Source Code Cross Referenced for ChainableException.java in  » Test-Coverage » GroboUtils » net » sourceforge » groboutils » util » throwable » v1 » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Test Coverage » GroboUtils » net.sourceforge.groboutils.util.throwable.v1 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  @(#)ChainableException.java
003:         *
004:         * Copyright (C) 2002-2003 Matt Albrecht
005:         * groboclown@users.sourceforge.net
006:         * http://groboutils.sourceforge.net
007:         *
008:         *  Part of the GroboUtils package at:
009:         *  http://groboutils.sourceforge.net
010:         *
011:         *  Permission is hereby granted, free of charge, to any person obtaining a
012:         *  copy of this software and associated documentation files (the "Software"),
013:         *  to deal in the Software without restriction, including without limitation
014:         *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
015:         *  and/or sell copies of the Software, and to permit persons to whom the 
016:         *  Software is furnished to do so, subject to the following conditions:
017:         *
018:         *  The above copyright notice and this permission notice shall be included in 
019:         *  all copies or substantial portions of the Software. 
020:         *
021:         *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
022:         *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
023:         *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
024:         *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
025:         *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
026:         *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
027:         *  DEALINGS IN THE SOFTWARE.
028:         */
029:        package net.sourceforge.groboutils.util.throwable.v1;
030:
031:        import java.io.PrintStream;
032:        import java.io.PrintWriter;
033:
034:        /**
035:         * General chainable exception, for pseudo-JDK 1.4 support.
036:         *
037:         * @author     Matt Albrecht <a href="mailto:groboclown@users.sourceforge.net">groboclown@users.sourceforge.net</a>
038:         * @version    $Date: 2003/09/23 19:54:07 $
039:         * @since      July 7, 2002
040:         */
041:        public class ChainableException extends Exception implements 
042:                IChainableException {
043:            /**
044:             * @serial
045:             */
046:            private ChainableExceptionHelper ceh;
047:
048:            public ChainableException() {
049:                super ();
050:                this .ceh = new ChainableExceptionHelper(this );
051:            }
052:
053:            public ChainableException(String message) {
054:                super (message);
055:                this .ceh = new ChainableExceptionHelper(this );
056:            }
057:
058:            public ChainableException(Throwable cause) {
059:                super ();
060:                this .ceh = new ChainableExceptionHelper(this , cause);
061:            }
062:
063:            public ChainableException(Throwable cause, String message) {
064:                this (message, cause);
065:            }
066:
067:            public ChainableException(String message, Throwable cause) {
068:                super (message);
069:                this .ceh = new ChainableExceptionHelper(this , cause);
070:            }
071:
072:            /**
073:             * JDK 1.4 compatible method.
074:             * <P>
075:             * <i>from the JDK 1.4 documentation:</i>
076:             * <BLOCKQUOTE>
077:             * Returns the cause of this throwable or <tt>null</tt> if the cause is
078:             * nonexistent or unknown. (The cause is the throwable that caused this
079:             * throwable to get thrown.)
080:             * <P>
081:             * This implementation returns the cause that was supplied via one of the
082:             * constructors requiring a <tt>Throwable</tt>, or that was set after
083:             * creation with the <tt>initCause( Throwable )</tt> method. While it is
084:             * typically unnecessary to override this method, a subclass can override
085:             * it to return a cause set by some other means. This is appropriate for a
086:             * "legacy chained throwable" that predates the addition of chained
087:             * exceptions to <tt>Throwable</tt>. Note that it is not necessary to
088:             * override any of the <tt>PrintStackTrace</tt> methods, all of which
089:             * invoke the getCause method to determine the cause of a throwable.
090:             * </BLOCKQUOTE>
091:             *
092:             * @return the cause of this throwable or <tt>null</tt> if the cause is
093:             *      nonexistent or unknown.
094:             */
095:            public synchronized Throwable getCause() {
096:                return this .ceh.getCause();
097:            }
098:
099:            /**
100:             * JDK 1.4 compatible method.
101:             * <P>
102:             * <i>from the JDK 1.4 documentation:</i>
103:             * <BLOCKQUOTE>
104:             * Initializes the cause of this throwable to the specified value.
105:             * (The cause is the throwable that caused this throwable to get thrown.)
106:             * <P>
107:             * This method can be called at most once. It is generally called from
108:             * within the constructor, or immediately after creating the throwable.
109:             * If this throwable was created with Throwable(Throwable) or
110:             * Throwable(String,Throwable), this method cannot be called even once.
111:             * </BLOCKQUOTE>
112:             *
113:             * @param cause the cause (which is saved for later retrieval by the
114:             *      getCause() method). (A null value is permitted, and indicates
115:             *      that the cause is nonexistent or unknown.)
116:             * @return a reference to this Throwable instance.
117:             * @exception IllegalArgumentException if cause is this throwable.
118:             *      (A throwable cannot be its own cause.)
119:             * @exception IllegalStateException if this throwable was created with
120:             *      Throwable(Throwable) or Throwable(String,Throwable), or this
121:             *      method has already been called on this throwable.
122:             */
123:            public synchronized Throwable initCause(Throwable cause) {
124:                return this .ceh.initCause(cause);
125:            }
126:
127:            /**
128:             * For non-JDK 1.4 compatible VMs, this overrides the original behavior
129:             * to describe the underlying cause.  Special logic is performed to ensure
130:             * that no JDK 1.4 VM is being used when the inner exception is displayed
131:             * (in order to prevent double printing).
132:             */
133:            public void printStackTrace(PrintStream ps) {
134:                this .ceh.printStackTrace(ps);
135:            }
136:
137:            /**
138:             * For non-JDK 1.4 compatible VMs, this overrides the original behavior
139:             * to describe the underlying cause.  Special logic is performed to ensure
140:             * that no JDK 1.4 VM is being used when the inner exception is displayed
141:             * (in order to prevent double printing).
142:             */
143:            public void printStackTrace(PrintWriter pw) {
144:                this.ceh.printStackTrace(pw);
145:            }
146:        }
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