/* * 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.log4j.performance;import java.io.Writer;import java.io.IOException;/** * <p>Extends {@link Writer} with methods that return immediately * without doing anything. This class is used to measure the cost of * constructing a log message but not actually writing to any device. * </p> * <p><b> <font color="#FF2222">The * <code>org.apache.log4j.performance.NOPWriter</code> class is * intended for internal use only.</font> Consequently, it is not * included in the <em>log4j.jar</em> file.</b> </p> *   * @author Ceki G&uuml;lc&uuml;  * */public class NOPWriter extends Writer {  public void write(char[] cbuf) throws IOException {}  public void write(char[] cbuf, int off, int len) throws IOException {}  public void write(int b) throws IOException {}  public void write(String s) throws IOException {}   public void write(String s, int off, int len) throws IOException {}   public void flush() throws IOException {  }  public void close() throws IOException {    System.err.println("Close called.");  }}