001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019 020 package org.apache.myfaces.tobago.util; 021 022 import org.apache.commons.beanutils.PropertyUtils; 023 import org.apache.commons.logging.Log; 024 import org.apache.commons.logging.LogFactory; 025 026 import java.util.Comparator; 027 import java.io.Serializable; 028 029 /** 030 * Created: Mon Apr 15 15:56:44 2002 031 */ 032 033 public class BeanComparator extends ComparatorBase implements Serializable { 034 035 private static final long serialVersionUID = -7450094725566090886L; 036 037 private static final Log LOG = LogFactory.getLog(BeanComparator.class); 038 039 private String property; 040 041 public BeanComparator(String property) { 042 this.property = property; 043 } 044 045 public BeanComparator(String property, boolean reverse) { 046 super(reverse); 047 this.property = property; 048 } 049 050 public BeanComparator(String property, Comparator comparator) { 051 super(comparator); 052 this.property = property; 053 } 054 055 public BeanComparator(String property, Comparator comparator, boolean reverse) { 056 super(reverse, comparator); 057 this.property = property; 058 } 059 060 /** 061 * @param param1 <description> 062 * @return <description> 063 */ 064 public boolean equals(Object param1) { 065 if (this == param1) { 066 return true; 067 } 068 if (param1 instanceof BeanComparator) { 069 return ((BeanComparator) param1).getProperty().equals(property) 070 && super.equals(param1); 071 } 072 return false; 073 } 074 075 public int hashCode() { 076 int result; 077 result = (property != null ? property.hashCode() : 0); 078 result = 29 * result + super.hashCode(); 079 return result; 080 } 081 082 // implementation of java.util.Comparator interface 083 084 /** 085 * @param param1 <description> 086 * @param param2 <description> 087 * @return <description> 088 */ 089 public int compare(Object param1, Object param2) { 090 Object obj1; 091 Object obj2; 092 try { 093 obj1 = PropertyUtils.getProperty(param1, property); 094 obj2 = PropertyUtils.getProperty(param2, property); 095 096 } catch (Exception e) { 097 LOG.error(e.getMessage(), e); 098 return 0; 099 } 100 101 return internalCompare(obj1, obj2); 102 } 103 104 public String getProperty() { 105 return this.property; 106 } 107 }