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diff --git a/libjava/classpath/javax/activation/DataHandler.java b/libjava/classpath/javax/activation/DataHandler.java
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+/* DataHandler.java -- Handler for data available in multiple formats.
+   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.activation;
+
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.Transferable;
+import java.awt.datatransfer.UnsupportedFlavorException;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PipedInputStream;
+import java.io.PipedOutputStream;
+import java.net.URL;
+
+/**
+ * Handler for data available in multiple sources and formats.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ * @version 1.1
+ */
+public class DataHandler
+  implements Transferable
+{
+
+  private static final DataFlavor[] NO_FLAVORS = new DataFlavor[0];
+  private static DataContentHandlerFactory factory = null;
+
+  private final DataSource dataSource;
+  private DataSource objDataSource;
+  private Object object;
+  private String objectMimeType;
+  private CommandMap currentCommandMap;
+  private DataFlavor[] transferFlavors = NO_FLAVORS;
+  private DataContentHandler dataContentHandler;
+  private DataContentHandler factoryDCH;
+  private DataContentHandlerFactory oldFactory;
+  private String shortType;
+
+  /**
+   * Constructor in which the data is read from a data source.
+   * @param ds the data source
+   */
+  public DataHandler(DataSource ds)
+  {
+    dataSource = ds;
+    oldFactory = factory;
+  }
+
+  /**
+   * Constructor using a reified object representation.
+   * @param obj the object representation of the data
+   * @param mimeType the MIME type of the object
+   */
+  public DataHandler(Object obj, String mimeType)
+  {
+    dataSource = null;
+    object = obj;
+    objectMimeType = mimeType;
+    oldFactory = factory;
+  }
+
+  /**
+   * Constructor in which the data is read from a URL.
+   * @param url the URL
+   */
+  public DataHandler(URL url)
+  {
+    dataSource = new URLDataSource(url);
+    oldFactory = factory;
+  }
+
+  /**
+   * Returns the data source from which data is read.
+   */
+  public DataSource getDataSource()
+  {
+    if (dataSource != null)
+      {
+        return dataSource;
+      }
+    if (objDataSource == null)
+      {
+        objDataSource = new DataHandlerDataSource(this);
+      }
+    return objDataSource;
+  }
+
+  /**
+   * Returns the name of the data object if created with a DataSource.
+   */
+  public String getName()
+  {
+    if (dataSource != null)
+      {
+        return dataSource.getName();
+      }
+    return null;
+  }
+
+  /**
+   * Returns the MIME type of the data (with parameters).
+   */
+  public String getContentType()
+  {
+    if (dataSource != null)
+      {
+        return dataSource.getContentType();
+      }
+    return objectMimeType;
+  }
+
+  /**
+   * Returns an input stream from which the data can be read.
+   */
+  public InputStream getInputStream()
+    throws IOException
+  {
+    if (dataSource != null)
+      {
+        return dataSource.getInputStream();
+      }
+    DataContentHandler dch = getDataContentHandler();
+    if (dch == null)
+      {
+        throw new UnsupportedDataTypeException("no DCH for MIME type " +
+                                               getShortType());
+      }
+    if ((dch instanceof ObjectDataContentHandler) &&
+        ((ObjectDataContentHandler)dch).getDCH() == null)
+      {
+        throw new UnsupportedDataTypeException("no object DCH " +
+                                               "for MIME type " +
+                                               getShortType());
+      }
+    PipedOutputStream pos = new PipedOutputStream();
+    DataContentHandlerWriter dchw =
+      new DataContentHandlerWriter(dch, object, objectMimeType, pos);
+    Thread thread = new Thread(dchw, "DataHandler.getInputStream");
+    thread.start();
+    return new PipedInputStream(pos);
+  }
+
+  static class DataContentHandlerWriter
+    implements Runnable
+  {
+
+    DataContentHandler dch;
+    Object object;
+    String mimeType;
+    OutputStream out;
+
+    DataContentHandlerWriter(DataContentHandler dch, Object object,
+                             String mimeType, OutputStream out)
+    {
+      this.dch = dch;
+      this.object = object;
+      this.mimeType = mimeType;
+      this.out = out;
+    }
+
+    public void run()
+    {
+      try
+        {
+          dch.writeTo(object, mimeType, out);
+        }
+      catch(IOException e)
+        {
+        }
+      finally
+        {
+          try
+            {
+              out.close();
+            }
+          catch(IOException e)
+            {
+            }
+        }
+    }
+  }
+
+  /**
+   * Writes the data as a byte stream.
+   * @param os the stream to write to
+   */
+  public void writeTo(OutputStream os)
+    throws IOException
+  {
+    if (dataSource != null)
+      {
+        InputStream in = dataSource.getInputStream();
+        byte[] buf = new byte[8192];
+        for (int len = in.read(buf); len != -1; len = in.read(buf))
+          {
+            os.write(buf, 0, len);
+          }
+        in.close();
+      }
+    else
+      {
+        DataContentHandler dch = getDataContentHandler();
+        dch.writeTo(object, objectMimeType, os);
+      }
+  }
+
+  /**
+   * Returns an output stream that can be used to overwrite the underlying
+   * data, if the DataSource constructor was used.
+   */
+  public OutputStream getOutputStream()
+    throws IOException
+  {
+    if (dataSource != null)
+      {
+        return dataSource.getOutputStream();
+      }
+    return null;
+  }
+
+  /**
+   * Returns the data flavors in which this data is available.
+   */
+  public synchronized DataFlavor[] getTransferDataFlavors()
+  {
+    if (factory != oldFactory || transferFlavors == NO_FLAVORS)
+      {
+        DataContentHandler dch = getDataContentHandler();
+        transferFlavors = dch.getTransferDataFlavors();
+      }
+    return transferFlavors;
+  }
+
+  /**
+   * Indicates whether the specified data flavor is supported for this
+   * data.
+   */
+  public boolean isDataFlavorSupported(DataFlavor flavor)
+  {
+    DataFlavor[] flavors = getTransferDataFlavors();
+    for (int i = 0; i < flavors.length; i++)
+      {
+        if (flavors[i].equals(flavor))
+          {
+            return true;
+          }
+      }
+    return false;
+  }
+
+  /**
+   * Returns an object representing the data to be transferred.
+   * @param flavor the requested data flavor
+   */
+  public Object getTransferData(DataFlavor flavor)
+    throws UnsupportedFlavorException, IOException
+  {
+    DataContentHandler dch = getDataContentHandler();
+    return dch.getTransferData(flavor, dataSource);
+  }
+
+  /**
+   * Sets the command map to be used by this data handler.
+   * Setting to null uses the default command map.
+   * @param commandMap the command map to use
+   */
+  public synchronized void setCommandMap(CommandMap commandMap)
+  {
+    if (commandMap != currentCommandMap || commandMap == null)
+      {
+        transferFlavors = NO_FLAVORS;
+        dataContentHandler = null;
+        currentCommandMap = commandMap;
+      }
+  }
+
+  /**
+   * Returns the preferred commands for this type of data.
+   */
+  public CommandInfo[] getPreferredCommands()
+  {
+    CommandMap commandMap = getCommandMap();
+    return commandMap.getPreferredCommands(getShortType());
+  }
+
+  /**
+   * Returns the complete list of commands for this type of data.
+   */
+  public CommandInfo[] getAllCommands()
+  {
+    CommandMap commandMap = getCommandMap();
+    return commandMap.getAllCommands(getShortType());
+  }
+
+  /**
+   * Returns the specified command.
+   * @param cmdName the command name
+   */
+  public CommandInfo getCommand(String cmdName)
+  {
+    CommandMap commandMap = getCommandMap();
+    return commandMap.getCommand(getShortType(), cmdName);
+  }
+
+  /**
+   * Returns the data as a reified object.
+   */
+  public Object getContent()
+    throws IOException
+  {
+    DataContentHandler dch = getDataContentHandler();
+    return dch.getContent(getDataSource());
+  }
+
+  /**
+   * Returns the instantiated bean using the specified command.
+   * @param cmdInfo the command to instantiate the bean with
+   */
+  public Object getBean(CommandInfo cmdInfo)
+  {
+    try
+      {
+        return cmdInfo.getCommandObject(this, getClass().getClassLoader());
+      }
+    catch (IOException e)
+      {
+        e.printStackTrace(System.err);
+        return null;
+      }
+    catch (ClassNotFoundException e)
+      {
+        e.printStackTrace(System.err);
+        return null;
+      }
+  }
+
+  /**
+   * Sets the data content handler factory.
+   * If the factory has already been set, throws an Error.
+   * @param newFactory the factory to set
+   */
+  public static synchronized void
+    setDataContentHandlerFactory(DataContentHandlerFactory newFactory)
+  {
+    if (factory != null)
+      {
+        throw new Error("DataContentHandlerFactory already defined");
+      }
+    SecurityManager security = System.getSecurityManager();
+    if (security != null)
+      {
+        try
+          {
+            security.checkSetFactory();
+          }
+        catch (SecurityException e)
+          {
+            if (newFactory != null && DataHandler.class.getClassLoader()
+                != newFactory.getClass().getClassLoader())
+              {
+                throw e;
+              }
+          }
+      }
+    factory = newFactory;
+  }
+
+  /*
+   * Returns just the base part of the data's content-type, with no
+   * parameters.
+   */
+  private synchronized String getShortType()
+  {
+    if (shortType == null)
+      {
+        String contentType = getContentType();
+        try
+          {
+            MimeType mimeType = new MimeType(contentType);
+            shortType = mimeType.getBaseType();
+          }
+        catch (MimeTypeParseException e)
+          {
+            shortType = contentType;
+          }
+      }
+    return shortType;
+  }
+
+  /*
+   * Returns the command map for this handler.
+   */
+  private synchronized CommandMap getCommandMap()
+  {
+    if (currentCommandMap != null)
+      {
+        return currentCommandMap;
+      }
+    return CommandMap.getDefaultCommandMap();
+  }
+
+  /*
+   * Returns the DCH for this handler.
+   */
+  private synchronized DataContentHandler getDataContentHandler()
+  {
+    if (factory != oldFactory)
+      {
+        oldFactory = factory;
+        factoryDCH = null;
+        dataContentHandler = null;
+        transferFlavors = NO_FLAVORS;
+      }
+    if (dataContentHandler != null)
+      {
+        return dataContentHandler;
+      }
+    String mimeType = getShortType();
+    if (factoryDCH == null && factory != null)
+      {
+        factoryDCH = factory.createDataContentHandler(mimeType);
+      }
+    if (factoryDCH != null)
+      {
+        dataContentHandler = factoryDCH;
+      }
+    if (dataContentHandler == null)
+      {
+        CommandMap commandMap = getCommandMap();
+        dataContentHandler = commandMap.createDataContentHandler(mimeType);
+      }
+    if (dataSource != null)
+      {
+        dataContentHandler =
+          new DataSourceDataContentHandler(dataContentHandler, dataSource);
+      }
+    else
+      {
+        dataContentHandler =
+          new ObjectDataContentHandler(dataContentHandler, object,
+                                       objectMimeType);
+      }
+    return dataContentHandler;
+  }
+
+}