001 /* Attribute.java --
002 Copyright (C) 2006 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038 package javax.management;
039
040 import java.io.Serializable;
041
042 /**
043 * Represents an MBean attribute, having the name and the assigned value. The
044 * MBean objects use this class to get and set attributes values.
045 *
046 * @since 1.5
047 *
048 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
049 */
050 public class Attribute
051 implements Serializable
052 {
053 /**
054 * Compatible with JDK 1.5
055 */
056 private static final long serialVersionUID = 2484220110589082382L;
057
058 /**
059 * The attribute name.
060 */
061 final String m_name;
062
063 /**
064 * The attribute value.
065 */
066 final Object m_value;
067
068 /**
069 * Create the attribute with the given name and value.
070 *
071 * @param name the attribute name
072 * @param value the attribute value
073 */
074 public Attribute(String name, Object value)
075 {
076 m_name = name;
077 m_value = value;
078 }
079
080 /**
081 * Compares the attribute with another attribute.
082 *
083 * @param other the other object to compare with
084 *
085 * @return true if both value and object are equal, false otherwise.
086 */
087 public boolean equals(Object other)
088 {
089 if (other instanceof Attribute)
090 {
091 Attribute oa = (Attribute) other;
092 boolean n, v;
093 if (oa.m_name == null || m_name == null)
094 n = oa.m_name == m_name;
095 else
096 n = oa.m_name.equals(m_name);
097
098 if (oa.m_value == null || m_value == null)
099 v = oa.m_value == m_value;
100 else
101 v = oa.m_value.equals(m_value);
102
103 return n && v;
104
105 }
106 else
107 return false;
108 }
109
110 /**
111 * Returns the attribute name.
112 *
113 * @return the attribute name
114 */
115 public String getName()
116 {
117 return m_name;
118 }
119
120 /**
121 * Returns the attribute value.
122 *
123 * @return the attribute value.
124 */
125 public Object getValue()
126 {
127 return m_value;
128 }
129
130 /**
131 * Need to override as {@link #equals} is overridden.
132 *
133 * @return the expression, dependent of the object and name hashcodes.
134 */
135 public int hashCode()
136 {
137 int n = m_name == null ? 0 : m_name.hashCode();
138 int v = m_value == null ? 0 : m_value.hashCode();
139
140 return n ^ v;
141 }
142
143 }