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jeremybenn |
/* Pipe.java --
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.nio.channels;
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import java.io.IOException;
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import java.nio.channels.spi.AbstractSelectableChannel;
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import java.nio.channels.spi.SelectorProvider;
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/**
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* @author Michael Koch
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* @since 1.4
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*/
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public abstract class Pipe
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{
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public abstract static class SinkChannel extends AbstractSelectableChannel
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implements WritableByteChannel, GatheringByteChannel
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{
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/**
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* Initializes the channel.
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*/
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protected SinkChannel(SelectorProvider provider)
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{
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super(provider);
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}
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/**
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* Returns an operation set that is valid on this channel.
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*
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* The only valid operation on this channel is @see SelectionKey.OP_WRITE.
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*/
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public final int validOps()
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{
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return SelectionKey.OP_WRITE;
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}
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}
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public abstract static class SourceChannel extends AbstractSelectableChannel
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implements ReadableByteChannel, ScatteringByteChannel
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{
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/**
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* Initializes the channel.
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*/
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protected SourceChannel(SelectorProvider provider)
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{
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super(provider);
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}
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/**
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* Returns an operation set that is valid on this channel.
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*
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* The only valid operation on this channel is @see SelectionKey.OP_READ.
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*/
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public final int validOps()
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{
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return SelectionKey.OP_READ;
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}
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}
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/**
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* Initializes the pipe.
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*/
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protected Pipe()
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{
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}
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/**
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* Opens a pipe.
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*
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* @exception IOException If an error occurs
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*/
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public static Pipe open() throws IOException
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{
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return SelectorProvider.provider().openPipe();
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}
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/**
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* Returns a pipe's sink channel.
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*/
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public abstract Pipe.SinkChannel sink();
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/**
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* Returns a pipe's source channel
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*/
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public abstract Pipe.SourceChannel source();
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}
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