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/*
* $Id: TransformerException.java,v 1.1.1.1 2003-02-01 02:10:28 cbj Exp $
* Copyright (C) 2001 Andrew Selkirk
* Copyright (C) 2001 David Brownell
*
* This file is part of GNU JAXP, a library.
*
* GNU JAXP is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNU JAXP 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* As a special exception, if you link this library with other files to
* produce an executable, this library does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* This exception does not however invalidate any other reasons why the
* executable file might be covered by the GNU General Public License.
*/
package javax.xml.transform;
// Imports
import java.io.*;
/**
* Encapsulates a problem exposed during a transformation.
* @author Andrew Selkirk, David Brownell
* @version 1.0
*/
public class TransformerException extends Exception {
//-------------------------------------------------------------
// Variables --------------------------------------------------
//-------------------------------------------------------------
private SourceLocator locator = null;
private Throwable containedException = null;
private boolean causeKnown;
//-------------------------------------------------------------
// Initialization ---------------------------------------------
//-------------------------------------------------------------
public TransformerException(String msg) {
super(msg);
}
public TransformerException(Throwable cause) {
super();
initCause (cause);
}
public TransformerException(String msg, Throwable cause) {
super(msg);
initCause (cause);
}
public TransformerException(String msg, SourceLocator locator) {
super(msg);
setLocator (locator);
}
public TransformerException(String msg, SourceLocator locator,
Throwable cause) {
super(msg);
setLocator (locator);
initCause (cause);
}
//-------------------------------------------------------------
// Methods ----------------------------------------------------
//-------------------------------------------------------------
/**
* Returns the root cause of this exception,
* or null if none is known.
*/
public Throwable getCause() {
return containedException;
}
/**
* Synonym for {@link #getCause}.
*/
public Throwable getException() {
return containedException;
}
/**
* Returns a readable version of the locator info, or null
* if there is no locator.
*/
public String getLocationAsString() {
if (locator == null)
return null;
StringBuffer retval = new StringBuffer ();
if (locator.getPublicId () != null) {
retval.append ("public='");
retval.append (locator.getPublicId ());
retval.append ("' ");
}
if (locator.getSystemId () != null) {
retval.append ("uri='");
retval.append (locator.getSystemId ());
retval.append ("' ");
}
if (locator.getLineNumber () != -1) {
retval.append ("line=");
retval.append (locator.getLineNumber ());
retval.append (" ");
}
if (locator.getColumnNumber () != -1) {
retval.append ("column=");
retval.append (locator.getColumnNumber ());
//retval.append (" ");
}
return retval.toString ();
}
public SourceLocator getLocator() {
return locator;
}
/**
* Returns this exception's message, with readable location
* information appended if it is available.
*/
public String getMessageAndLocation() {
if (locator == null)
return getMessage ();
return getMessage () + ": " + getLocationAsString ();
}
/**
* Records the root cause of this exception; may be
* called only once, normally during initialization.
*/
public synchronized Throwable initCause(Throwable cause) {
if (cause == this)
throw new IllegalArgumentException ();
if (containedException != null)
throw new IllegalStateException ();
containedException = cause;
causeKnown = true;
// FIXME: spec implies "this" may be the right value; another bug?
return cause;
}
public void printStackTrace() {
printStackTrace(System.out);
}
public void printStackTrace(PrintStream stream) {
PrintWriter out = new PrintWriter(
new OutputStreamWriter(stream));
printStackTrace(out);
out.flush ();
}
public void printStackTrace(PrintWriter writer) {
if (containedException != null) {
containedException.printStackTrace(writer);
}
super.printStackTrace(writer);
}
public void setLocator (SourceLocator location) {
locator = location;
}
}
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