| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 static org.apache.commons.io.IOUtils.EOF; |
| |
| 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. |
| * |
| * @version $Id$ |
| */ |
| public class DemuxInputStream |
| extends InputStream |
| { |
| private final InheritableThreadLocal<InputStream> m_streams = new InheritableThreadLocal<InputStream>(); |
| |
| /** |
| * Bind the specified stream to the current thread. |
| * |
| * @param input the stream to bind |
| * @return the InputStream that was previously active |
| */ |
| public InputStream bindStream( final InputStream input ) |
| { |
| final InputStream oldValue = m_streams.get(); |
| m_streams.set( input ); |
| return oldValue; |
| } |
| |
| /** |
| * Closes stream associated with current thread. |
| * |
| * @throws IOException if an error occurs |
| */ |
| @Override |
| public void close() |
| throws IOException |
| { |
| final InputStream input = m_streams.get(); |
| 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 |
| */ |
| @Override |
| public int read() |
| throws IOException |
| { |
| final InputStream input = m_streams.get(); |
| if( null != input ) |
| { |
| return input.read(); |
| } |
| else |
| { |
| return EOF; |
| } |
| } |
| } |