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The source code/* * Copyright 2001-2004 The Apache Software Foundation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.commons.io.input; import java.io.IOException; import java.io.InputStream; /** * Data written to this stream is forwarded to a stream that has been associated * with this thread. * * @author Peter Donald * @version $Revision: 1.5 $ $Date: 2004/02/23 04:38:52 $ */ public class DemuxInputStream extends InputStream { private InheritableThreadLocal m_streams = new InheritableThreadLocal(); /** * Bind the specified stream to the current thread. * * @param input the stream to bind * @return the InputStream that was previously active */ public InputStream bindStream( InputStream input ) { InputStream oldValue = getStream(); m_streams.set( input ); return oldValue; } /** * Closes stream associated with current thread. * * @throws IOException if an error occurs */ public void close() throws IOException { InputStream input = getStream(); if( null != input ) { input.close(); } } /** * Read byte from stream associated with current thread. * * @return the byte read from stream * @throws IOException if an error occurs */ public int read() throws IOException { InputStream input = getStream(); if( null != input ) { return input.read(); } else { return -1; } } /** * Utility method to retrieve stream bound to current thread (if any). */ private InputStream getStream() { return (InputStream)m_streams.get(); } } |
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