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Java library for developing web applications
/* XMLException.java NanoXML/Java
*
* $Revision: 1.4 $
* $Date: 2002/01/04 21:03:29 $
* $Name: RELEASE_2_2_1 $
*
* This file is part of NanoXML 2 for Java.
* Copyright (C) 2000-2002 Marc De Scheemaecker, All Rights Reserved.
*
* This software is provided 'as-is', without any express or implied warranty.
* In no event will the authors be held liable for any damages arising from the
* use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software in
* a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*/
package net.n3.nanoxml;
import java.io.PrintStream;
import java.io.PrintWriter;
/**
* An XMLException is thrown when an exception occurred while processing the
* XML data.
*
* @author Marc De Scheemaecker
* @version $Name: RELEASE_2_2_1 $, $Revision: 1.4 $
*/
public class XMLException
extends Exception
{
/**
* The message of the exception.
*/
private String msg;
/**
* The system ID of the XML data where the exception occurred.
*/
private String systemID;
/**
* The line number in the XML data where the exception occurred.
*/
private int lineNr;
/**
* Encapsulated exception.
*/
private Exception encapsulatedException;
/**
* Creates a new exception.
*
* @param msg the message of the exception.
*/
public XMLException(String msg)
{
this(null, -1, null, msg, false);
}
/**
* Creates a new exception.
*
* @param e the encapsulated exception.
*/
public XMLException(Exception e)
{
this(null, -1, e, "Nested Exception", false);
}
/**
* Creates a new exception.
*
* @param systemID the system ID of the XML data where the exception
* occurred
* @param lineNr the line number in the XML data where the exception
* occurred.
* @param e the encapsulated exception.
*/
public XMLException(String systemID,
int lineNr,
Exception e)
{
this(systemID, lineNr, e, "Nested Exception", true);
}
/**
* Creates a new exception.
*
* @param systemID the system ID of the XML data where the exception
* occurred
* @param lineNr the line number in the XML data where the exception
* occurred.
* @param msg the message of the exception.
*/
public XMLException(String systemID,
int lineNr,
String msg)
{
this(systemID, lineNr, null, msg, true);
}
/**
* Creates a new exception.
*
* @param systemID the system ID from where the data came
* @param lineNr the line number in the XML data where the exception
* occurred.
* @param e the encapsulated exception.
* @param msg the message of the exception.
* @param reportParams true if the systemID, lineNr and e params need to be
* appended to the message
*/
public XMLException(String systemID,
int lineNr,
Exception e,
String msg,
boolean reportParams)
{
super(XMLException.buildMessage(systemID, lineNr, e, msg,
reportParams));
this.systemID = systemID;
this.lineNr = lineNr;
this.encapsulatedException = e;
this.msg = XMLException.buildMessage(systemID, lineNr, e, msg,
reportParams);
}
/**
* Builds the exception message
*
* @param systemID the system ID from where the data came
* @param lineNr the line number in the XML data where the exception
* occurred.
* @param e the encapsulated exception.
* @param msg the message of the exception.
* @param reportParams true if the systemID, lineNr and e params need to be
* appended to the message
*/
private static String buildMessage(String systemID,
int lineNr,
Exception e,
String msg,
boolean reportParams)
{
String str = msg;
if (reportParams) {
if (systemID != null) {
str += ", SystemID='" + systemID + "'";
}
if (lineNr >= 0) {
str += ", Line=" + lineNr;
}
if (e != null) {
str += ", Exception: " + e;
}
}
return str;
}
/**
* Cleans up the object when it's destroyed.
*/
protected void finalize()
throws Throwable
{
this.systemID = null;
this.encapsulatedException = null;
super.finalize();
}
/**
* Returns the system ID of the XML data where the exception occurred.
* If there is no system ID known, null is returned.
*/
public String getSystemID()
{
return this.systemID;
}
/**
* Returns the line number in the XML data where the exception occurred.
* If there is no line number known, -1 is returned.
*/
public int getLineNr()
{
return this.lineNr;
}
/**
* Returns the encapsulated exception, or null if no exception is
* encapsulated.
*/
public Exception getException()
{
return this.encapsulatedException;
}
/**
* Dumps the exception stack to a print writer.
*
* @param writer the print writer
*/
public void printStackTrace(PrintWriter writer)
{
super.printStackTrace(writer);
if (this.encapsulatedException != null) {
writer.println("*** Nested Exception:");
this.encapsulatedException.printStackTrace(writer);
}
}
/**
* Dumps the exception stack to an output stream.
*
* @param stream the output stream
*/
public void printStackTrace(PrintStream stream)
{
super.printStackTrace(stream);
if (this.encapsulatedException != null) {
stream.println("*** Nested Exception:");
this.encapsulatedException.printStackTrace(stream);
}
}
/**
* Dumps the exception stack to System.err.
*/
public void printStackTrace()
{
super.printStackTrace();
if (this.encapsulatedException != null) {
System.err.println("*** Nested Exception:");
this.encapsulatedException.printStackTrace();
}
}
/**
* Returns a string representation of the exception.
*/
public String toString()
{
return this.msg;
}
}
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