JtBridge


1   
2   
3   package Jt;
4   import java.util.*;
5   import java.lang.reflect.*;
6   import java.beans.*;
7   import java.io.*;
8   
9   /**
10   * Jt Implementation of the Bridge pattern.
11   */
12  
13  public class JtBridge extends JtObject {
14  
15    private Object   implementor;
16  
17    public JtBridge () {
18    }
19  
20  /**
21    * Specifies the implementor.
22    *
23    * @param implementor implementor
24    */
25  
26    public void setImplementor (Object   implementor) {
27       this.implementor = implementor; 
28  
29    }
30  
31  /**
32    * Returns the implementor.
33    */
34  
35    public Object   getImplementor () {
36       return (implementor);
37    }
38  
39  
40  
41    /**
42      * Process object messages.
43      * <ul>
44      * </ul>
45      */
46  
47    public Object   processMessage (Object   event) {
48  
49     String   msgid = null;
50     JtMessage e = (JtMessage) event;
51     Object   content;
52     Object   data;
53  
54  
55       if (e == null)
56      return null;
57  
58       msgid = (String  ) e.getMsgId ();
59  
60       if (msgid == null)
61      return null;
62  
63       content = e.getMsgContent();
64       //data = e.getMsgData ();
65  
66       if (implementor == null) {
67         handleError ("JtBridge.process: the implementor attribute needs to be set");
68         return (null);
69       }
70  
71       // Let the implementor process the request
72  
73       return (sendMessage (implementor, event));
74  
75  /*
76       if (msgid.equals ("JtREMOVE")) {
77         return (this);     
78       }
79  
80  
81       handleError ("JtBridge.processMessage: invalid message id:" + msgid);
82       return (null);
83  */
84  
85    }
86  
87   
88    /**
89     * Unit tests the messages processed by JtBridge.
90     */
91  
92  
93    public static void main(String  [] args) {
94  
95      JtFactory factory = new JtFactory ();
96      JtBridge bridge;
97  
98      JtMessage msg;
99  
100     // Create an instance of JtBridge
101 
102     bridge = (JtBridge) factory.createObject ("Jt.JtBridge", "bridge");
103 
104     // Remove the object 
105 
106     factory.removeObject ("bridge");
107 
108 
109   }
110 
111 
112 }
113 
114 
115
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