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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.apps;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
/**
* Exception thrown when FOP has a problem.
*/
public class FOPException extends SAXException {
private static final String EXCEPTION_SEPARATOR = "\n---------\n";
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;
}
public FOPException(String message, Locator locator) {
super(message);
setLocator(locator);
}
/**
*
* @param e Throwable object
*/
public FOPException(Exception e) {
super(e);
}
/**
*
* @param message descriptive message
* @param e Throwable object
*/
public FOPException(String message, Throwable e) {
super(message);
}
public void setLocator(Locator locator) {
if (locator != null) {
this.systemId = locator.getSystemId();
this.line = locator.getLineNumber();
this.column = locator.getColumnNumber();
}
}
public void setLocation(String systemId, int line, int column) {
this.systemId = systemId;
this.line = line;
this.column = column;
}
public boolean isLocationSet() {
return line > 0;
}
public String getMessage() {
if (isLocationSet()) {
return systemId + ":" + line + "," + column + " " + super.getMessage();
} else {
return super.getMessage();
}
}
/**
* 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 = getException();
if (result instanceof SAXException) {
result = ((SAXException)result).getException();
}
if (result instanceof java.lang.reflect.InvocationTargetException) {
result =
((java.lang.reflect.InvocationTargetException)result).getTargetException();
}
if (result != getException()) {
return result;
}
return null;
}
/**
* Write stack trace to stderr
*/
public void printStackTrace() {
synchronized (System.err) {
super.printStackTrace();
if (getException() != null) {
System.err.println(EXCEPTION_SEPARATOR);
getException().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 (getException() != null) {
stream.println(EXCEPTION_SEPARATOR);
getException().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 (getException() != null) {
writer.println(EXCEPTION_SEPARATOR);
getException().printStackTrace(writer);
}
if (getRootException() != null) {
writer.println(EXCEPTION_SEPARATOR);
getRootException().printStackTrace(writer);
}
}
}
}
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