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