001/* ObjectInstance.java -- Represent the bean instance used by a server. 002 Copyright (C) 2006 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038package javax.management; 039 040import java.io.Serializable; 041 042/** 043 * A simple class used to link a bean instance to its class name. 044 * If the bean is a {@link DynamicMBean}, the class name may be 045 * obtained using {@link MBeanInfo#getClassName()}. 046 * 047 * @author Andrew John Hughes (gnu_andrew@member.fsf.org) 048 * @since 1.5 049 */ 050public class ObjectInstance 051 implements Serializable 052{ 053 054 /** 055 * Compatible with JDK 1.5 056 */ 057 private static final long serialVersionUID = -4099952623687795850L; 058 059 /** 060 * The name of the bean. 061 */ 062 private ObjectName name; 063 064 /** 065 * The class name of the bean. 066 */ 067 private String className; 068 069 /** 070 * Constructs a new {@link ObjectInstance} for the specified bean 071 * with the supplied class name. The class name should include 072 * the full package name. 073 * 074 * @param name the name of the bean. 075 * @param className the class name of the bean. 076 */ 077 public ObjectInstance(ObjectName name, String className) 078 { 079 this.name = name; 080 this.className = className; 081 } 082 083 /** 084 * Constructs a new {@link ObjectInstance} for the specified bean 085 * with the supplied class name. The class name should include 086 * the full package name. 087 * 088 * @param name the name of the bean. 089 * @param className the class name of the bean. 090 * @throws MalformedObjectNameException if the name of the bean 091 * does not match the syntax 092 * of an {@link ObjectName}. 093 */ 094 public ObjectInstance(String name, String className) 095 throws MalformedObjectNameException 096 { 097 this(new ObjectName(name), className); 098 } 099 100 /** 101 * Returns true if the supplied object is also an {@link ObjectInstance} 102 * with the same bean and class name. 103 * 104 * @param obj the object to compare. 105 * @return true if the the supplied object is equal to <code>this</code>. 106 */ 107 public boolean equals(Object obj) 108 { 109 if (!(obj instanceof ObjectInstance)) 110 return false; 111 ObjectInstance i = (ObjectInstance) obj; 112 return (i.getClassName().equals(className) && 113 i.getObjectName().equals(name)); 114 } 115 116 /** 117 * Returns the class name of the bean. 118 * 119 * @return the class name. 120 */ 121 public String getClassName() 122 { 123 return className; 124 } 125 126 /** 127 * Returns the name of the bean. 128 * 129 * @return the name of the bean. 130 */ 131 public ObjectName getObjectName() 132 { 133 return name; 134 } 135 136 /** 137 * Returns a hash code for this instance. This is calculated as 138 * the sum of the hashcodes for the bean's name and the class name. 139 * 140 * @return the hash code of this instance. 141 */ 142 public int hashCode() 143 { 144 return name.hashCode() + className.hashCode(); 145 } 146 147}