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 18 package org.apache.log4j.varia; 19 20 import org.apache.log4j.spi.Filter; 21 import org.apache.log4j.spi.LoggingEvent; 22 23 24 /** 25 This filter drops all logging events. 26 27 <p>You can add this filter to the end of a filter chain to 28 switch from the default "accept all unless instructed otherwise" 29 filtering behaviour to a "deny all unless instructed otherwise" 30 behaviour. 31 32 33 @author Ceki Gülcü 34 35 @since 0.9.0 */ 36 public class DenyAllFilter extends Filter { 37 38 /** 39 Returns <code>null</code> as there are no options. 40 41 @deprecated We now use JavaBeans introspection to configure 42 components. Options strings are no longer needed. 43 */ 44 public 45 String[] getOptionStrings() { 46 return null; 47 } 48 49 50 /** 51 No options to set. 52 53 @deprecated Use the setter method for the option directly instead 54 of the generic <code>setOption</code> method. 55 */ 56 public 57 void setOption(String key, String value) { 58 } 59 60 /** 61 Always returns the integer constant {@link Filter#DENY} 62 regardless of the {@link LoggingEvent} parameter. 63 64 @param event The LoggingEvent to filter. 65 @return Always returns {@link Filter#DENY}. 66 */ 67 public 68 int decide(LoggingEvent event) { 69 return Filter.DENY; 70 } 71 } 72