ByteBufferImpl.java, [...]: New files.

2002-11-18  Michael Koch <konqueror@gmx.de>

	* gnu/java/nio/ByteBufferImpl.java,
	gnu/java/nio/CharBufferImpl.java,
	gnu/java/nio/DatagramChannelImpl.java,
	gnu/java/nio/DoubleBufferImpl.java,
	gnu/java/nio/FileChannelImpl.java,
	gnu/java/nio/FloatBufferImpl.java,
	gnu/java/nio/IntBufferImpl.java,
	gnu/java/nio/LongBufferImpl.java,
	gnu/java/nio/PipeImpl.java,
	gnu/java/nio/SelectionKeyImpl.java,
	gnu/java/nio/SelectorImpl.java,
	gnu/java/nio/SelectorProviderImpl.java,
	gnu/java/nio/ServerSocketChannelImpl.java,
	gnu/java/nio/ShortBufferImpl.java,
	gnu/java/nio/SocketChannelImpl.java,
	java/nio/DoubleBuffer.java,
	java/nio/FloatBuffer.java,
	java/nio/IntBuffer.java,
	java/nio/LongBuffer.java,
	java/nio/ShortBuffer.java,
	java/nio/channels/FileChannel.java: New files.

From-SVN: r59216

libjava/java/nio/channels/FileChannel.java

@@ -0,0 +1,135 @@
+/* FileChannel.java -- 
+   Copyright (C) 2002 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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 java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.MappedByteBuffer;
+import java.nio.channels.spi.AbstractInterruptibleChannel;
+
+/**
+ * @author Michael Koch
+ * @since 1.4
+ */
+public abstract class FileChannel extends AbstractInterruptibleChannel
+  implements ByteChannel, GatheringByteChannel, ScatteringByteChannel
+{
+  public static class MapMode
+  {
+    public int m;
+
+    public static MapMode READ_ONLY  = new MapMode(0);
+    public static MapMode READ_WRITE = new MapMode(1);
+    public static MapMode PRIVATE    = new MapMode(2);
+
+    /**
+     * Initializes the MapMode.
+     */
+    MapMode(int a)
+    {
+      m = a;
+    }
+
+    public String toString() 
+    {
+      return "" + m;
+    }
+  }
+
+  /**
+   * Initializes the channel.
+   */
+  protected FileChannel ()
+  {
+  }
+
+  /**
+   * Maps the file into the memory.
+   *
+   * @exception IOException If an error occurs.
+   */
+  public abstract MappedByteBuffer map(MapMode mode, long position, long size)
+    throws IOException;
+
+  /**
+   * Return the size of the file thus far
+   */
+  public abstract long size() throws IOException;
+  
+  /**
+   * Writes data to the channel.
+   *
+   * @exception IOException If an error occurs.
+   */
+  public long write (ByteBuffer[] srcs) throws IOException
+  {
+    long result = 0;
+    
+    for (int i = 0; i < srcs.length; i++)
+      {
+        result += write (srcs[i]);
+      }
+    
+    return result;
+  }
+  
+  /**
+   * Writes data to the channel.
+   */
+  public abstract long write(ByteBuffer[] srcs, int offset, int length)
+    throws IOException;
+  
+  /**
+   * Reads data from the channel.
+   */
+  public abstract int read(ByteBuffer dst) throws IOException;
+  
+  /**
+   * Closes the channel.
+   *
+   * This is called from @see close.
+   *
+   * @exception IOException If an error occurs.
+   */
+  protected abstract void implCloseChannel() throws IOException;
+
+  /**
+   * msync with the disk
+   */
+  public abstract void force(boolean metaData);    
+}