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1
30 package com.genimen.djeneric.repository.exceptions;
31
32 import java.io.PrintStream  ;
33 import java.io.PrintWriter ;
34 import java.io.StringWriter ;
35
36 public class DjenericException extends Exception
37 {
38 private static final long serialVersionUID = 4123101775394911796L;
39
40 private final static String CHAINED_MSG = "Chained to: ";
41
42 private String _stackTrace = null;
43 private transient boolean _ignoreMyOwnStack = false;
44 private Throwable _chained = null;
45
46 public DjenericException()
47 {
48 }
49
50 public DjenericException(Throwable chainThis)
51 {
52 super(chainThis.getMessage());
53 storeStack(chainThis);
54 }
55
56 public DjenericException(String message)
57 {
58 super(message);
59 }
60
61 public Throwable getRootException()
62 {
63 if (_chained instanceof DjenericException && _chained != this)
64 {
65 DjenericException dje = (DjenericException) _chained;
66 return dje.getRootException();
67 }
68 if (_chained == null) return this;
69 return _chained;
70 }
71
72 private void storeStack(Throwable theEx)
73 {
74 _chained = theEx;
75 _stackTrace = stack2String(theEx);
76 _ignoreMyOwnStack = true;
77 }
78
79 public void printStackTrace()
80 {
81 if (_stackTrace != null)
82 {
83 System.err.println(_stackTrace);
84 if (!_ignoreMyOwnStack) System.err.print(CHAINED_MSG);
85 }
86 if (!_ignoreMyOwnStack) super.printStackTrace();
87 }
88
89 public void printStackTrace(PrintStream printStream)
90 {
91 if (_stackTrace != null)
92 {
93 printStream.println(_stackTrace);
94 if (!_ignoreMyOwnStack) printStream.print(CHAINED_MSG);
95 }
96 if (!_ignoreMyOwnStack) super.printStackTrace(printStream);
97 }
98
99 public void printStackTrace(PrintWriter writer)
100 {
101 if (_stackTrace != null)
102 {
103 writer.println(_stackTrace);
104 if (!_ignoreMyOwnStack) writer.print(CHAINED_MSG);
105 }
106 if (!_ignoreMyOwnStack) super.printStackTrace(writer);
107 }
108
109 protected String getChainedClassName()
110 {
111 if (_chained != null)
112 {
113 if (_chained instanceof DjenericException) return getClass().getName() + "\n"
114 + ((DjenericException) _chained).getChainedClassName();
115 else return getClass().getName() + "\n" + _chained.getClass().getName();
116 }
117 return getClass().getName();
118 }
119
120 public String toString()
121 {
122 String exceptionMessage = getChainedClassName() + ": ";
123
124 if (getMessage() != null) exceptionMessage += getMessage() + "\n";
125 return exceptionMessage.trim();
126 }
127
128 private String stack2String(Throwable x)
129 {
130 if (x == null) return "";
131
132 StringWriter stringWriter = new StringWriter ();
133 java.io.PrintWriter stackTrace = new java.io.PrintWriter (stringWriter);
134 x.printStackTrace(stackTrace);
135 String result = stringWriter.toString().trim();
136 if (result.length() == 0) result = null;
137
138 return result;
139 }
140
141 public static String getNiceMessage(Exception x)
142 {
143 String msg = x.getMessage();
144 if (x instanceof NumberFormatException )
145 {
146 msg = "Invalid number entered";
147 }
148 return msg;
149 }
150
151 } |
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