DefaultItemMap


1   /*
2    * Copyright (C) 2003  Christian Cryder [christianc@granitepeaks.com]
3    *
4    * This library is free software; you can redistribute it and/or
5    * modify it under the terms of the GNU Lesser General Public
6    * License as published by the Free Software Foundation; either
7    * version 2.1 of the License, or (at your option) any later version.
8    *
9    * This library is distributed in the hope that it will be useful,
10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   * Lesser General Public License for more details.
13   *
14   * You should have received a copy of the GNU Lesser General Public
15   * License along with this library; if not, write to the Free Software
16   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
17   *
18   * $Id: DefaultItemMap.java,v 1.8 2004/02/01 05:16:27 christianc Exp $
19   */
20  package org.enhydra.barracuda.core.comp;
21  
22  import java.util.*;
23  
24  
25  /**
26   * An ItemMap can be returned by the getItem() methods within any of 
27   * the model implementations. It is used to associate a key with a 
28   * particular value. It is primarily used by the BSelect component 
29   * (which can use both key and value information when rendering). 
30   * The other components just use the value information.
31   */
32  public class DefaultItemMap implements ItemMap {
33  
34      protected Object   key = null;
35      protected Object   value = null;
36  
37      /**
38       * Create a new DefaultItemMap with the given key
39       * and value
40       *
41       * @param ikey an int key
42       * @param ivalue the object value
43       */
44      public DefaultItemMap(int ikey, Object   ivalue) {
45          key = new Integer  (ikey);
46          value = ivalue;
47      }
48  
49      /**
50       * Create a new DefaultItemMap with the given key
51       * and value
52       *
53       * @param ikey an Integer key
54       * @param ivalue the object value
55       */
56      public DefaultItemMap(Object   ikey, Object   ivalue) {
57          key = ikey;
58          value = ivalue;
59      }
60  
61      /**
62       * Returns the key corresponding to this entry.
63       */
64      public Object   getKey() {
65          return key;
66      }
67  
68      /**
69       * Returns the value corresponding to this entry. 
70       */           
71      public Object   getValue() {
72          return value;
73      }
74  
75      /**
76       * Replaces the value corresponding to this entry with the specified 
77       * value (optional operation). 
78       */          
79      public Object   setValue(Object   ivalue) {
80          value = ivalue;
81          return value;
82      }
83  
84      /**
85       * Return a String representation of the ItemMap
86       */    
87      public String   toString() {
88  //csc_071602.1 - modify so that if there is a null value in the item map we don't get a null pointer exception here
89  //csc_071602.1        return value.toString();
90          return (value!=null ? value.toString() : "null");   //csc_071602.1
91      }
92  
93  }
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