| /* |
| * 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.logging.log4j.core.util; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| /** |
| * Writes all data to the famous <b>/dev/null</b>. |
| * <p> |
| * This output stream has no destination (file/socket etc.) and all bytes written to it are ignored and lost. |
| * </p> |
| * Originally from Apache Commons IO. |
| * |
| * @since 2.3 |
| */ |
| public class NullOutputStream extends OutputStream { |
| |
| private static final NullOutputStream INSTANCE = new NullOutputStream(); |
| |
| /** |
| * Gets the singleton instance. |
| * |
| * @return the singleton instance. |
| */ |
| public static NullOutputStream getInstance() { |
| return INSTANCE; |
| } |
| |
| private NullOutputStream() { |
| // do nothing |
| } |
| |
| /** |
| * Does nothing - output to <code>/dev/null</code>. |
| * |
| * @param b |
| * The bytes to write |
| * @param off |
| * The start offset |
| * @param len |
| * The number of bytes to write |
| */ |
| @Override |
| public void write(final byte[] b, final int off, final int len) { |
| // to /dev/null |
| } |
| |
| /** |
| * Does nothing - output to <code>/dev/null</code>. |
| * |
| * @param b |
| * The byte to write |
| */ |
| @Override |
| public void write(final int b) { |
| // to /dev/null |
| } |
| |
| /** |
| * Does nothing - output to <code>/dev/null</code>. |
| * |
| * @param b |
| * The bytes to write |
| * @throws IOException |
| * never |
| */ |
| @Override |
| public void write(final byte[] b) throws IOException { |
| // to /dev/null |
| } |
| } |