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	/*
	* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
	*/
	/*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* contributor license agreements. See the NOTICE file distributed with
	* this work for additional information regarding copyright ownership.
	* The ASF licenses this file to You 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.
	*/

	package com.sun.org.apache.xpath.internal;

	import javax.xml.transform.TransformerException;
	import org.w3c.dom.Node;

	/**
	* This class implements an exception object that all
	* XPath classes will throw in case of an error. This class
	* extends TransformerException, and may hold other exceptions. In the
	* case of nested exceptions, printStackTrace will dump
	* all the traces of the nested exceptions, not just the trace
	* of this object.
	* @xsl.usage general
	* @LastModified: Oct 2017
	*/
	public class XPathException extends TransformerException
	{
	static final long serialVersionUID = 4263549717619045963L;

	/** The home of the expression that caused the error.
	* @serial */
	Object m_styleNode = null;

	/**
	* Get the stylesheet node from where this error originated.
	* @return The stylesheet node from where this error originated, or null.
	*/
	public Object getStylesheetNode()
	{
	return m_styleNode;
	}

	/**
	* Set the stylesheet node from where this error originated.
	* @param styleNode The stylesheet node from where this error originated, or null.
	*/
	public void setStylesheetNode(Object styleNode)
	{
	m_styleNode = styleNode;
	}


	/** A nested exception.
	* @serial */
	protected Exception m_exception;

	/**
	* Create an XPathException object that holds
	* an error message.
	* @param message The error message.
	*/
	public XPathException(String message, ExpressionNode ex)
	{
	super(message);
	this.setLocator(ex);
	setStylesheetNode(getStylesheetNode(ex));
	}

	/**
	* Create an XPathException object that holds
	* an error message.
	* @param message The error message.
	*/
	public XPathException(String message)
	{
	super(message);
	}


	/**
	* Get the XSLT ElemVariable that this sub-expression references. In order for
	* this to work, the SourceLocator must be the owning ElemTemplateElement.
	* @return The dereference to the ElemVariable, or null if not found.
	*/
	public org.w3c.dom.Node getStylesheetNode(ExpressionNode ex)
	{

	ExpressionNode owner = getExpressionOwner(ex);

	if (null != owner && owner instanceof org.w3c.dom.Node)
	{
	return ((org.w3c.dom.Node)owner);
	}
	return null;

	}

	/**
	* Get the first non-Expression parent of this node.
	* @return null or first ancestor that is not an Expression.
	*/
	protected ExpressionNode getExpressionOwner(ExpressionNode ex)
	{
	ExpressionNode parent = ex.exprGetParent();
	while((null != parent) && (parent instanceof Expression))
	parent = parent.exprGetParent();
	return parent;
	}



	/**
	* Create an XPathException object that holds
	* an error message and the stylesheet node that
	* the error originated from.
	* @param message The error message.
	* @param styleNode The stylesheet node that the error originated from.
	*/
	public XPathException(String message, Object styleNode)
	{

	super(message);

	m_styleNode = styleNode;
	}

	/**
	* Create an XPathException object that holds
	* an error message, the stylesheet node that
	* the error originated from, and another exception
	* that caused this exception.
	* @param message The error message.
	* @param styleNode The stylesheet node that the error originated from.
	* @param e The exception that caused this exception.
	*/
	public XPathException(String message, Node styleNode, Exception e)
	{

	super(message);

	m_styleNode = styleNode;
	this.m_exception = e;
	}

	/**
	* Create an XPathException object that holds
	* an error message, and another exception
	* that caused this exception.
	* @param message The error message.
	* @param e The exception that caused this exception.
	*/
	public XPathException(String message, Exception e)
	{

	super(message);

	this.m_exception = e;
	}

	/**
	* Print the the trace of methods from where the error
	* originated. This will trace all nested exception
	* objects, as well as this object.
	* @param s The stream where the dump will be sent to.
	*/
	public void printStackTrace(java.io.PrintStream s)
	{

	if (s == null)
	s = System.err;

	try
	{
	super.printStackTrace(s);
	}
	catch (Exception e){}

	Throwable exception = m_exception;

	for (int i = 0; (i < 10) && (null != exception); i++)
	{
	s.println("---------");
	exception.printStackTrace(s);

	if (exception instanceof TransformerException)
	{
	TransformerException se = (TransformerException) exception;
	Throwable prev = exception;

	exception = se.getException();

	if (prev == exception)
	break;
	}
	else
	{
	exception = null;
	}
	}
	}

	/**
	* Find the most contained message.
	*
	* @return The error message of the originating exception.
	*/
	public String getMessage()
	{

	String lastMessage = super.getMessage();
	Throwable exception = m_exception;

	while (null != exception)
	{
	String nextMessage = exception.getMessage();

	if (null != nextMessage)
	lastMessage = nextMessage;

	if (exception instanceof TransformerException)
	{
	TransformerException se = (TransformerException) exception;
	Throwable prev = exception;

	exception = se.getException();

	if (prev == exception)
	break;
	}
	else
	{
	exception = null;
	}
	}

	return (null != lastMessage) ? lastMessage : "";
	}

	/**
	* Print the the trace of methods from where the error
	* originated. This will trace all nested exception
	* objects, as well as this object.
	* @param s The writer where the dump will be sent to.
	*/
	public void printStackTrace(java.io.PrintWriter s)
	{

	if (s == null)
	s = new java.io.PrintWriter(System.err);

	try
	{
	super.printStackTrace(s);
	}
	catch (Exception e){}


	boolean isJdk14OrHigher = false;
	try {
	Throwable.class.getMethod("getCause", (Class<?>[]) null);
	isJdk14OrHigher = true;
	} catch (NoSuchMethodException nsme) {
	// do nothing
	}

	// The printStackTrace method of the Throwable class in jdk 1.4
	// and higher will include the cause when printing the backtrace.
	// The following code is only required when using jdk 1.3 or lower
	if (!isJdk14OrHigher) {

	Throwable exception = m_exception;

	for (int i = 0; (i < 10) && (null != exception); i++)
	{
	s.println("---------");

	try
	{
	exception.printStackTrace(s);
	}
	catch (Exception e)
	{
	s.println("Could not print stack trace...");
	}

	if (exception instanceof TransformerException)
	{
	TransformerException se = (TransformerException) exception;
	Throwable prev = exception;

	exception = se.getException();

	if (prev == exception)
	{
	exception = null;

	break;
	}
	}
	else
	{
	exception = null;
	}
	}
	}
	}

	/**
	* Return the embedded exception, if any.
	* Overrides javax.xml.transform.TransformerException.getException().
	*
	* @return The embedded exception, or null if there is none.
	*/
	public Throwable getException()
	{
	return m_exception;
	}
	}

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