?? workflowexception.java
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/* * Copyright (c) 2002-2003 by OpenSymphony * All rights reserved. */package com.opensymphony.workflow;import java.io.PrintStream;import java.io.PrintWriter;/** * @author Hani Suleiman (hani@formicary.net) * Date: May 10, 2003 * Time: 11:26:07 AM */public class WorkflowException extends Exception { //~ Instance fields //////////////////////////////////////////////////////// private Throwable rootCause; //~ Constructors /////////////////////////////////////////////////////////// public WorkflowException() { } public WorkflowException(String s) { super(s); } public WorkflowException(String s, Throwable rootCause) { super(s); this.rootCause = rootCause; } public WorkflowException(Throwable rootCause) { this.rootCause = rootCause; } //~ Methods //////////////////////////////////////////////////////////////// public Throwable getCause() { return rootCause; } public String getMessage() { StringBuffer sb = new StringBuffer(); String msg = super.getMessage(); if (msg != null) { sb.append(msg); if (rootCause != null) { sb.append(": "); } } if (rootCause != null) { sb.append("root cause: " + ((rootCause.getMessage() == null) ? rootCause.toString() : rootCause.getMessage())); } return sb.toString(); } public Throwable getRootCause() { return rootCause; } public void printStackTrace() { super.printStackTrace(); if (rootCause != null) { synchronized (System.err) { System.err.println("\nRoot cause:"); rootCause.printStackTrace(); } } } public void printStackTrace(PrintStream s) { super.printStackTrace(s); if (rootCause != null) { synchronized (s) { s.println("\nRoot cause:"); rootCause.printStackTrace(s); } } } public void printStackTrace(PrintWriter s) { super.printStackTrace(s); if (rootCause != null) { synchronized (s) { s.println("\nRoot cause:"); rootCause.printStackTrace(s); } } }}
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