001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018 package org.apache.commons.proxy.interceptor.filter;
019
020 import org.apache.commons.proxy.interceptor.MethodFilter;
021
022 import java.lang.reflect.Method;
023
024 /**
025 * A method filter implementation that returns true if the method's name matches a supplied regular expression (JDK
026 * regex) pattern string.
027 *
028 * @author James Carman
029 * @since 1.0
030 */
031 public class PatternFilter implements MethodFilter
032 {
033 //----------------------------------------------------------------------------------------------------------------------
034 // Fields
035 //----------------------------------------------------------------------------------------------------------------------
036
037 public static String GETTER_SETTER_PATTERN = "get\\w+|set\\w+";
038 private final String pattern;
039
040 //----------------------------------------------------------------------------------------------------------------------
041 // Static Methods
042 //----------------------------------------------------------------------------------------------------------------------
043
044 /**
045 * Returns a {@link MethodFilter} which accepts only "getters" and "setters."
046 *
047 * @return a {@link MethodFilter} which accepts only "getters" and "setters."
048 */
049 public static MethodFilter getterSetterFilter()
050 {
051 return new PatternFilter( GETTER_SETTER_PATTERN );
052 }
053
054 //----------------------------------------------------------------------------------------------------------------------
055 // Constructors
056 //----------------------------------------------------------------------------------------------------------------------
057
058 public PatternFilter( String pattern )
059 {
060 this.pattern = pattern;
061 }
062
063 //----------------------------------------------------------------------------------------------------------------------
064 // MethodFilter Implementation
065 //----------------------------------------------------------------------------------------------------------------------
066
067 public boolean accepts( Method method )
068 {
069 return method.getName().matches( pattern );
070 }
071 }
072