001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.commons.io.output; 018 019 import java.io.IOException; 020 import java.io.OutputStream; 021 022 /** 023 * This OutputStream writes all data to the famous <b>/dev/null</b>. 024 * <p> 025 * This output stream has no destination (file/socket etc.) and all 026 * bytes written to it are ignored and lost. 027 * 028 * @author Jeremias Maerki 029 * @version $Id: NullOutputStream.java 610010 2008-01-08 14:50:59Z niallp $ 030 */ 031 public class NullOutputStream extends OutputStream { 032 033 /** 034 * A singleton. 035 */ 036 public static final NullOutputStream NULL_OUTPUT_STREAM = new NullOutputStream(); 037 038 /** 039 * Does nothing - output to <code>/dev/null</code>. 040 * @param b The bytes to write 041 * @param off The start offset 042 * @param len The number of bytes to write 043 */ 044 public void write(byte[] b, int off, int len) { 045 //to /dev/null 046 } 047 048 /** 049 * Does nothing - output to <code>/dev/null</code>. 050 * @param b The byte to write 051 */ 052 public void write(int b) { 053 //to /dev/null 054 } 055 056 /** 057 * Does nothing - output to <code>/dev/null</code>. 058 * @param b The bytes to write 059 * @throws IOException never 060 */ 061 public void write(byte[] b) throws IOException { 062 //to /dev/null 063 } 064 065 }