Source for javax.management.Attribute

   1: /* Attribute.java --
   2:    Copyright (C) 2006 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package javax.management;
  39: 
  40: import java.io.Serializable;
  41: 
  42: /**
  43:  * Represents an MBean attribute, having the name and the assigned value. The
  44:  * MBean objects use this class to get and set attributes values.
  45:  * 
  46:  * @since 1.5
  47:  * 
  48:  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  49:  */
  50: public class Attribute
  51:   implements Serializable
  52: {
  53:   /**
  54:    * Compatible with JDK 1.5
  55:    */
  56:   private static final long serialVersionUID = 2484220110589082382L;
  57: 
  58:   /**
  59:    * The attribute name.
  60:    */
  61:   final String m_name;
  62: 
  63:   /**
  64:    * The attribute value.
  65:    */
  66:   final Object m_value;
  67: 
  68:   /**
  69:    * Create the attribute with the given name and value.
  70:    * 
  71:    * @param name the attribute name
  72:    * @param value the attribute value
  73:    */
  74:   public Attribute(String name, Object value)
  75:   {
  76:     m_name = name;
  77:     m_value = value;
  78:   }
  79: 
  80:   /**
  81:    * Compares the attribute with another attribute.
  82:    * 
  83:    * @param other the other object to compare with
  84:    * 
  85:    * @return true if both value and object are equal, false otherwise.
  86:    */
  87:   public boolean equals(Object other)
  88:   {
  89:     if (other instanceof Attribute)
  90:       {
  91:         Attribute oa = (Attribute) other;
  92:         boolean n, v;
  93:         if (oa.m_name == null || m_name == null)
  94:           n = oa.m_name == m_name;
  95:         else
  96:           n = oa.m_name.equals(m_name);
  97: 
  98:         if (oa.m_value == null || m_value == null)
  99:           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: }