001/* Attribute.java --
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 * 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 */
050public 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}