> if the created streams are faster or
+   * need less memory when a cache file is being used;
+   * <code>false</code> if no positive effect results from the cache
+   * file.
+   */
+  public boolean canUseCacheFile()
+  {
+    return false;
+  }
+
+
+  /**
+   * Determines whether <code>ImageInputStreams</code> created
+   * by this service provider require the use of a cache file.
+   *
+   * <p>The default behavior is to return <code>false</code>.
+   *
+   * @return <code>true</code> if the created streams can only work
+   * when a cache file is being used; <code>false</code> if no cache
+   * file is needed.
+   */
+  public boolean needsCacheFile()
+  {
+    return false;
+  }
+
+
+  public abstract ImageInputStream createInputStreamInstance(Object input,
+                                                             boolean useCache,
+                                                             File cacheDir)
+    throws IOException;
+
+
+  public ImageInputStream createInputStreamInstance(Object input)
+    throws IOException
+  {
+    return createInputStreamInstance(input, canUseCacheFile(), null);
+  }
+}
diff --git a/libjava/classpath/javax/imageio/spi/ImageOutputStreamSpi.java b/libjava/classpath/javax/imageio/spi/ImageOutputStreamSpi.java
new file mode 100644
index 000000000..872e7181e
--- /dev/null
+++ b/libjava/classpath/javax/imageio/spi/ImageOutputStreamSpi.java
@@ -0,0 +1,143 @@
+/* ImageOutputStreamSpi.java -- Service provider for image output streams.
+   Copyright (C) 2004, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+import java.io.File;
+import java.io.IOException;
+
+import javax.imageio.stream.ImageOutputStream;
+
+/**
+ * An abstract superclass for service providers that create
+ * {@linkplain javax.imageio.stream.ImageOutputStream image output
+ * streams} for a file, URL, byte array or any other target.
+ *
+ * @since 1.4
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public abstract class ImageOutputStreamSpi
+  extends IIOServiceProvider
+{
+  /**
+   * Indicates which kind of output is produced by the streams
+   * created by {@link #createOutputStreamInstance(Object)}.
+   */
+  protected Class<?> outputClass;
+
+
+  /**
+   * Constructs a service provider for image output streams, given no
+   * parameters. It is up to the sub-class to set {@link #vendorName},
+   * {@link #version} and {@link #outputClass} to non-null values.
+   */
+  protected ImageOutputStreamSpi()
+  {
+  }
+
+
+  /**
+   * Constructs a service provider for image output streams, given the
+   * vendor name, a version string and the kind of producable output.
+   *
+   * @throws IllegalArgumentException if <code>vendorName</code>
+   * or <code>version</code> is <code>null</code>.
+   */
+  public ImageOutputStreamSpi(String vendorName, String version,
+                              Class<?> outputClass)
+  {
+    super(vendorName, version);
+    this.outputClass = outputClass;
+  }
+
+
+  /**
+   * Determines which kind of output is produced by the streams
+   * created by {@link #createOutputStreamInstance(Object)}.
+   */
+  public Class<?> getOutputClass()
+  {
+    return outputClass;
+  }
+
+
+  /**
+   * Determines whether <code>ImageOutputStreams</code> created
+   * by this service provider benefit from using a cache file.
+   *
+   * <p>The default behavior is to return <code>false</code>.
+   *
+   * @return <code>true</code> if the created streams are faster or
+   * need less memory when a cache file is being used;
+   * <code>false</code> if no positive effect results from the cache
+   * file.
+   */
+  public boolean canUseCacheFile()
+  {
+    return false;
+  }
+
+
+  /**
+   * Determines whether <code>ImageOutputStreams</code> created
+   * by this service provider require the use of a cache file.
+   *
+   * <p>The default behavior is to return <code>false</code>.
+   *
+   * @return <code>true</code> if the created streams can only work
+   * when a cache file is being used; <code>false</code> if no cache
+   * file is needed.
+   */
+  public boolean needsCacheFile()
+  {
+    return false;
+  }
+
+
+  public abstract ImageOutputStream createOutputStreamInstance(
+    Object output, boolean useCache, File cacheDir)
+    throws IOException;
+
+
+  public ImageOutputStream createOutputStreamInstance(Object output)
+    throws IOException
+  {
+    return createOutputStreamInstance(output, canUseCacheFile(), null);
+  }
+}
diff --git a/libjava/classpath/javax/imageio/spi/ImageReaderSpi.java b/libjava/classpath/javax/imageio/spi/ImageReaderSpi.java
new file mode 100644
index 000000000..3ffa93a0b
--- /dev/null
+++ b/libjava/classpath/javax/imageio/spi/ImageReaderSpi.java
@@ -0,0 +1,121 @@
+/* ImageReaderSpi.java --
+   Copyright (C) 2004  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+import java.io.IOException;
+
+import javax.imageio.ImageReader;
+import javax.imageio.stream.ImageInputStream;
+
+/**
+ * @author Michael Koch (konqueror@gmx.de)
+ */
+public abstract class ImageReaderSpi extends ImageReaderWriterSpi
+{
+  public static final Class[] STANDARD_INPUT_TYPE =
+    { ImageInputStream.class };
+
+  protected Class[] inputTypes;
+  protected String[] writerSpiNames;
+
+  protected ImageReaderSpi()
+  {
+    // Do nothing here.
+  }
+
+  public ImageReaderSpi(String vendorName, String version, String[] names,
+                        String[] suffixes, String[] MIMETypes,
+                        String readerClassName, Class[] inputTypes,
+                        String[] writerSpiNames,
+                        boolean supportsStandardStreamMetadataFormat,
+                        String nativeStreamMetadataFormatName,
+                        String nativeStreamMetadataFormatClassName,
+                        String[] extraStreamMetadataFormatNames,
+                        String[] extraStreamMetadataFormatClassNames,
+                        boolean supportsStandardImageMetadataFormat,
+                        String nativeImageMetadataFormatName,
+                        String nativeImageMetadataFormatClassName,
+                        String[] extraImageMetadataFormatNames,
+                        String[] extraImageMetadataFormatClassNames)
+  {
+    super(vendorName, version, names, suffixes, MIMETypes, readerClassName,
+          supportsStandardStreamMetadataFormat, nativeStreamMetadataFormatName,
+          nativeStreamMetadataFormatClassName, extraStreamMetadataFormatNames,
+          extraStreamMetadataFormatClassNames, supportsStandardImageMetadataFormat,
+          nativeImageMetadataFormatName, nativeImageMetadataFormatClassName,
+          extraImageMetadataFormatNames, extraImageMetadataFormatClassNames);
+
+    if (inputTypes == null
+        || inputTypes.length == 0)
+      throw new IllegalArgumentException("inputTypes may not be null or empty");
+
+    this.inputTypes = inputTypes;
+    this.writerSpiNames = writerSpiNames;
+  }
+
+  public abstract boolean canDecodeInput(Object source)
+    throws IOException;
+
+  public ImageReader createReaderInstance()
+    throws IOException
+  {
+    return createReaderInstance(null);
+  }
+
+  public abstract ImageReader createReaderInstance(Object extension)
+    throws IOException;
+
+  public String[] getImageWriterSpiNames()
+  {
+    return writerSpiNames;
+  }
+
+  public Class[] getInputTypes()
+  {
+    return inputTypes;
+  }
+
+  public boolean isOwnReader(ImageReader reader)
+  {
+    if (reader == null)
+      throw new IllegalArgumentException("reader may not be null");
+
+    return pluginClassName.equals(reader.getClass().getName());
+  }
+}
diff --git a/libjava/classpath/javax/imageio/spi/ImageReaderWriterSpi.java b/libjava/classpath/javax/imageio/spi/ImageReaderWriterSpi.java
new file mode 100644
index 000000000..40d44e3d0
--- /dev/null
+++ b/libjava/classpath/javax/imageio/spi/ImageReaderWriterSpi.java
@@ -0,0 +1,511 @@
+/* ImageReaderWriterSpi.java -- Superclass for image reader and writer spis.
+   Copyright (C) 2004, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+import javax.imageio.metadata.IIOMetadataFormat;
+import javax.imageio.metadata.IIOMetadataFormatImpl;
+
+/**
+ * An abstract superclass that contains the common parts of {@link
+ * javax.imageio.spi.ImageReaderSpi} and {@link
+ * javax.imageio.spi.ImageWriterSpi}.
+ *
+ * @since 1.4
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public abstract class ImageReaderWriterSpi
+  extends IIOServiceProvider
+{
+  /**
+   * The human-readable, localized names of the supported image
+   * formats. This value should be non-<code>null</code> after
+   * construction.
+   *
+   * @see #getFormatNames()
+   */
+  protected String[] names;
+
+
+  /**
+   * The file suffixes of the supported image formats. This value
+   * should be non-<code>null</code> after construction.
+   *
+   * @see #getFileSuffixes()
+   */
+  protected String[] suffixes;
+
+
+  /**
+   * The MIME types of the supported image formats.  This value
+   * should be non-<code>null</code> after construction.
+   *
+   * @see #getMIMETypes()
+   */
+  protected String[] MIMETypes;
+
+
+  /**
+   * The fully qualified name of the class that implements the {@link
+   * javax.imageio.ImageReader} or {@link javax.imageio.ImageWriter}
+   * interface.  This value should be non-<code>null</code> after
+   * construction.
+   *
+   * @see #getPluginClassName()
+   */
+  protected String pluginClassName;
+
+
+  /**
+   * Indicates whether the per-stream {@linkplain
+   * javax.imageio.metadata.IIOMetadata metadata objects} associated
+   * with this plug-in support format
+   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
+   * <code>getAsTree</code> and <code>setAsTree</code> methods.
+   *
+   * @see #isStandardStreamMetadataFormatSupported()
+   */
+  protected boolean supportsStandardStreamMetadataFormat;
+
+
+  /**
+   * The name of the format that allows encoding all stream metadata
+   * without loss, or <code>null</code> if this plug-in does not
+   * provide a format that preserves all stream metadata.
+   */
+  protected String nativeStreamMetadataFormatName;
+
+  protected String nativeStreamMetadataFormatClassName;
+
+
+  /**
+   * The names of additional formats for encoding stream metadata,
+   * other than the {@linkplain
+   * #isStandardStreamMetadataFormatSupported() standard} and the
+   * {@linkplain #getNativeStreamMetadataFormatName() native} formats,
+   * or <code>null</code> if this plug-in does not provide any extra
+   * formats.
+   */
+  protected String[] extraStreamMetadataFormatNames;
+
+
+  protected String[] extraStreamMetadataFormatClassNames;
+
+
+  /**
+   * Indicates whether the per-image {@linkplain
+   * javax.imageio.metadata.IIOMetadata metadata objects} associated
+   * with this plug-in support format
+   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
+   * <code>getAsTree</code> and <code>setAsTree</code> methods.
+   *
+   * @see #isStandardImageMetadataFormatSupported()
+   */
+  protected boolean supportsStandardImageMetadataFormat;
+
+
+  /**
+   * The name of the format that allows encoding all image metadata
+   * without loss, or <code>null</code> if this plug-in does not
+   * provide a format that preserves all image metadata.
+   */
+  protected String nativeImageMetadataFormatName;
+
+  protected String nativeImageMetadataFormatClassName;
+
+
+  /**
+   * The names of additional formats for encoding image metadata,
+   * other than the {@linkplain
+   * #isStandardImageMetadataFormatSupported() standard} and the
+   * {@linkplain #getNativeImageMetadataFormatName() native} formats,
+   * or <code>null</code> if this plug-in does not provide any extra
+   * formats.
+   */
+  protected String[] extraImageMetadataFormatNames;
+
+
+  protected String[] extraImageMetadataFormatClassNames;
+
+
+  /**
+   * Constructs an <code>ImageReaderWriteSpi</code> instance, without
+   * specifying a number of parameters. Constructors of concrete
+   * subclasses must ensure that they set all inherited fields to
+   * meaningful values.
+   */
+  public ImageReaderWriterSpi()
+  {
+  }
+
+
+  /**
+   * Constructs an <code>ImageReaderWriteSpi</code> instance,
+   * specifying a number of parameters.
+   *
+   * @param names the human-readable, localized names of the supported
+   * image formats, for example <code>[&#x201c;Tagged Image File
+   * Format&#x201d;, &#x201c;Portable Network
+   * Graphics&#x201d;]</code>.
+   *
+   * @param suffixes the file suffixes of the supported image formats,
+   * for example <code>[&#x201c;tiff&#x201d;, &#x201c;tif&#x201d;,
+   * &#x201c;png&#x201d;]</code>.
+   *
+   * @param MIMETypes the MIME types of the supported image formats,
+   * for example <code>[&#x201c;image/tiff&#x201d;,
+   * &#x201c;image/png&#x201d;]</code>.
+   *
+   * @param pluginClassName the fully qualified name of the class that
+   * implements the {@link javax.imageio.ImageReader} or {@link
+   * javax.imageio.ImageWriter} interface.
+   *
+   * @param supportsStandardStreamMetadataFormat whether the
+   * per-stream {@linkplain javax.imageio.metadata.IIOMetadata
+   * metadata objects} associated with this plug-in support format
+   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
+   * <code>getAsTree</code> and <code>setAsTree</code> methods.
+   *
+   * @param nativeStreamMetadataFormatName the name of the format that
+   * allows encoding all stream metadata without loss, or
+   * <code>null</code> if this plug-in does not provide a format that
+   * preserves all stream metadata.
+   *
+   * @param extraStreamMetadataFormatNames the names of additional
+   * formats for encoding stream metadata, other than the {@linkplain
+   * #isStandardStreamMetadataFormatSupported() standard} and the
+   * {@linkplain #getNativeStreamMetadataFormatName() native} formats,
+   * or <code>null</code> if this plug-in does not provide any extra
+   * formats.
+   *
+   * @param supportsStandardImageMetadataFormat whether the per-image
+   * {@linkplain javax.imageio.metadata.IIOMetadata metadata objects}
+   * associated with this plug-in support format
+   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
+   * <code>getAsTree</code> and <code>setAsTree</code> methods.
+   *
+   * @param nativeImageMetadataFormatName the name of the format that
+   * allows encoding all image metadata without loss, or
+   * <code>null</code> if this plug-in does not provide a format that
+   * preserves all image metadata.
+   *
+   * @param extraImageMetadataFormatNames the names of additional
+   * formats for encoding image metadata, other than the {@linkplain
+   * #isStandardImageMetadataFormatSupported() standard} and the
+   * {@linkplain #getNativeImageMetadataFormatName() native} formats,
+   * or <code>null</code> if this plug-in does not provide any extra
+   * formats.
+   *
+   * @throws IllegalArgumentException if <code>vendorName</code>
+   * or <code>version</code> is <code>null</code>.
+   */
+  public ImageReaderWriterSpi(String vendorName, String version,
+                              String[] names, String[] suffixes,
+                              String[] MIMETypes, String pluginClassName,
+                              boolean supportsStandardStreamMetadataFormat,
+                              String nativeStreamMetadataFormatName,
+                              String nativeStreamMetadataFormatClassName,
+                              String[] extraStreamMetadataFormatNames,
+                              String[] extraStreamMetadataFormatClassNames,
+                              boolean supportsStandardImageMetadataFormat,
+                              String nativeImageMetadataFormatName,
+                              String nativeImageMetadataFormatClassName,
+                              String[] extraImageMetadataFormatNames,
+                              String[] extraImageMetadataFormatClassNames)
+  {
+    /* The inherited constructor will throw IllegalArgumentException
+     * if one of its arguments is null.
+     */
+    super(vendorName, version);
+
+    if (names == null || names.length == 0 || pluginClassName == null)
+      throw new IllegalArgumentException();
+
+    this.names = names;
+    this.suffixes = suffixes;
+    this.MIMETypes = MIMETypes;
+    this.pluginClassName = pluginClassName;
+
+    this.supportsStandardStreamMetadataFormat
+      = supportsStandardStreamMetadataFormat;
+
+    this.nativeStreamMetadataFormatName
+      = nativeStreamMetadataFormatName;
+
+    this.nativeStreamMetadataFormatClassName
+      = nativeStreamMetadataFormatClassName;
+
+    this.extraStreamMetadataFormatNames
+      = extraStreamMetadataFormatNames;
+
+    this.extraStreamMetadataFormatClassNames
+      = extraStreamMetadataFormatClassNames;
+
+    this.supportsStandardImageMetadataFormat
+      = supportsStandardImageMetadataFormat;
+
+    this.nativeImageMetadataFormatName
+      = nativeImageMetadataFormatName;
+
+    this.nativeImageMetadataFormatClassName
+      = nativeImageMetadataFormatClassName;
+
+    this.extraImageMetadataFormatNames
+      = extraImageMetadataFormatNames;
+
+    this.extraImageMetadataFormatClassNames
+      = extraImageMetadataFormatClassNames;
+  }
+
+
+  /**
+   * Returns the human-readable, localized names of the supported
+   * image formats. For example, a plug-in might return an array with
+   * the elements <code>[&#x201c;Tagged Image File Format&#x201d;,
+   * &#x201c;Portable Network Graphics&#x201d;]</code>.
+   */
+  public String[] getFormatNames()
+  {
+    return (String[]) names.clone();
+  }
+
+
+  /**
+   * Returns the file suffixes of the supported image formats, for
+   * example <code>[&#x201c;tiff&#x201d;, &#x201c;tif&#x201d;,
+   * &#x201c;png&#x201d;]</code>.
+   */
+  public String[] getFileSuffixes()
+  {
+    return suffixes;
+  }
+
+
+  /**
+   * Returns the MIME types of the supported image formats, for
+   * example <code>[&#x201c;image/tiff&#x201d;,
+   * &#x201c;image/png&#x201d;]</code>.
+   *
+   * @return an array of MIME type strings, or <code>null</code> if
+   * none of the supported formats has an associated MIME type.
+   */
+  public String[] getMIMETypes()
+  {
+    return MIMETypes;
+  }
+
+
+  /**
+   * Returns the fully qualified name of the class that implements the
+   * {@link javax.imageio.ImageReader} or {@link
+   * javax.imageio.ImageWriter} interface.
+   */
+  public String getPluginClassName()
+  {
+    return pluginClassName;
+  }
+
+
+  /**
+   * Returns whether the per-stream {@linkplain
+   * javax.imageio.metadata.IIOMetadata metadata objects} associated
+   * with this plug-in support format
+   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
+   * <code>getAsTree</code> and <code>setAsTree</code> methods.
+   */
+  public boolean isStandardStreamMetadataFormatSupported()
+  {
+    return supportsStandardStreamMetadataFormat;
+  }
+
+
+  /**
+   * Returns the name of the format that allows encoding all stream
+   * metadata without loss, or <code>null</code> if this plug-in does
+   * not provide a format that preserves all stream metadata.
+   *
+   * @see #getNativeImageMetadataFormatName()
+   */
+  public String getNativeStreamMetadataFormatName()
+  {
+    return nativeStreamMetadataFormatName;
+  }
+
+
+  /**
+   * Returns the names of additional formats for encoding stream
+   * metadata, other than the {@linkplain
+   * #isStandardStreamMetadataFormatSupported() standard} and the
+   * {@linkplain #getNativeStreamMetadataFormatName() native} formats,
+   * or <code>null</code> if this plug-in does not provide any extra
+   * formats.
+   *
+   * @see #getExtraImageMetadataFormatNames()
+   */
+  public String[] getExtraStreamMetadataFormatNames()
+  {
+    return extraStreamMetadataFormatNames;
+  }
+
+
+  /**
+   * Returns whether the per-image {@linkplain
+   * javax.imageio.metadata.IIOMetadata metadata objects} associated
+   * with this plug-in support format
+   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
+   * <code>getAsTree</code> and <code>setAsTree</code> methods.
+   */
+  public boolean isStandardImageMetadataFormatSupported()
+  {
+    return supportsStandardImageMetadataFormat;
+  }
+
+
+  /**
+   * Returns the name of the format that allows encoding all image
+   * metadata without loss, or <code>null</code> if this plug-in does
+   * not provide a format that preserves all image metadata.
+   *
+   * @see #getNativeStreamMetadataFormatName()
+   */
+  public String getNativeImageMetadataFormatName()
+  {
+    return nativeImageMetadataFormatName;
+  }
+
+
+  /**
+   * Returns the names of additional formats for encoding image
+   * metadata, other than the {@linkplain
+   * #isStandardImageMetadataFormatSupported() standard} and the
+   * {@linkplain #getNativeImageMetadataFormatName() native} formats,
+   * or <code>null</code> if this plug-in does not provide any extra
+   * formats.
+   *
+   * @see #getExtraStreamMetadataFormatNames()
+   */
+  public String[] getExtraImageMetadataFormatNames()
+  {
+    return extraImageMetadataFormatNames;
+  }
+
+  /**
+   * Returns an IIOMetadataFormat object that represents the requested
+   * stream metadata format or null if the given format is supported
+   * but no IIOMetadataFormat can be created for it.
+   *
+   * @param formatName the requested stream metadata format name
+   *
+   * @return an IIOMetadataFormat object or null
+   *
+   * @throws IllegalArgumentException if formatName is null or is not
+   * one of the standard metadata format or this provider's native or
+   * extra stream metadata formats
+   */
+  public IIOMetadataFormat getStreamMetadataFormat (String formatName)
+  {
+    if (formatName == null)
+      throw new IllegalArgumentException ("null stream metadata format name");
+
+    if (!formatName.equals (getNativeStreamMetadataFormatName())
+        && !formatName.equals (IIOMetadataFormatImpl.standardMetadataFormatName))
+      {
+        String[] extraNames = getExtraStreamMetadataFormatNames ();
+        boolean foundName = false;
+        for (int i = 0; i < extraNames.length; i++)
+          {
+            if (formatName.equals(extraNames[i]))
+              {
+                foundName = true;
+                break;
+              }
+          }
+        if (!foundName)
+          throw new IllegalArgumentException ("unsupported stream metadata format name");
+      }
+
+    if (formatName.equals (IIOMetadataFormatImpl.standardMetadataFormatName))
+      return IIOMetadataFormatImpl.getStandardFormatInstance ();
+    else
+      // Default implementation returns null.
+      return null;
+  }
+
+  /**
+   * Returns an IIOMetadataFormat object that represents the requested
+   * image metadata format or null if the given format is supported
+   * but no IIOMetadataFormat can be created for it.
+   *
+   * @param formatName the requested image metadata format name
+   *
+   * @return an IIOMetadataFormat object or null
+   *
+   * @throws IllegalArgumentException if formatName is null or is not
+   * one of the standard metadata format or this provider's native or
+   * extra image metadata formats
+   */
+  public IIOMetadataFormat getImageMetadataFormat (String formatName)
+  {
+    if (formatName == null)
+      throw new IllegalArgumentException ("null image metadata format name");
+
+    if (!formatName.equals (getNativeImageMetadataFormatName())
+        && !formatName.equals (IIOMetadataFormatImpl.standardMetadataFormatName))
+      {
+        String[] extraNames = getExtraImageMetadataFormatNames ();
+        boolean foundName = false;
+        for (int i = 0; i < extraNames.length; i++)
+          {
+            if (formatName.equals(extraNames[i]))
+              {
+                foundName = true;
+                break;
+              }
+          }
+        if (!foundName)
+          throw new IllegalArgumentException ("unsupported image metadata format name");
+      }
+
+    if (formatName.equals (IIOMetadataFormatImpl.standardMetadataFormatName))
+      return IIOMetadataFormatImpl.getStandardFormatInstance ();
+    else
+      // Default implementation returns null.
+      return null;
+  }
+}
diff --git a/libjava/classpath/javax/imageio/spi/ImageTranscoderSpi.java b/libjava/classpath/javax/imageio/spi/ImageTranscoderSpi.java
new file mode 100644
index 000000000..1c04ad20c
--- /dev/null
+++ b/libjava/classpath/javax/imageio/spi/ImageTranscoderSpi.java
@@ -0,0 +1,84 @@
+/* ImageTranscoderSpi.java -- Factory for image metadata transcoders.
+   Copyright (C) 2004, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+import javax.imageio.ImageTranscoder;
+
+
+/**
+ * An abstract superclass for service providers that create
+ * {@linkplain javax.imageio.ImageTranscoder image metadata
+ * transcoders}.
+ *
+ * @since 1.4
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public abstract class ImageTranscoderSpi
+  extends IIOServiceProvider
+{
+  /**
+   * Constructs a service provider for image metadata transcoders,
+   * given no parameters. It is up to the sub-class to set {@link
+   * #vendorName} and {@link #version} to non-null values.
+   */
+  protected ImageTranscoderSpi()
+  {
+  }
+
+
+  /**
+   * Constructs a service provider for image metadata transcoders,
+   * given the vendor name and a version string.
+   *
+   * @throws IllegalArgumentException if <code>vendorName</code>
+   * or <code>version</code> is <code>null</code>.
+   */
+  public ImageTranscoderSpi(String vendorName, String version)
+  {
+    super(vendorName, version);
+  }
+
+
+  public abstract String getReaderServiceProviderName();
+
+  public abstract String getWriterServiceProviderName();
+
+  public abstract ImageTranscoder createTranscoderInstance();
+}
diff --git a/libjava/classpath/javax/imageio/spi/ImageWriterSpi.java b/libjava/classpath/javax/imageio/spi/ImageWriterSpi.java
new file mode 100644
index 000000000..6a07348cf
--- /dev/null
+++ b/libjava/classpath/javax/imageio/spi/ImageWriterSpi.java
@@ -0,0 +1,135 @@
+/* ImageWriterSpi.java --
+   Copyright (C) 2004  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+import java.awt.image.RenderedImage;
+import java.io.IOException;
+
+import javax.imageio.ImageTypeSpecifier;
+import javax.imageio.ImageWriter;
+import javax.imageio.stream.ImageOutputStream;
+
+/**
+ * @author Michael Koch (konqueror@gmx.de)
+ */
+public abstract class ImageWriterSpi extends ImageReaderWriterSpi
+{
+  public static final Class[] STANDARD_OUTPUT_TYPE =
+    { ImageOutputStream.class };
+
+  protected Class[] outputTypes;
+  protected String[] readerSpiNames;
+
+  protected ImageWriterSpi()
+  {
+    // Do nothing here.
+  }
+
+  public ImageWriterSpi(String vendorName, String version, String[] names,
+                        String[] suffixes, String[] MIMETypes,
+                        String writerClassName, Class[] outputTypes,
+                        String[] readerSpiNames,
+                        boolean supportsStandardStreamMetadataFormat,
+                        String nativeStreamMetadataFormatName,
+                        String nativeStreamMetadataFormatClassName,
+                        String[] extraStreamMetadataFormatNames,
+                        String[] extraStreamMetadataFormatClassNames,
+                        boolean supportsStandardImageMetadataFormat,
+                        String nativeImageMetadataFormatName,
+                        String nativeImageMetadataFormatClassName,
+                        String[] extraImageMetadataFormatNames,
+                        String[] extraImageMetadataFormatClassNames)
+  {
+    super(vendorName, version, names, suffixes, MIMETypes, writerClassName,
+          supportsStandardStreamMetadataFormat, nativeStreamMetadataFormatName,
+          nativeStreamMetadataFormatClassName, extraStreamMetadataFormatNames,
+          extraStreamMetadataFormatClassNames, supportsStandardImageMetadataFormat,
+          nativeImageMetadataFormatName, nativeImageMetadataFormatClassName,
+          extraImageMetadataFormatNames, extraImageMetadataFormatClassNames);
+
+    if (writerClassName == null)
+      throw new IllegalArgumentException("writerClassName is null");
+
+    if (outputTypes == null
+        || outputTypes.length == 0)
+      throw new IllegalArgumentException("outputTypes may not be null or empty");
+
+    this.outputTypes = outputTypes;
+    this.readerSpiNames = readerSpiNames;
+  }
+
+  public abstract boolean canEncodeImage(ImageTypeSpecifier type);
+
+  public boolean canEncodeImage(RenderedImage image)
+  {
+    return canEncodeImage (new ImageTypeSpecifier(image));
+  }
+
+  public ImageWriter createWriterInstance()
+    throws IOException
+  {
+    return createWriterInstance(null);
+  }
+
+  public abstract ImageWriter createWriterInstance(Object extension)
+    throws IOException;
+
+  public String[] getImageReaderSpiNames()
+  {
+    return readerSpiNames;
+  }
+
+  public Class[] getOutputTypes()
+  {
+    return outputTypes;
+  }
+
+  public boolean isFormatLossless()
+  {
+    return true;
+  }
+
+  public boolean isOwnWriter(ImageWriter writer)
+  {
+    if (writer == null)
+      throw new IllegalArgumentException("writer may not be null");
+
+    return pluginClassName.equals(writer.getClass().getName());
+  }
+}
diff --git a/libjava/classpath/javax/imageio/spi/RegisterableService.java b/libjava/classpath/javax/imageio/spi/RegisterableService.java
new file mode 100644
index 000000000..b424e04a3
--- /dev/null
+++ b/libjava/classpath/javax/imageio/spi/RegisterableService.java
@@ -0,0 +1,82 @@
+/* RegisterableService.java -- An interface for service providers.
+   Copyright (C) 2004, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+
+/**
+ * An interface which service providers may optionally implement in
+ * order to get notified when they are added or removed from a {@link
+ * ServiceRegistry}.
+ *
+ * @since 1.4
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public interface RegisterableService
+{
+  /**
+   * Informs this service provider that it has been registered in a
+   * {@link ServiceRegistry}. If this provider gets registered as an
+   * implementor for several service categories, its
+   * <code>onRegistration</code> method will be called multiple times.
+   *
+   * @param registry the registry to which this service provider has
+   * been added.
+   *
+   * @param category the service category for which this provider has
+   * been registered as an implementor.
+   */
+  void onRegistration(ServiceRegistry registry, Class<?> category);
+
+
+  /**
+   * Informs this service provider that it has been de-registered from
+   * a {@link ServiceRegistry}. If this provider had been registered
+   * as an implementor for several service categories, its
+   * <code>onDeregistration</code> method will be called multiple
+   * times.
+   *
+   * @param registry the registry from which this service provider has
+   * been removed.
+   *
+   * @param category the service category for which this provider has
+   * been registered as an implementor.
+   */
+  void onDeregistration(ServiceRegistry registry, Class<?> category);
+}
diff --git a/libjava/classpath/javax/imageio/spi/ServiceRegistry.java b/libjava/classpath/javax/imageio/spi/ServiceRegistry.java
new file mode 100644
index 000000000..d92359688
--- /dev/null
+++ b/libjava/classpath/javax/imageio/spi/ServiceRegistry.java
@@ -0,0 +1,961 @@
+/* ServiceRegistry.java -- A simple registry for service providers.
+   Copyright (C) 2004, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+import gnu.classpath.ServiceFactory;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.IdentityHashMap;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.Map;
+import java.util.NoSuchElementException;
+import java.util.Set;
+
+/**
+ * A registry for service providers.
+ *
+ * @since 1.4
+ *
+ * @author Michael Koch (konqueror@gmx.de)
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public class ServiceRegistry
+{
+  // Package-private to avoid a trampoline.
+  /**
+   * The service categories of this registry.
+   *
+   * <p>Note that we expect that only very few categories will
+   * typically be used with a registry. The most common case will be
+   * one, it seems unlikely that any registry would contain more than
+   * five or six categories. Therefore, we intentionally avoid the
+   * overhead of a HashMap.
+   *
+   * @see #providers
+   */
+  final Class[] categories;
+
+
+  /**
+   * The registered providers for each service category, indexed by
+   * the same index as the {@link #categories} array. If no provider
+   * is registered for a category, the array entry will be
+   * <code>null</code>.
+   *
+   * <p>Note that we expect that only very few providers will
+   * typically be registered for a category. The most common case will
+   * be one or two. Therefore, we intentionally avoid the overhead of
+   * a HashMap.
+   */
+  private final LinkedList[] providers;
+
+
+  /**
+   * The ordring constaints for each service category, indexed by the
+   * same index as the {@link #categories} array. The constraints for
+   * a service category are stored as a <code>Map&lt;Object,
+   * Set&lt;Object&gt;&gt;</code>, where the Map&#x2019;s values are
+   * those providers that need to come after the key.  If no
+   * constraints are imposed on the providers of a category, the array
+   * entry will be <code>null</code>. If no constraints have been set
+   * whatsoever, <code>constraints</code> will be <code>null</code>.
+   *
+   * <p>Note that we expect that only very few constraints will
+   * typically be imposed on a category. The most common case will
+   * be zero.
+   */
+  private IdentityHashMap[] constraints;
+
+
+  /**
+   * Constructs a <code>ServiceRegistry</code> for the specified
+   * service categories.
+   *
+   * @param categories the categories to support
+   *
+   * @throws IllegalArgumentException if <code>categories</code> is
+   * <code>null</code>, or if its {@link Iterator#next()} method
+   * returns <code>null</code>.
+   *
+   * @throws ClassCastException if <code>categories</code> does not
+   * iterate over instances of {@link java.lang.Class}.
+   */
+  public ServiceRegistry(Iterator<Class<?>> categories)
+  {
+    ArrayList cats = new ArrayList(/* expected size */ 10);
+
+    if (categories == null)
+      throw new IllegalArgumentException();
+
+    while (categories.hasNext())
+      {
+        Class cat = (Class) categories.next();
+        if (cat == null)
+          throw new IllegalArgumentException();
+        cats.add(cat);
+      }
+
+    int numCats = cats.size();
+    this.categories = (Class[]) cats.toArray(new Class[numCats]);
+    this.providers = new LinkedList[numCats];
+  }
+
+
+  /**
+   * Finds service providers that are implementing the specified
+   * Service Provider Interface.
+   *
+   * <p><b>On-demand loading:</b> Loading and initializing service
+   * providers is delayed as much as possible. The rationale is that
+   * typical clients will iterate through the set of installed service
+   * providers until one is found that matches some criteria (like
+   * supported formats, or quality of service). In such scenarios, it
+   * might make sense to install only the frequently needed service
+   * providers on the local machine. More exotic providers can be put
+   * onto a server; the server will only be contacted when no suitable
+   * service could be found locally.</p>
+   *
+   * <p><b>Security considerations:</b> Any loaded service providers
+   * are loaded through the specified ClassLoader, or the system
+   * ClassLoader if <code>classLoader</code> is
+   * <code>null</code>. When <code>lookupProviders</code> is called,
+   * the current {@link java.security.AccessControlContext} gets
+   * recorded. This captured security context will determine the
+   * permissions when services get loaded via the <code>next()</code>
+   * method of the returned <code>Iterator</code>.</p>
+   *
+   * @param spi the service provider interface which must be
+   * implemented by any loaded service providers.
+   *
+   * @param loader the class loader that will be used to load the
+   * service providers, or <code>null</code> for the system class
+   * loader. For using the context class loader, see {@link
+   * #lookupProviders(Class)}.
+   *
+   * @return an iterator over instances of <code>spi</code>.
+   *
+   * @throws IllegalArgumentException if <code>spi</code> is
+   * <code>null</code>.
+   */
+  public static <T> Iterator<T> lookupProviders(Class<T> spi,
+                                                ClassLoader loader)
+  {
+    return ServiceFactory.lookupProviders(spi, loader);
+  }
+
+
+  /**
+   * Finds service providers that are implementing the specified
+   * Service Provider Interface, using the context class loader
+   * for loading providers.
+   *
+   * @param spi the service provider interface which must be
+   * implemented by any loaded service providers.
+   *
+   * @return an iterator over instances of <code>spi</code>.
+   *
+   * @throws IllegalArgumentException if <code>spi</code> is
+   * <code>null</code>.
+   *
+   * @see #lookupProviders(Class, ClassLoader)
+   */
+  public static <T> Iterator<T> lookupProviders(Class<T> spi)
+  {
+    return ServiceFactory.lookupProviders(spi);
+  }
+
+
+  /**
+   * Returns an iterator over all service categories.
+   *
+   * @return an unmodifiable {@link
+   * java.util.Iterator}&lt;{@link java.lang.Class}&gt;.
+   */
+  public Iterator<Class<?>> getCategories()
+  {
+    return new Iterator()
+      {
+        int index = -1;
+
+        public boolean hasNext()
+        {
+          return index < categories.length - 1;
+        }
+
+        public Object next()
+        {
+          if (!hasNext())
+            throw new NoSuchElementException();
+
+          return categories[++index];
+        }
+
+        public void remove()
+        {
+          throw new UnsupportedOperationException();
+        }
+      };
+  }
+
+
+  /**
+   * Registers a provider for a service category which is specified by
+   * the class-internal category ID.
+   *
+   * @param provider the service provider to be registered.
+   *
+   * @param cat the service category, which is identified by an index
+   * into the {@link #categories} array.
+   *
+   * @return <code>true</code> if <code>provider</code> is the first
+   * provider that gets registered for the specified service category;
+   * <code>false</code> if other providers have already been
+   * registered for the same servide category.
+   *
+   * @throws IllegalArgumentException if <code>provider</code> is
+   * <code>null</code>.
+   *
+   * @throws ClassCastException if <code>provider</code> does not
+   * implement the specified service provider interface.
+   */
+  private synchronized boolean registerServiceProvider(Object provider,
+                                                       int cat)
+  {
+    LinkedList provs;
+    boolean result;
+    Class category;
+
+    if (provider == null)
+      throw new IllegalArgumentException();
+
+    category = categories[cat];
+    if (!category.isInstance(provider))
+      throw new ClassCastException(category.getName());
+
+    provs = providers[cat];
+    if (provs == null)
+    {
+      result = true;
+      provs = providers[cat] = new LinkedList();
+    }
+    else
+      result = false;
+
+    provs.add(provider);
+    if (provider instanceof RegisterableService)
+      ((RegisterableService) provider).onRegistration(this, category);
+
+    return result;
+  }
+
+
+  /**
+   * Registers a provider for the specified service category.
+   *
+   * <p>If <code>provider</code> implements the {@link
+   * RegisterableService} interface, its {@link
+   * RegisterableService#onRegistration onRegistration} method is
+   * invoked in order to inform the provider about the addition to
+   * this registry.
+   *
+   * @param provider the service provider to be registered.
+   *
+   * @param category the service category under which
+   * <code>provider</code> shall be registered.
+   *
+   * @return <code>true</code> if <code>provider</code> is the first
+   * provider that gets registered for the specified service category;
+   * <code>false</code> if other providers have already been
+   * registered for the same servide category.
+   *
+   * @throws IllegalArgumentException if <code>provider</code> is
+   * <code>null</code>, or if <code>category</code> is not among the
+   * categories passed to the {@linkplain #ServiceRegistry(Iterator)
+   * constructor} of this ServiceRegistry.
+   *
+   * @throws ClassCastException if <code>provider</code> does not
+   * implement <code>category</code>.
+   */
+  public synchronized <T> boolean registerServiceProvider(T provider,
+                                                          Class<T> category)
+  {
+    for (int i = 0; i < categories.length; i++)
+      if (categories[i] == category)
+        return registerServiceProvider(provider, i);
+    throw new IllegalArgumentException();
+  }
+
+
+  /**
+   * Registers a provider under all service categories it
+   * implements.
+   *
+   * <p>If <code>provider</code> implements the {@link
+   * RegisterableService} interface, its {@link
+   * RegisterableService#onRegistration onRegistration} method is
+   * invoked in order to inform the provider about the addition to
+   * this registry. If <code>provider</code> implements several
+   * service categories, <code>onRegistration</code> gets called
+   * multiple times.
+   *
+   * @param provider the service provider to be registered.
+   *
+   * @throws IllegalArgumentException if <code>provider</code> is
+   * <code>null</code>, or if <code>provider</code> does not implement
+   * any of the service categories passed to the {@linkplain
+   * #ServiceRegistry(Iterator) constructor} of this ServiceRegistry.
+   */
+  public synchronized void registerServiceProvider(Object provider)
+  {
+    boolean ok = false;
+
+    if (provider == null)
+      throw new IllegalArgumentException();
+
+    for (int i = 0; i < categories.length; i++)
+      if (categories[i].isInstance(provider))
+        {
+          ok = true;
+          registerServiceProvider(provider, i);
+        }
+
+    if (!ok)
+      throw new IllegalArgumentException();
+  }
+
+
+  /**
+   * Registers a number of providers under all service categories they
+   * implement.
+   *
+   * <p>If a provider implements the {@link RegisterableService}
+   * interface, its {@link RegisterableService#onRegistration
+   * onRegistration} method is invoked in order to inform the provider
+   * about the addition to this registry. If <code>provider</code>
+   * implements several service categories,
+   * <code>onRegistration</code> gets called multiple times.
+   *
+   * @throws IllegalArgumentException if <code>providers</code> is
+   * <code>null</code>, if any iterated provider is <code>null</code>,
+   * or if some iterated provider does not implement any of the
+   * service categories passed to the {@linkplain
+   * #ServiceRegistry(Iterator) constructor} of this
+   * <code>ServiceRegistry</code>.
+   */
+  public synchronized void registerServiceProviders(Iterator<?> providers)
+  {
+    if (providers == null)
+      throw new IllegalArgumentException();
+
+    while (providers.hasNext())
+      registerServiceProvider(providers.next());
+  }
+
+
+  /**
+   * De-registers a provider for a service category which is specified
+   * by the class-internal category ID.
+   *
+   * @param provider the service provider to be registered.
+   *
+   * @param cat the service category, which is identified by an index
+   * into the {@link #categories} array.
+   *
+   * @return <code>true</code> if <code>provider</code> was previously
+   * registered for the specified service category; <code>false</code>
+   * if if the provider had not been registered.
+   *
+   * @throws IllegalArgumentException if <code>provider</code> is
+   * <code>null</code>.
+   *
+   * @throws ClassCastException if <code>provider</code> does not
+   * implement the specified service provider interface.
+   */
+  private synchronized boolean deregisterServiceProvider(Object provider,
+                                                         int cat)
+  {
+    LinkedList provs;
+    boolean result;
+    Class category;
+
+    if (provider == null)
+      throw new IllegalArgumentException();
+
+    category = categories[cat];
+    if (!category.isInstance(provider))
+      throw new ClassCastException(category.getName());
+
+    provs = providers[cat];
+    if (provs == null)
+      return false;
+
+    result = provs.remove(provider);
+    if (provs.isEmpty())
+      providers[cat] = null;
+
+    if (result && (provider instanceof RegisterableService))
+      ((RegisterableService) provider).onDeregistration(this, category);
+
+    return result;
+  }
+
+
+  /**
+   * De-registers a provider for the specified service category.
+   *
+   * <p>If <code>provider</code> implements the {@link
+   * RegisterableService} interface, its {@link
+   * RegisterableService#onDeregistration onDeregistration} method is
+   * invoked in order to inform the provider about the removal from
+   * this registry.
+   *
+   * @param provider the service provider to be de-registered.
+   *
+   * @param category the service category from which
+   * <code>provider</code> shall be de-registered.
+   *
+   * @return <code>true</code> if <code>provider</code> was previously
+   * registered for the specified service category; <code>false</code>
+   * if if the provider had not been registered.
+   *
+   * @throws IllegalArgumentException if <code>provider</code> is
+   * <code>null</code>, or if <code>category</code> is not among the
+   * categories passed to the {@linkplain #ServiceRegistry(Iterator)
+   * constructor} of this ServiceRegistry.
+   *
+   * @throws ClassCastException if <code>provider</code> does not
+   * implement <code>category</code>.
+   */
+  public synchronized <T> boolean deregisterServiceProvider(T provider,
+                                                            Class<T> category)
+  {
+    for (int i = 0; i < categories.length; i++)
+      if (categories[i] == category)
+        return deregisterServiceProvider(provider, i);
+    throw new IllegalArgumentException();
+  }
+
+
+  /**
+   * De-registers a provider from all service categories it
+   * implements.
+   *
+   * <p>If <code>provider</code> implements the {@link
+   * RegisterableService} interface, its {@link
+   * RegisterableService#onDeregistration onDeregistration} method is
+   * invoked in order to inform the provider about the removal from
+   * this registry. If <code>provider</code> implements several
+   * service categories, <code>onDeregistration</code> gets called
+   * multiple times.</p>
+   *
+   * @param provider the service provider to be de-registered.
+   *
+   * @throws IllegalArgumentException if <code>provider</code> is
+   * <code>null</code>, or if <code>provider</code> does not implement
+   * any of the service categories passed to the {@linkplain
+   * #ServiceRegistry(Iterator) constructor} of this
+   * <code>ServiceRegistry</code>.
+   */
+  public synchronized void deregisterServiceProvider(Object provider)
+  {
+    boolean ok = false;
+
+    if (provider == null)
+      throw new IllegalArgumentException();
+
+    for (int i = 0; i < categories.length; i++)
+      if (categories[i].isInstance(provider))
+        {
+          ok = true;
+          deregisterServiceProvider(provider, i);
+        }
+
+    if (!ok)
+      throw new IllegalArgumentException();
+  }
+
+
+  /**
+   * De-registers all providers which have been registered for the
+   * specified service category.
+   *
+   * <p>If a provider implements the {@link RegisterableService}
+   * interface, its {@link RegisterableService#onDeregistration
+   * onDeregistration} method is invoked in order to inform the
+   * provider about the removal from this registry. If the provider
+   * implements several service categories,
+   * <code>onDeregistration</code> gets called multiple times.
+   *
+   * @param category the category whose registered providers will be
+   * de-registered.
+   *
+   * @throws IllegalArgumentException if <code>category</code> is not
+   * among the categories passed to the {@linkplain
+   * #ServiceRegistry(Iterator) constructor} of this
+   * <code>ServiceRegistry</code>.
+   */
+  public synchronized void deregisterAll(Class<?> category)
+  {
+    boolean ok = false;
+
+    for (int i = 0; i < categories.length; i++)
+      {
+        if (categories[i] != category)
+          continue;
+
+        ok = true;
+        while (providers[i] != null)
+          deregisterServiceProvider(providers[i].get(0), i);
+      }
+
+    if (!ok)
+      throw new IllegalArgumentException();
+  }
+
+
+  /**
+   * De-registers all service providers.
+   *
+   * <p>If a provider implements the {@link RegisterableService}
+   * interface, its {@link RegisterableService#onDeregistration
+   * onDeregistration} method is invoked in order to inform the
+   * provider about the removal from this registry. If the provider
+   * implements several service categories,
+   * <code>onDeregistration</code> gets called multiple times.
+   */
+  public synchronized void deregisterAll()
+  {
+    for (int i = 0; i < categories.length; i++)
+      while (providers[i] != null)
+        deregisterServiceProvider(providers[i].get(0), i);
+  }
+
+
+  /**
+   * Called by the Virtual Machine when it detects that this
+   * <code>ServiceRegistry</code> has become garbage. De-registers all
+   * service providers, which will cause those that implement {@link
+   * RegisterableService} to receive a {@link
+   * RegisterableService#onDeregistration onDeregistration}
+   * notification.
+   */
+  public void finalize()
+    throws Throwable
+  {
+    super.finalize();
+    deregisterAll();
+  }
+
+
+  /**
+   * Determines whether a provider has been registered with this
+   * registry.
+   *
+   * @return <code>true</code> if <code>provider</code> has been
+   * registered under any service category; <code>false</code> if
+   * it is not registered.
+   *
+   * @throws IllegalArgumentException if <code>provider</code> is
+   * <code>null</code>.
+   */
+  public synchronized boolean contains(Object provider)
+  {
+    if (provider == null)
+      throw new IllegalArgumentException();
+
+    // Note that contains is rather unlikely to be ever called,
+    // so it would be wasteful to keep a special data structure
+    // (such as a HashSet) for making it a fast operation.
+    for (int i = 0; i < providers.length; i++)
+      {
+        // If provider does not implement categories[i],
+        // it would not have been possible to register it there.
+        // In that case, it would be pointless to look there.
+        if (!categories[i].isInstance(provider))
+          continue;
+
+        // But if the list of registered providers contains provider,
+        // we have found it.
+        LinkedList p = providers[i];
+        if (p != null && p.contains(provider))
+          return true;
+      }
+
+    return false;
+  }
+
+
+  /**
+   * Returns the index in {@link #categories} occupied by the
+   * specified service category.
+   *
+   * @throws IllegalArgumentException if <code>category</code> is not
+   * among the categories passed to the {@linkplain
+   * #ServiceRegistry(Iterator) constructor} of this ServiceRegistry.
+   */
+  private int getCategoryID(Class category)
+  {
+    for (int i = 0; i < categories.length; i++)
+      if (categories[i] == category)
+        return i;
+
+    throw new IllegalArgumentException();
+  }
+
+
+  /**
+   * Retrieves all providers that have been registered for the
+   * specified service category.
+   *
+   * @param category the service category whose providers are
+   * to be retrieved.
+   *
+   * @param useOrdering <code>true</code> in order to retrieve the
+   * providers in an order imposed by the {@linkplain #setOrdering
+   * ordering constraints}; <code>false</code> in order to retrieve
+   * the providers in any order.
+   *
+   * @throws IllegalArgumentException if <code>category</code> is not
+   * among the categories passed to the {@linkplain
+   * #ServiceRegistry(Iterator) constructor} of this
+   * <code>ServiceRegistry</code>.
+   *
+   * @see #getServiceProviders(Class, Filter, boolean)
+   */
+  public <T> Iterator<T> getServiceProviders(Class<T> category,
+                                             boolean useOrdering)
+  {
+    return getServiceProviders(category, null, useOrdering);
+  }
+
+
+  /**
+   * Retrieves all providers that have been registered for the
+   * specified service category and that satisfy the criteria
+   * of a custom filter.
+   *
+   * @param category the service category whose providers are
+   * to be retrieved.
+   *
+   * @param filter a custom filter, or <code>null</code> to
+   * retrieve all registered providers for the specified
+   * category.
+   *
+   * @param useOrdering <code>true</code> in order to retrieve the
+   * providers in an order imposed by the {@linkplain #setOrdering
+   * ordering constraints}; <code>false</code> in order to retrieve
+   * the providers in any order.
+   *
+   * @throws IllegalArgumentException if <code>category</code> is not
+   * among the categories passed to the {@linkplain
+   * #ServiceRegistry(Iterator) constructor} of this
+   * <code>ServiceRegistry</code>.
+   */
+  public synchronized <T> Iterator<T> getServiceProviders(Class<T> category,
+                                                          Filter filter,
+                                                          boolean useOrdering)
+  {
+    int catid;
+    LinkedList provs;
+    ArrayList result;
+
+    catid = getCategoryID(category);
+    provs = providers[catid];
+    if (provs == null)
+      return Collections.EMPTY_LIST.iterator();
+
+    result = new ArrayList(provs.size());
+    for (Iterator iter = provs.iterator(); iter.hasNext();)
+      {
+        Object provider = iter.next();
+        if (filter == null || filter.filter(provider))
+          result.add(provider);
+      }
+
+    // If we are supposed to obey ordering constraints, and
+    // if any constraints have been imposed on the specified
+    // service category, sort the result.
+    if (useOrdering && constraints != null)
+      {
+        final Map cons = constraints[catid];
+        if (cons != null)
+          Collections.sort(result, new Comparator()
+            {
+              public int compare(Object o1, Object o2)
+              {
+                Set s;
+
+                if (o1 == o2)
+                  return 0;
+
+                s = (Set) cons.get(o1);
+                if (s != null && s.contains(o2))
+                  return -1;  // o1 < o2
+
+                s = (Set) cons.get(o2);
+                if (s != null && s.contains(o1))
+                  return 1;  // o1 > o2
+
+                return 0; // o1 == o2
+              }
+            });
+      }
+
+    return result.iterator();
+  }
+
+
+  /**
+   * Returns one of the service providers that is a subclass of the
+   * specified class.
+   *
+   * @param providerClass a class to search for.
+   */
+  public synchronized <T> T getServiceProviderByClass(Class<T> providerClass)
+  {
+    if (providerClass == null)
+      throw new IllegalArgumentException();
+
+    // Note that the method getServiceProviderByClass is rather
+    // unlikely to be ever called, so it would be wasteful to keep a
+    // special data structure for making it a fast operation.
+    for (int cat = 0; cat < categories.length; cat++)
+      {
+        if (!categories[cat].isAssignableFrom(providerClass))
+          continue;
+
+        LinkedList provs = providers[cat];
+        if (provs == null)
+          continue;
+
+        for (Iterator iter = provs.iterator(); iter.hasNext();)
+          {
+            Object provider = iter.next();
+            if (providerClass.isInstance(provider))
+              return (T) provider;
+          }
+      }
+
+    return null;
+  }
+
+
+  /**
+   * Adds an ordering constraint on service providers.
+   *
+   * @param category the service category to which an ordering
+   * constraint is to be added.
+   *
+   * @param firstProvider the provider which is supposed to come before
+   * <code>second</code>.
+   *
+   * @param secondProvider the provider which is supposed to come after
+   * <code>first</code>.
+   *
+   * @throws IllegalArgumentException if <code>first</code> and
+   * <code>second</code> are referring to the same object, or if one
+   * of them is <code>null</code>.
+   *
+   * @see #unsetOrdering
+   * @see #getServiceProviders(Class, Filter, boolean)
+   */
+  public synchronized <T> boolean setOrdering(Class<T> category,
+                                              T firstProvider,
+                                              T secondProvider)
+  {
+    return addConstraint(getCategoryID(category), firstProvider,
+                         secondProvider);
+  }
+
+
+  /**
+   * Removes an ordering constraint on service providers.
+   *
+   * @param category the service category from which an ordering
+   * constraint is to be removed.
+   *
+   * @param firstProvider the provider which is supposed to come before
+   * <code>second</code>.
+   *
+   * @param secondProvider the provider which is supposed to come after
+   * <code>first</code>.
+   *
+   * @throws IllegalArgumentException if <code>first</code> and
+   * <code>second</code> are referring to the same object, or if one
+   * of them is <code>null</code>.
+   *
+   * @see #setOrdering
+   */
+  public synchronized <T> boolean unsetOrdering(Class<T> category,
+                                                T firstProvider,
+                                                T secondProvider)
+  {
+    return removeConstraint(getCategoryID(category),
+                            firstProvider, secondProvider);
+  }
+
+
+  /**
+   * Adds an ordering constraint on service providers.
+   *
+   * @param catid the service category ID, which is the
+   * category&#x2019;s index into the {@link #categories} array.
+   *
+   * @param first the provider which is supposed to come before
+   * <code>second</code>.
+   *
+   * @param second the provider which is supposed to come after
+   * <code>first</code>.
+   *
+   * @throws IllegalArgumentException if <code>first</code> and
+   * <code>second</code> are referring to the same object, or if one
+   * of them is <code>null</code>.
+   */
+  private boolean addConstraint(int catid, Object first, Object second)
+  {
+    Set s;
+    IdentityHashMap cons;
+
+    // Also checks argument validity.
+    removeConstraint(catid, second, first);
+
+    if (constraints == null)
+      constraints = new IdentityHashMap[categories.length];
+    cons = constraints[catid];
+    if (cons == null)
+      cons = constraints[catid] = new IdentityHashMap();
+
+    s = (Set) cons.get(first);
+    if (s == null)
+      cons.put(first, s = new HashSet());
+    return s.add(second);
+  }
+
+
+  /**
+   * Removes an ordering constraint on service providers.
+   *
+   * @param catid the service category ID, which is the
+   * category&#x2019;s index into the {@link #categories} array.
+   *
+   * @param first the provider which is supposed to come before
+   * <code>second</code>.
+   *
+   * @param second the provider which is supposed to come after
+   * <code>first</code>.
+   *
+   * @throws IllegalArgumentException if <code>first</code> and
+   * <code>second</code> are referring to the same object, or if one
+   * of them is <code>null</code>.
+   */
+  private boolean removeConstraint(int catid, Object first, Object second)
+  {
+    Collection s;
+    IdentityHashMap cons;
+
+    if (first == null || second == null || first == second)
+      throw new IllegalArgumentException();
+
+    if (constraints == null)
+      return false;
+
+    cons = constraints[catid];
+    if (cons == null)
+      return false;
+
+    s = (Collection) cons.get(first);
+    if (s == null)
+      return false;
+
+    if (!s.remove(second))
+      return false;
+
+    // If we removed the last constraint for a service category,
+    // we can get free some memory.
+    if (cons.isEmpty())
+      {
+        constraints[catid] = null;
+        boolean anyConstraints = false;
+        for (int i = 0; i < constraints.length; i++)
+          {
+            if (constraints[i] != null)
+              {
+                anyConstraints = true;
+                break;
+              }
+          }
+        if (!anyConstraints)
+          constraints = null;
+      }
+
+    return true;
+  }
+
+
+  /**
+   * A filter for selecting service providers that match custom
+   * criteria.
+   *
+   * @see ServiceRegistry#getServiceProviders(Class, Filter,
+   * boolean)
+   *
+   * @since 1.4
+   *
+   * @author Michael Koch (konqueror@gmx.de)
+   * @author Sascha Brawer (brawer@dandelis.ch)
+   */
+  public static interface Filter
+  {
+    /**
+     * Checks whether the specified service provider matches the
+     * constraints of this Filter.
+     *
+     * @param provider the service provider in question.
+     *
+     * @return <code>true</code> if <code>provider</code> matches the
+     * criteria; <code>false</code> if it does not match.
+     */
+    boolean filter(Object provider);
+  }
+}
diff --git a/libjava/classpath/javax/imageio/spi/package.html b/libjava/classpath/javax/imageio/spi/package.html
new file mode 100644
index 000000000..69fe33f60
--- /dev/null
+++ b/libjava/classpath/javax/imageio/spi/package.html
@@ -0,0 +1,46 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
+<!-- package.html - describes classes in javax.imageio.spi package.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. -->
+
+<html>
+<head><title>GNU Classpath - javax.imageio.spi</title></head>
+
+<body>
+<p></p>
+
+</body>
+</html>