1 package org.apache.maven.shared.utils.cli; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 import java.io.IOException; 23 import java.io.InputStream; 24 import java.io.OutputStream; 25 26 /** 27 * Read from an InputStream and write the output to an OutputStream. 28 * 29 * @author <a href="mailto:trygvis@inamo.no">Trygve Laugstøl</a> 30 * @version $Id: StreamFeeder.java 1396135 2012-10-09 17:45:37Z krosenvold $ 31 */ 32 class StreamFeeder 33 extends AbstractStreamHandler 34 { 35 private InputStream input; 36 37 private OutputStream output; 38 39 40 /** 41 * Create a new StreamFeeder 42 * 43 * @param input Stream to read from 44 * @param output Stream to write to 45 */ 46 public StreamFeeder( InputStream input, OutputStream output ) 47 { 48 this.input = input; 49 50 this.output = output; 51 } 52 53 // ---------------------------------------------------------------------- 54 // Runnable implementation 55 // ---------------------------------------------------------------------- 56 57 public void run() 58 { 59 try 60 { 61 feed(); 62 } 63 catch ( Throwable ex ) 64 { 65 // Catched everything so the streams will be closed and flagged as done. 66 } 67 finally 68 { 69 close(); 70 71 synchronized ( this ) 72 { 73 setDone(); 74 75 this.notifyAll(); 76 } 77 } 78 } 79 80 // ---------------------------------------------------------------------- 81 // 82 // ---------------------------------------------------------------------- 83 84 public void close() 85 { 86 if ( input != null ) 87 { 88 synchronized ( input ) 89 { 90 try 91 { 92 input.close(); 93 } 94 catch ( IOException ex ) 95 { 96 // ignore 97 } 98 99 input = null; 100 } 101 } 102 103 if ( output != null ) 104 { 105 synchronized ( output ) 106 { 107 try 108 { 109 output.close(); 110 } 111 catch ( IOException ex ) 112 { 113 // ignore 114 } 115 116 output = null; 117 } 118 } 119 } 120 121 // ---------------------------------------------------------------------- 122 // 123 // ---------------------------------------------------------------------- 124 125 private void feed() 126 throws IOException 127 { 128 int data = input.read(); 129 130 while ( !isDone() && data != -1 ) 131 { 132 synchronized ( output ) 133 { 134 if ( !isDisabled() ) 135 { 136 output.write( data ); 137 } 138 139 data = input.read(); 140 } 141 } 142 } 143 144 }