Source Code Cross Referenced for XMLException.java in  » XML-UI » XUI » net » n3 » nanoxml » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML UI » XUI » net.n3.nanoxml 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* XMLException.java                                               NanoXML/Java
002:         *
003:         * $Revision: 1.17 $
004:         * $Date: 2005/01/05 17:20:04 $
005:         * $Name:  $
006:         *
007:         * This file is part of NanoXML 2 for Java.
008:         * Copyright (C) 2000-2002 Marc De Scheemaecker, All Rights Reserved.
009:         *
010:         * This software is provided 'as-is', without any express or implied warranty.
011:         * In no event will the authors be held liable for any damages arising from the
012:         * use of this software.
013:         *
014:         * Permission is granted to anyone to use this software for any purpose,
015:         * including commercial applications, and to alter it and redistribute it
016:         * freely, subject to the following restrictions:
017:         *
018:         *  1. The origin of this software must not be misrepresented; you must not
019:         *     claim that you wrote the original software. If you use this software in
020:         *     a product, an acknowledgment in the product documentation would be
021:         *     appreciated but is not required.
022:         *
023:         *  2. Altered source versions must be plainly marked as such, and must not be
024:         *     misrepresented as being the original software.
025:         *
026:         *  3. This notice may not be removed or altered from any source distribution.
027:         */
028:
029:        package net.n3.nanoxml;
030:
031:        import java.io.PrintStream;
032:        import java.io.PrintWriter;
033:
034:        /**
035:         * An XMLException is thrown when an exception occurred while processing the
036:         * XML data.
037:         *
038:         * @author Marc De Scheemaecker
039:         * @version $Name:  $, $Revision: 1.17 $
040:         */
041:        public class XMLException extends Exception {
042:
043:            /**
044:             * The message of the exception.
045:             */
046:            private String msg;
047:
048:            /**
049:             * The system ID of the XML data where the exception occurred.
050:             */
051:            private String systemID;
052:
053:            /**
054:             * The line number in the XML data where the exception occurred.
055:             */
056:            private int lineNr;
057:
058:            /**
059:             * Encapsulated exception.
060:             */
061:            private Exception encapsulatedException;
062:
063:            /**
064:             * Creates a new exception.
065:             *
066:             * @param msg the message of the exception.
067:             */
068:            public XMLException(String msg) {
069:                this (null, -1, null, msg, false);
070:            }
071:
072:            /**
073:             * Creates a new exception.
074:             *
075:             * @param e the encapsulated exception.
076:             */
077:            public XMLException(Exception e) {
078:                this (null, -1, e, "Nested Exception", false);
079:            }
080:
081:            /**
082:             * Creates a new exception.
083:             *
084:             * @param systemID the system ID of the XML data where the exception
085:             *                 occurred
086:             * @param lineNr   the line number in the XML data where the exception
087:             *                 occurred.
088:             * @param e        the encapsulated exception.
089:             */
090:            public XMLException(String systemID, int lineNr, Exception e) {
091:                this (systemID, lineNr, e, "Nested Exception", true);
092:            }
093:
094:            /**
095:             * Creates a new exception.
096:             *
097:             * @param systemID the system ID of the XML data where the exception
098:             *                 occurred
099:             * @param lineNr   the line number in the XML data where the exception
100:             *                 occurred.
101:             * @param msg      the message of the exception.
102:             */
103:            public XMLException(String systemID, int lineNr, String msg) {
104:                this (systemID, lineNr, null, msg, true);
105:            }
106:
107:            /**
108:             * Creates a new exception.
109:             *
110:             * @param systemID     the system ID from where the data came
111:             * @param lineNr       the line number in the XML data where the exception
112:             *                     occurred.
113:             * @param e            the encapsulated exception.
114:             * @param msg          the message of the exception.
115:             * @param reportParams true if the systemID, lineNr and e params need to be
116:             *                     appended to the message
117:             */
118:            public XMLException(String systemID, int lineNr, Exception e,
119:                    String msg, boolean reportParams) {
120:                super (XMLException.buildMessage(systemID, lineNr, e, msg,
121:                        reportParams));
122:                this .systemID = systemID;
123:                this .lineNr = lineNr;
124:                this .encapsulatedException = e;
125:                this .msg = XMLException.buildMessage(systemID, lineNr, e, msg,
126:                        reportParams);
127:            }
128:
129:            /**
130:             * Builds the exception message
131:             *
132:             * @param systemID     the system ID from where the data came
133:             * @param lineNr       the line number in the XML data where the exception
134:             *                     occurred.
135:             * @param e            the encapsulated exception.
136:             * @param msg          the message of the exception.
137:             * @param reportParams true if the systemID, lineNr and e params need to be
138:             *                     appended to the message
139:             */
140:            private static String buildMessage(String systemID, int lineNr,
141:                    Exception e, String msg, boolean reportParams) {
142:                String str = msg;
143:
144:                if (reportParams) {
145:                    if (systemID != null) {
146:                        str += ", SystemID='" + systemID + "'";
147:                    }
148:
149:                    if (lineNr >= 0) {
150:                        str += ", Line=" + lineNr;
151:                    }
152:
153:                    if (e != null) {
154:                        str += ", Exception: " + e;
155:                    }
156:                }
157:
158:                return str;
159:            }
160:
161:            /**
162:             * Cleans up the object when it's destroyed.
163:             */
164:            protected void finalize() throws Throwable {
165:                this .systemID = null;
166:                this .encapsulatedException = null;
167:                super .finalize();
168:            }
169:
170:            /**
171:             * Returns the system ID of the XML data where the exception occurred.
172:             * If there is no system ID known, null is returned.
173:             */
174:            public String getSystemID() {
175:                return this .systemID;
176:            }
177:
178:            /**
179:             * Returns the line number in the XML data where the exception occurred.
180:             * If there is no line number known, -1 is returned.
181:             */
182:            public int getLineNr() {
183:                return this .lineNr;
184:            }
185:
186:            /**
187:             * Returns the encapsulated exception, or null if no exception is
188:             * encapsulated.
189:             */
190:            public Exception getException() {
191:                return this .encapsulatedException;
192:            }
193:
194:            /**
195:             * Dumps the exception stack to a print writer.
196:             *
197:             * @param writer the print writer
198:             */
199:            public void printStackTrace(PrintWriter writer) {
200:                super .printStackTrace(writer);
201:
202:                if (this .encapsulatedException != null) {
203:                    writer.println("*** Nested Exception:");
204:                    this .encapsulatedException.printStackTrace(writer);
205:                }
206:            }
207:
208:            /**
209:             * Dumps the exception stack to an output stream.
210:             *
211:             * @param stream the output stream
212:             */
213:            public void printStackTrace(PrintStream stream) {
214:                super .printStackTrace(stream);
215:
216:                if (this .encapsulatedException != null) {
217:                    stream.println("*** Nested Exception:");
218:                    this .encapsulatedException.printStackTrace(stream);
219:                }
220:            }
221:
222:            /**
223:             * Dumps the exception stack to System.err.
224:             */
225:            public void printStackTrace() {
226:                super .printStackTrace();
227:
228:                if (this .encapsulatedException != null) {
229:                    System.err.println("*** Nested Exception:");
230:                    this .encapsulatedException.printStackTrace();
231:                }
232:            }
233:
234:            /**
235:             * Returns a string representation of the exception.
236:             */
237:            public String toString() {
238:                return this.msg;
239:            }
240:
241:        }
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