1 files changed, 116 insertions, 0 deletions
diff --git a/libjava/classpath/vm/reference/java/nio/channels/VMChannels.java b/libjava/classpath/vm/reference/java/nio/channels/VMChannels.java
new file mode 100644
index 000000000..05b1441c0
--- /dev/null
+++ b/libjava/classpath/vm/reference/java/nio/channels/VMChannels.java
@@ -0,0 +1,116 @@
+/* VMChannels.java --
+   Copyright (C) 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 java.nio.channels;
+
+import gnu.java.nio.ChannelInputStream;
+import gnu.java.nio.ChannelOutputStream;
+import gnu.java.nio.FileChannelImpl;
+
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+final class VMChannels
+{
+  /**
+   * This class isn't intended to be instantiated.
+   */
+  private VMChannels()
+  {
+    // Do nothing here.
+  }
+
+  private static Object createStream(Class streamClass, Channel ch)
+  {
+    try
+      {
+        Class[] argTypes = new Class[1];
+        argTypes[0] = FileChannelImpl.class;
+        Constructor constructor =
+          streamClass.getDeclaredConstructor(argTypes);
+        constructor.setAccessible(true);
+        Object[] args = new Object[1];
+        args[0] = ch;
+        return constructor.newInstance(args);
+      }
+    catch (IllegalAccessException e)
+      {
+        // Ignored.
+      }
+    catch (InstantiationException e)
+      {
+        // Ignored.
+      }
+    catch (InvocationTargetException e)
+      {
+        // Ignored.
+      }
+    catch (NoSuchMethodException e)
+      {
+        // Ignored.
+      }
+
+    return null;
+  }
+
+  /**
+   * Constructs a stream that reads bytes from the given channel.
+   */
+  static InputStream newInputStream(ReadableByteChannel ch)
+  {
+    if (ch instanceof FileChannelImpl)
+      return (FileInputStream) createStream(FileInputStream.class, ch);
+
+    return  new ChannelInputStream(ch);
+  }
+
+  /**
+   * Constructs a stream that writes bytes to the given channel.
+   */
+  static OutputStream newOutputStream(WritableByteChannel ch)
+  {
+    if (ch instanceof FileChannelImpl)
+      return (FileOutputStream) createStream(FileOutputStream.class, ch);
+
+    return new ChannelOutputStream(ch);
+  }
+}