Initial revision

From-SVN: r102074

1 files changed, 248 insertions, 0 deletions

diff --git a/libjava/classpath/java/nio/channels/SocketChannel.java b/libjava/classpath/java/nio/channels/SocketChannel.java
new file mode 100644
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+++ b/libjava/classpath/java/nio/channels/SocketChannel.java
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+/* SocketChannel.java --
+   Copyright (C) 2002, 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 java.nio.channels;
+
+import java.io.IOException;
+import java.net.Socket;
+import java.net.SocketAddress;
+import java.nio.ByteBuffer;
+import java.nio.channels.spi.AbstractSelectableChannel;
+import java.nio.channels.spi.SelectorProvider;
+
+/**
+ * @author Michael Koch (konqueror@gmx.de)
+ * @since 1.4
+ */
+public abstract class SocketChannel extends AbstractSelectableChannel
+  implements ByteChannel, ScatteringByteChannel, GatheringByteChannel
+{
+  /**
+   * Initializes this socket channel.
+   */
+  protected SocketChannel(SelectorProvider provider)
+  {
+    super(provider);
+  }
+
+  /**
+   * Opens a socket channel.
+   *
+   * @return the new <code>SocketChannel</code> object
+   * 
+   * @exception IOException If an error occurs
+   */
+  public static SocketChannel open() throws IOException
+  {
+    return SelectorProvider.provider().openSocketChannel();
+  }
+
+  /**
+   * Opens a channel and connects it to a remote address.
+   *
+   * @return the new <code>SocketChannel</code> object
+   * 
+   * @exception AsynchronousCloseException If this channel is already connected.
+   * @exception ClosedByInterruptException If another thread interrupts the
+   * current thread while the connect operation is in progress, thereby closing
+   * the channel and setting the current thread's interrupt status.
+   * @exception IOException If an error occurs
+   * @exception SecurityException If a security manager has been installed and
+   * it does not permit access to the given remote endpoint.
+   * @exception UnresolvedAddressException If the given remote address is not
+   * fully resolved.
+   * @exception UnsupportedAddressTypeException If the type of the given remote
+   * address is not supported.
+   */
+  public static SocketChannel open(SocketAddress remote)
+    throws IOException
+  {
+    SocketChannel ch = open();
+    ch.connect(remote);
+    return ch;
+  }
+
+  /**
+   * Reads data from the channel.
+   *
+   * @return the number of bytes read, zero is valid too, -1 if end of stream
+   * is reached
+   *
+   * @exception IOException If an error occurs
+   * @exception NotYetConnectedException If this channel is not yet connected.
+   */
+  public final long read(ByteBuffer[] dsts) throws IOException
+  {
+    long b = 0;
+
+    for (int i = 0; i < dsts.length; i++)
+      b += read(dsts[i]);
+
+    return b;
+  }
+
+  /**
+   * Writes data to the channel.
+   *
+   * @return the number of bytes written, zero is valid too
+   * 
+   * @exception IOException If an error occurs
+   * @exception NotYetConnectedException If this channel is not yet connected.
+   */
+  public final long write(ByteBuffer[] dsts) throws IOException
+  {
+    long b = 0;
+
+    for (int i = 0; i < dsts.length; i++)
+      b += write(dsts[i]);
+
+    return b;
+  }
+
+  /**
+   * Retrieves the valid operations for this channel.
+   *
+   * @return the valid operations
+   */
+  public final int validOps()
+  {
+    return SelectionKey.OP_CONNECT | SelectionKey.OP_READ
+           | SelectionKey.OP_WRITE;
+  }
+
+  /**
+   * Reads data from the channel.
+   *
+   * @return the number of bytes read, zero is valid too, -1 if end of stream
+   * is reached
+   * 
+   * @exception IOException If an error occurs
+   * @exception NotYetConnectedException If this channel is not yet connected.
+   */
+  public abstract int read(ByteBuffer dst) throws IOException;
+
+  /**
+   * Connects the channel's socket to the remote address.
+   *
+   * @return <code>true</code> if the channel got successfully connected,
+   * <code>false</code> if the channel is in non-blocking mode and connection
+   * operation is still in progress.
+   * 
+   * @exception AlreadyConnectedException If this channel is already connected.
+   * @exception AsynchronousCloseException If this channel is already connected.
+   * @exception ClosedByInterruptException If another thread interrupts the
+   * current thread while the connect operation is in progress, thereby closing
+   * the channel and setting the current thread's interrupt status.
+   * @exception ClosedChannelException If this channel is closed.
+   * @exception ConnectionPendingException If a non-blocking connection
+   * operation is already in progress on this channel.
+   * @exception IOException If an error occurs
+   * @exception SecurityException If a security manager has been installed and
+   * it does not permit access to the given remote endpoint.
+   * @exception UnresolvedAddressException If the given remote address is not
+   * fully resolved.
+   * @exception UnsupportedAddressTypeException If the type of the given remote
+   * address is not supported.
+   */
+  public abstract boolean connect(SocketAddress remote)
+    throws IOException;
+
+  /**
+   * Finishes the process of connecting a socket channel.
+   *
+   * @exception AsynchronousCloseException If this channel is already connected.
+   * @exception ClosedByInterruptException If another thread interrupts the
+   * current thread while the connect operation is in progress, thereby closing
+   * the channel and setting the current thread's interrupt status.
+   * @exception ClosedChannelException If this channel is closed.
+   * @exception IOException If an error occurs
+   * @exception NoConnectionPendingException If this channel is not connected
+   * and a connection operation has not been initiated.
+   */
+  public abstract boolean finishConnect() throws IOException;
+
+  /**
+   * Tells whether or not the channel's socket is connected.
+   */
+  public abstract boolean isConnected();
+
+  /**
+   * Tells whether or not a connection operation is in progress on this channel.
+   */
+  public abstract boolean isConnectionPending();
+
+  /**
+   * Reads data from the channel.
+   *
+   * @return the number of bytes read, zero is valid too, -1 if end of stream
+   * is reached
+   * 
+   * @exception IOException If an error occurs
+   * @exception NotYetConnectedException If this channel is not yet connected.
+   */
+  public abstract long read(ByteBuffer[] dsts, int offset, int length)
+    throws IOException;
+
+  /**
+   * Retrieves the channel's socket.
+   *
+   * @return the socket
+   */
+  public abstract Socket socket();
+
+  /**
+   * Writes data to the channel.
+   *
+   * @return the number of bytes written, zero is valid too
+   * 
+   * @exception IOException If an error occurs
+   * @exception NotYetConnectedException If this channel is not yet connected.
+   */
+  public abstract int write(ByteBuffer src) throws IOException;
+
+  /**
+   * Writes data to the channel.
+   *
+   * @return the number of bytes written, zero is valid too
+   * 
+   * @exception IOException If an error occurs
+   * @exception NotYetConnectedException If this channel is not yet connected.
+   */
+  public abstract long write(ByteBuffer[] srcs, int offset, int length)
+    throws IOException;
+}