64 lines
1.5 KiB
Java
64 lines
1.5 KiB
Java
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NestedException
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package com.ack.util;
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import java.io.PrintWriter;
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import java.io.StringWriter;
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/**
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* Allows an exception to be nested inside it
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* <p>Note that this class will not be required with J2SE v1.4 and
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* above because java.lang.Exception has been updated to provide
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* this behaviour
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*/
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public class NestedException extends Exception {
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private Throwable underlyingException;
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/**
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* Constructor
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* @param msg The exception error message
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*/
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public NestedException( String msg ) {
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super( msg );
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}
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/**
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* Constructor
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* @param msg The exception error message
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* @param t The nested exception
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*/
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public NestedException( String msg, Throwable t ) {
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super( msg );
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underlyingException = t;
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}
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/**
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* Gets back the original triggering exception
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* @return The original exception as a throwable
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*/
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public Throwable getUnderlyingException() {
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return underlyingException;
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}
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/**
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* Overrides object.toString()
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* @return The exception in string format
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*/
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public String toString() {
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StringWriter sw = new StringWriter();
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PrintWriter pw = new PrintWriter( sw );
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pw.println( getMessage() );
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if( underlyingException != null ) {
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pw.println( "\n==== Exception 'inside' NestedException listed below =====" );
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underlyingException.printStackTrace( pw );
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pw.println( "\n========= end of exception 'inside' NestedException ========= " );
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}
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pw.close();
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return sw.toString();
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}
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}
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