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/*
* $Id$
* ============================================================================
* The Apache Software License, Version 1.1
* ============================================================================
*
* Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modifica-
* tion, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowledgment: "This product includes software
* developed by the Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself, if
* and wherever such third-party acknowledgments normally appear.
*
* 4. The names "FOP" and "Apache Software Foundation" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache", nor may
* "Apache" appear in their name, without prior written permission of the
* Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
* DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ============================================================================
*
* This software consists of voluntary contributions made by many individuals
* on behalf of the Apache Software Foundation and was originally created by
* James Tauber <jtauber@jtauber.com>. For more information on the Apache
* Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.fop.apps;
import org.xml.sax.SAXException;
/**
* Exception thrown when FOP has a problem.
*/
public class FOPException extends Exception {
private static final String EXCEPTION_SEPARATOR = "\n---------\n";
private Throwable exception;
private String systemId;
private int line;
private int column;
/**
* create a new FOP Exception
*
* @param message descriptive message
*/
public FOPException(String message) {
super(message);
}
public FOPException(String message, String systemId, int line, int column) {
super(message);
this.systemId = systemId;
this.line = line;
this.column = column;
}
/**
*
* @param e Throwable object
*/
public FOPException(Throwable e) {
super(e.getMessage());
setException(e);
}
/**
*
* @param message descriptive message
* @param e Throwable object
*/
public FOPException(String message, Throwable e) {
super(message);
setException(e);
}
/**
* Sets exception
* @param t Throwable object
*/
protected void setException(Throwable t) {
exception = t;
}
/**
* Accessor for exception
* @return exception
*/
public Throwable getException() {
return exception;
}
public void setLocation(String systemId, int line, int column) {
this.systemId = systemId;
this.line = line;
this.column = column;
}
public boolean isLocationSet() {
return line>=0;
}
/**
* Attempts to recast the exception as other Throwable types.
* @return the exception recast as another type if possible, otherwise null.
*/
protected Throwable getRootException() {
Throwable result = exception;
if (result instanceof SAXException) {
result = ((SAXException)result).getException();
}
if (result instanceof java.lang.reflect.InvocationTargetException) {
result =
((java.lang.reflect.InvocationTargetException)result).getTargetException();
}
if (result != exception) {
return result;
}
return null;
}
/**
* Write stack trace to stderr
*/
public void printStackTrace() {
synchronized (System.err) {
super.printStackTrace();
if (exception != null) {
System.err.println(EXCEPTION_SEPARATOR);
exception.printStackTrace();
}
if (getRootException() != null) {
System.err.println(EXCEPTION_SEPARATOR);
getRootException().printStackTrace();
}
}
}
/**
* write stack trace on a PrintStream
* @param stream PrintStream on which to write stack trace
*/
public void printStackTrace(java.io.PrintStream stream) {
synchronized (stream) {
super.printStackTrace(stream);
if (exception != null) {
stream.println(EXCEPTION_SEPARATOR);
exception.printStackTrace(stream);
}
if (getRootException() != null) {
stream.println(EXCEPTION_SEPARATOR);
getRootException().printStackTrace(stream);
}
}
}
/**
* Write stack trace on a PrintWriter
* @param writer PrintWriter on which to write stack trace
*/
public void printStackTrace(java.io.PrintWriter writer) {
synchronized (writer) {
super.printStackTrace(writer);
if (exception != null) {
writer.println(EXCEPTION_SEPARATOR);
exception.printStackTrace(writer);
}
if (getRootException() != null) {
writer.println(EXCEPTION_SEPARATOR);
getRootException().printStackTrace(writer);
}
}
}
}
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