Home | History | Annotate | Download | only in output 
      1 /*
      2  * Licensed to the Apache Software Foundation (ASF) under one or more
      3  * contributor license agreements.  See the NOTICE file distributed with
      4  * this work for additional information regarding copyright ownership.
      5  * The ASF licenses this file to You under the Apache License, Version 2.0
      6  * (the "License"); you may not use this file except in compliance with
      7  * the License.  You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 package org.apache.commons.io.output;
     18 
     19 import java.io.IOException;
     20 import java.io.OutputStream;
     21 
     22 /**
     23  * Classic splitter of OutputStream. Named after the unix 'tee'
     24  * command. It allows a stream to be branched off so there
     25  * are now two streams.
     26  *
     27  * @version $Id: TeeOutputStream.java 610010 2008-01-08 14:50:59Z niallp $
     28  */
     29 public class TeeOutputStream extends ProxyOutputStream {
     30 
     31     /** the second OutputStream to write to */
     32     protected OutputStream branch;
     33 
     34     /**
     35      * Constructs a TeeOutputStream.
     36      * @param out the main OutputStream
     37      * @param branch the second OutputStream
     38      */
     39     public TeeOutputStream( OutputStream out, OutputStream branch ) {
     40         super(out);
     41         this.branch = branch;
     42     }
     43 
     44     /**
     45      * Write the bytes to both streams.
     46      * @param b the bytes to write
     47      * @throws IOException if an I/O error occurs
     48      */
     49     public synchronized void write(byte[] b) throws IOException {
     50         super.write(b);
     51         this.branch.write(b);
     52     }
     53 
     54     /**
     55      * Write the specified bytes to both streams.
     56      * @param b the bytes to write
     57      * @param off The start offset
     58      * @param len The number of bytes to write
     59      * @throws IOException if an I/O error occurs
     60      */
     61     public synchronized void write(byte[] b, int off, int len) throws IOException {
     62         super.write(b, off, len);
     63         this.branch.write(b, off, len);
     64     }
     65 
     66     /**
     67      * Write a byte to both streams.
     68      * @param b the byte to write
     69      * @throws IOException if an I/O error occurs
     70      */
     71     public synchronized void write(int b) throws IOException {
     72         super.write(b);
     73         this.branch.write(b);
     74     }
     75 
     76     /**
     77      * Flushes both streams.
     78      * @throws IOException if an I/O error occurs
     79      */
     80     public void flush() throws IOException {
     81         super.flush();
     82         this.branch.flush();
     83     }
     84 
     85     /**
     86      * Closes both streams.
     87      * @throws IOException if an I/O error occurs
     88      */
     89     public void close() throws IOException {
     90         super.close();
     91         this.branch.close();
     92     }
     93 
     94 }
     95