001package org.apache.commons.jcs3.engine.control.group; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import java.io.Serializable; 023import java.util.Objects; 024 025/** 026 * Description of the Class 027 */ 028public class GroupAttrName<T> 029 implements Serializable 030{ 031 /** Don't change */ 032 private static final long serialVersionUID = 1586079686300744198L; 033 034 /** Description of the Field */ 035 public final GroupId groupId; 036 037 /** the name of the attribute */ 038 public final T attrName; 039 040 /** 041 * Constructor for the GroupAttrName object 042 * @param groupId 043 * @param attrName 044 */ 045 public GroupAttrName( final GroupId groupId, final T attrName ) 046 { 047 this.groupId = groupId; 048 this.attrName = attrName; 049 050 if ( groupId == null ) 051 { 052 throw new IllegalArgumentException( "groupId must not be null." ); 053 } 054 } 055 056 /** 057 * Tests object equality. 058 * @param obj The <code>GroupAttrName</code> instance to test. 059 * @return Whether equal. 060 */ 061 @Override 062 public boolean equals( final Object obj ) 063 { 064 if (!(obj instanceof GroupAttrName)) 065 { 066 return false; 067 } 068 final GroupAttrName<?> to = (GroupAttrName<?>) obj; 069 070 if (groupId.equals( to.groupId )) 071 { 072 return Objects.equals(attrName, to.attrName); 073 } 074 075 return false; 076 } 077 078 /** 079 * @return A hash code based on the hash code of @ #groupid} and {@link #attrName}. 080 */ 081 @Override 082 public int hashCode() 083 { 084 return Objects.hash(groupId, attrName); 085 } 086 087 /** 088 * @return the cached value. 089 */ 090 @Override 091 public String toString() 092 { 093 return String.format("GAN:%s:%s", groupId, Objects.toString(attrName, "")); 094 } 095 096}