Source Code Cross Referenced for SAXException.java in  » IDE-Netbeans » visualweb.api.designer » org » xml » sax » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Netbeans » visualweb.api.designer » org.xml.sax 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        // SAX exception class.
002:        // No warranty; no copyright -- use this as you will.
003:        // $Id$
004:
005:        package org.xml.sax;
006:
007:        /**
008:         * Encapsulate a general SAX error or warning.
009:         *
010:         * <blockquote>
011:         * <em>This module, both source code and documentation, is in the
012:         * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
013:         * </blockquote>
014:         *
015:         * <p>This class can contain basic error or warning information from
016:         * either the XML parser or the application: a parser writer or
017:         * application writer can subclass it to provide additional
018:         * functionality.  SAX handlers may throw this exception or
019:         * any exception subclassed from it.</p>
020:         *
021:         * <p>If the application needs to pass through other types of
022:         * exceptions, it must wrap those exceptions in a SAXException
023:         * or an exception derived from a SAXException.</p>
024:         *
025:         * <p>If the parser or application needs to include information about a
026:         * specific location in an XML document, it should use the
027:         * {@link org.xml.sax.SAXParseException SAXParseException} subclass.</p>
028:         *
029:         * @since SAX 1.0
030:         * @author David Megginson, 
031:         *         <a href="mailto:sax@megginson.com">sax@megginson.com</a>
032:         * @version 2.0
033:         * @see org.xml.sax.SAXParseException
034:         */
035:        public class SAXException extends Exception {
036:
037:            /**
038:             * Create a new SAXException.
039:             *
040:             * @param message The error or warning message.
041:             * @see org.xml.sax.Parser#setLocale
042:             */
043:            public SAXException(String message) {
044:                super (message);
045:                this .exception = null;
046:            }
047:
048:            /**
049:             * Create a new SAXException wrapping an existing exception.
050:             *
051:             * <p>The existing exception will be embedded in the new
052:             * one, and its message will become the default message for
053:             * the SAXException.</p>
054:             *
055:             * @param e The exception to be wrapped in a SAXException.
056:             */
057:            public SAXException(Exception e) {
058:                super ();
059:                this .exception = e;
060:            }
061:
062:            /**
063:             * Create a new SAXException from an existing exception.
064:             *
065:             * <p>The existing exception will be embedded in the new
066:             * one, but the new exception will have its own message.</p>
067:             *
068:             * @param message The detail message.
069:             * @param e The exception to be wrapped in a SAXException.
070:             * @see org.xml.sax.Parser#setLocale
071:             */
072:            public SAXException(String message, Exception e) {
073:                super (message);
074:                this .exception = e;
075:            }
076:
077:            /**
078:             * Return a detail message for this exception.
079:             *
080:             * <p>If there is an embedded exception, and if the SAXException
081:             * has no detail message of its own, this method will return
082:             * the detail message from the embedded exception.</p>
083:             *
084:             * @return The error or warning message.
085:             * @see org.xml.sax.Parser#setLocale
086:             */
087:            public String getMessage() {
088:                String message = super .getMessage();
089:
090:                if (message == null && exception != null) {
091:                    return exception.getMessage();
092:                } else {
093:                    return message;
094:                }
095:            }
096:
097:            /**
098:             * Return the embedded exception, if any.
099:             *
100:             * @return The embedded exception, or null if there is none.
101:             */
102:            public Exception getException() {
103:                return exception;
104:            }
105:
106:            /**
107:             * Override toString to pick up any embedded exception.
108:             *
109:             * @return A string representation of this exception.
110:             */
111:            public String toString() {
112:                if (exception != null) {
113:                    return exception.toString();
114:                } else {
115:                    return super .toString();
116:                }
117:            }
118:
119:            //////////////////////////////////////////////////////////////////////
120:            // Internal state.
121:            //////////////////////////////////////////////////////////////////////
122:
123:            /**
124:             * @serial The embedded exception if tunnelling, or null.
125:             */
126:            private Exception exception;
127:
128:        }
129:
130:        // end of SAXException.java
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