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.Writer; 20 21 /** 22 * This {@link Writer} writes all data to the famous <b>/dev/null</b>. 23 * <p> 24 * This <code>Writer</code> has no destination (file/socket etc.) and all 25 * characters written to it are ignored and lost. 26 * 27 * @version $Id: NullWriter.java 610010 2008-01-08 14:50:59Z niallp $ 28 */ 29 public class NullWriter extends Writer { 30 31 /** 32 * A singleton. 33 */ 34 public static final NullWriter NULL_WRITER = new NullWriter(); 35 36 /** 37 * Constructs a new NullWriter. 38 */ NullWriter()39 public NullWriter() { 40 } 41 42 /** 43 * Does nothing - output to <code>/dev/null</code>. 44 * @param idx The character to write 45 */ write(int idx)46 public void write(int idx) { 47 //to /dev/null 48 } 49 50 /** 51 * Does nothing - output to <code>/dev/null</code>. 52 * @param chr The characters to write 53 */ write(char[] chr)54 public void write(char[] chr) { 55 //to /dev/null 56 } 57 58 /** 59 * Does nothing - output to <code>/dev/null</code>. 60 * @param chr The characters to write 61 * @param st The start offset 62 * @param end The number of characters to write 63 */ write(char[] chr, int st, int end)64 public void write(char[] chr, int st, int end) { 65 //to /dev/null 66 } 67 68 /** 69 * Does nothing - output to <code>/dev/null</code>. 70 * @param str The string to write 71 */ write(String str)72 public void write(String str) { 73 //to /dev/null 74 } 75 76 /** 77 * Does nothing - output to <code>/dev/null</code>. 78 * @param str The string to write 79 * @param st The start offset 80 * @param end The number of characters to write 81 */ write(String str, int st, int end)82 public void write(String str, int st, int end) { 83 //to /dev/null 84 } 85 86 /** @see java.io.Writer#flush() */ flush()87 public void flush() { 88 //to /dev/null 89 } 90 91 /** @see java.io.Writer#close() */ close()92 public void close() { 93 //to /dev/null 94 } 95 96 } 97