Source Code Cross Referenced for OgnlException.java in  » Scripting » OGNL » ognl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » OGNL » ognl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        //--------------------------------------------------------------------------
002:        //	Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
003:        //  All rights reserved.
004:        //
005:        //	Redistribution and use in source and binary forms, with or without
006:        //  modification, are permitted provided that the following conditions are
007:        //  met:
008:        //
009:        //	Redistributions of source code must retain the above copyright notice,
010:        //  this list of conditions and the following disclaimer.
011:        //	Redistributions in binary form must reproduce the above copyright
012:        //  notice, this list of conditions and the following disclaimer in the
013:        //  documentation and/or other materials provided with the distribution.
014:        //	Neither the name of the Drew Davidson nor the names of its contributors
015:        //  may be used to endorse or promote products derived from this software
016:        //  without specific prior written permission.
017:        //
018:        //	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
019:        //  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
020:        //  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
021:        //  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
022:        //  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
023:        //  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
024:        //  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
025:        //  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
026:        //  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
027:        //  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
028:        //  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
029:        //  DAMAGE.
030:        //--------------------------------------------------------------------------
031:        package ognl;
032:
033:        /**
034:         * Superclass for OGNL exceptions, incorporating an optional encapsulated exception.
035:         * @author Luke Blanshard (blanshlu@netscape.net)
036:         * @author Drew Davidson (drew@ognl.org)
037:         */
038:        public class OgnlException extends Exception {
039:            /**
040:             * The root evaluation of the expression when the exception was thrown
041:             */
042:            private Evaluation evaluation;
043:
044:            /**
045:             * Why this exception was thrown.
046:             * @serial
047:             */
048:            private Throwable reason;
049:
050:            /** Constructs an OgnlException with no message or encapsulated exception. */
051:            public OgnlException() {
052:                this (null, null);
053:            }
054:
055:            /**
056:             * Constructs an OgnlException with the given message but no encapsulated exception.
057:             * @param msg the exception's detail message
058:             */
059:            public OgnlException(String msg) {
060:                this (msg, null);
061:            }
062:
063:            /**
064:             * Constructs an OgnlException with the given message and encapsulated exception.
065:             * @param msg     the exception's detail message
066:             * @param reason  the encapsulated exception
067:             */
068:            public OgnlException(String msg, Throwable reason) {
069:                super (msg);
070:                this .reason = reason;
071:            }
072:
073:            /**
074:             * Returns the encapsulated exception, or null if there is none.
075:             * @return the encapsulated exception
076:             */
077:            public Throwable getReason() {
078:                return reason;
079:            }
080:
081:            /**
082:                Returns the Evaluation that was the root evaluation when the exception was
083:                thrown.
084:             */
085:            public Evaluation getEvaluation() {
086:                return evaluation;
087:            }
088:
089:            /**
090:                Sets the Evaluation that was current when this exception was thrown.
091:             */
092:            public void setEvaluation(Evaluation value) {
093:                evaluation = value;
094:            }
095:
096:            /**
097:             * Returns a string representation of this exception.
098:             * @return a string representation of this exception
099:             */
100:            public String toString() {
101:                if (reason == null)
102:                    return super .toString();
103:                return super .toString() + " [" + reason + "]";
104:            }
105:
106:            /**
107:             * Prints the stack trace for this (and possibly the encapsulated) exception on
108:             * System.err.
109:             */
110:            public void printStackTrace() {
111:                printStackTrace(System.err);
112:            }
113:
114:            /**
115:             * Prints the stack trace for this (and possibly the encapsulated) exception on the
116:             * given print stream.
117:             */
118:            public void printStackTrace(java.io.PrintStream s) {
119:                synchronized (s) {
120:                    super .printStackTrace(s);
121:                    if (reason != null) {
122:                        s.println("/-- Encapsulated exception ------------\\");
123:                        reason.printStackTrace(s);
124:                        s.println("\\--------------------------------------/");
125:                    }
126:                }
127:            }
128:
129:            /**
130:             * Prints the stack trace for this (and possibly the encapsulated) exception on the
131:             * given print writer.
132:             */
133:            public void printStackTrace(java.io.PrintWriter s) {
134:                synchronized (s) {
135:                    super .printStackTrace(s);
136:                    if (reason != null) {
137:                        s.println("/-- Encapsulated exception ------------\\");
138:                        reason.printStackTrace(s);
139:                        s.println("\\--------------------------------------/");
140:                    }
141:                }
142:            }
143:        }
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