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Java > Open Source Codes > com > go > trove > net > CheckedSocketException


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52
53 package com.go.trove.net;
54
55 import java.io.*;
56 import java.net.*;
57 import java.lang.ref.*;
58
59 /******************************************************************************
60  * A SocketException that prints out additional detail in the message: address
61  * and port of the socket.
62  *
63  * @author Brian S O'Neill
64  * @version
65  * <!--$$Revision:--> 6 <!-- $-->, <!--$$JustDate:--> 01/01/22 <!-- $-->
66  */

67 public class CheckedSocketException extends SocketException {
68     static CheckedSocketException create
69         (Exception JavaDoc cause, Socket source) {
70         if (cause instanceof CheckedSocketException) {
71             return (CheckedSocketException)cause;
72         }
73         else {
74             return new CheckedSocketException(cause, source);
75         }
76     }
77
78     static CheckedSocketException create
79         (Exception JavaDoc cause, Socket source, String JavaDoc message) {
80         if (cause instanceof CheckedSocketException) {
81             return (CheckedSocketException)cause;
82         }
83         else {
84             return new CheckedSocketException(cause, source, message);
85         }
86     }
87
88     static String JavaDoc createMessagePrefix(Socket source) {
89         return
90             "[" + source.getLocalAddress().getHostAddress() +
91             ':' + source.getLocalPort() +
92             ',' + source.getInetAddress().getHostAddress() +
93             ':' + source.getPort() + ']';
94     }
95
96     private Exception JavaDoc mCause;
97     private String JavaDoc mMessagePrefix;
98     private Reference mSource;
99
100     private CheckedSocketException(Exception JavaDoc cause, Socket source) {
101         this(cause, source, cause.getMessage());
102     }
103
104     private CheckedSocketException(Exception JavaDoc cause, Socket source,
105                                    String JavaDoc message) {
106         super(createMessagePrefix(source) + ' ' + message);
107         mCause = cause;
108         mMessagePrefix = createMessagePrefix(source);
109         mSource = new WeakReference(source);
110     }
111
112     public Exception JavaDoc getCause() {
113         return mCause;
114     }
115
116     /**
117      * Returns null if source socket has been reclaimed by the garbage
118      * collector.
119      */

120     public Socket getSource() {
121         return (Socket)mSource.get();
122     }
123
124     public void printStackTrace() {
125         printStackTrace(System.err);
126     }
127
128     public void printStackTrace(PrintStream ps) {
129         synchronized (ps) {
130             ps.print(mMessagePrefix);
131             ps.print(": ");
132             mCause.printStackTrace(ps);
133         }
134     }
135
136     public void printStackTrace(PrintWriter pw) {
137         synchronized (pw) {
138             pw.print(mMessagePrefix);
139             pw.print(": ");
140             mCause.printStackTrace(pw);
141         }
142     }
143 }
144
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