/* * Copyright 1999-2005 The Apache Software Foundation. *  * Licensed 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.varia;import org.apache.log4j.spi.Filter;import org.apache.log4j.spi.LoggingEvent;/**   This filter drops all logging events.    <p>You can add this filter to the end of a filter chain to   switch from the default "accept all unless instructed otherwise"   filtering behaviour to a "deny all unless instructed otherwise"   behaviour.   @author Ceki G&uuml;lc&uuml;   @since 0.9.0 */public class DenyAllFilter extends Filter {  /**     Returns <code>null</code> as there are no options.          @deprecated We now use JavaBeans introspection to configure     components. Options strings are no longer needed.  */  public  String[] getOptionStrings() {    return null;  }    /**     No options to set.          @deprecated Use the setter method for the option directly instead     of the generic <code>setOption</code> method.   */  public  void setOption(String key, String value) {  }    /**     Always returns the integer constant {@link Filter#DENY}     regardless of the {@link LoggingEvent} parameter.     @param event The LoggingEvent to filter.     @return Always returns {@link Filter#DENY}.  */  public  int decide(LoggingEvent event) {    return Filter.DENY;  }}