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    }