Source Code Cross Referenced for WrappedException.java in  » Scripting » Kawa » gnu » mapping » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » Kawa » gnu.mapping 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        // Copyright (c) 1999, 2003, 2005  Per M.A. Bothner.
02:        // This is free software;  for terms and warranty disclaimer see ./COPYING.
03:
04:        package gnu.mapping;
05:
06:        /** Encapsulate some Exception inside a RuntimeException.
07:         * Inspired by org.xml.sax.SAXException written by David Megginson.
08:         */
09:
10:        public class WrappedException extends RuntimeException {
11:            /**
12:             * Create a new WrappedException.
13:             */
14:            public WrappedException() {
15:            }
16:
17:            /**
18:             * Create a new WrappedException.
19:             *
20:             * @param message The error or warning message.
21:             */
22:            public WrappedException(String message) {
23:                super (message);
24:            }
25:
26:            /**
27:             * Create a new WrappedException wrapping an existing exception.
28:             *
29:             * <p>The existing exception will be embedded in the new
30:             * one, and its message will become the default message for
31:             * the WrappedException.</p>
32:             *
33:             * @param e The exception to be wrapped in a WrappedException.
34:             */
35:            public WrappedException(Throwable e) {
36:                this (e.toString(), e);
37:            }
38:
39:            /**
40:             * Create a new WrappedException from an existing exception.
41:             *
42:             * <p>The existing exception will be embedded in the new
43:             * one, but the new exception will have its own message.</p>
44:             *
45:             * @param message The detail message.
46:             * @param e The exception to be wrapped in a WrappedException.
47:             */
48:            public WrappedException(String message, Throwable e) {
49:                /* #ifdef use:java.lang.Throwable.getCause */
50:                super (message, e);
51:                /* #else */
52:                // super(message);
53:                // initCause(e);
54:                /* #endif */
55:            }
56:
57:            /**
58:             * Return the embedded exception, if any.
59:             *
60:             * @return The embedded exception, or null if there is none.
61:             */
62:            public Throwable getException() {
63:                return getCause();
64:            }
65:
66:            /**
67:             * Convert this exception to a string.
68:             *
69:             * @return A string version of this exception.
70:             */
71:            public String toString() {
72:                return getMessage();
73:            }
74:
75:            // The initCause/getCause functionality was added in JDK 1.4.
76:            /* #ifndef use:java.lang.Throwable.getCause */
77:            // public Throwable initCause(Throwable cause)
78:            // {
79:            //   exception = cause;
80:            //   return this;
81:            // }
82:            // public Throwable getCause()
83:            // {
84:            //   return exception;
85:            // }
86:            // private Throwable exception;
87:            /* #endif */
88:
89:            /** Coerce argument to a RuntimeException. */
90:            public static RuntimeException wrapIfNeeded(Throwable ex) {
91:                if (ex instanceof  RuntimeException)
92:                    return (RuntimeException) ex;
93:                else
94:                    return new WrappedException(ex);
95:            }
96:        }
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