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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2000 Michael Powers
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see http://www.gnu.org
*/
package net.wotonomy.foundation;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.StringWriter;
/**
* Serves to wrap an exception inside of a RuntimeException, which is not
* required to be declared in a throws statement.
*
* @author michael@mpowers.net
* @author $Author: cgruber $
* @version $Revision: 893 $
*/
public class NSForwardException extends RuntimeException {
protected String message;
protected Throwable wrappedThrowable;
/**
* Default constructor.
*/
public NSForwardException() {
super();
message = null;
wrappedThrowable = null;
}
/**
* Standard constructor with message.
*/
public NSForwardException(String aMessage) {
super(aMessage);
message = aMessage;
wrappedThrowable = null;
}
/**
* Specifies a throwable to wrap.
*/
public NSForwardException(Throwable aThrowable) {
super();
message = null;
wrappedThrowable = aThrowable;
}
/**
* Specifies a message and a throwable to wrap.
*/
public NSForwardException(Throwable aThrowable, String aMessage) {
super(aMessage);
message = aMessage;
wrappedThrowable = aThrowable;
}
/**
* Returns the wrapped throwable.
*/
public Throwable originalException() {
return wrappedThrowable;
}
public void printStackTrace(PrintWriter s) {
if (message != null) {
s.println(toString());
}
if (wrappedThrowable != null) {
wrappedThrowable.printStackTrace(s);
return;
}
super.printStackTrace(s);
}
public void printStackTrace(PrintStream s) {
if (message != null) {
s.println(toString());
}
if (wrappedThrowable != null) {
wrappedThrowable.printStackTrace(s);
return;
}
super.printStackTrace(s);
}
public void printStackTrace() {
if (message != null) {
System.err.println(toString());
}
if (wrappedThrowable != null) {
wrappedThrowable.printStackTrace();
return;
}
super.printStackTrace();
}
public String stackTrace() {
StringWriter writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
if (wrappedThrowable != null) {
wrappedThrowable.printStackTrace(printWriter);
} else {
super.printStackTrace(printWriter);
}
printWriter.flush();
printWriter.close();
return writer.toString();
}
public String toString() {
String result = message;
if (result == null)
result = "";
if (wrappedThrowable != null) {
result = wrappedThrowable.toString() + " : " + result;
}
return result;
}
}
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