/*****************************************************************************
* *
* This file is part of the BeanShell Java Scripting distribution. *
* Documentation and updates may be found at http://www.beanshell.org/ *
* *
* Sun Public License Notice: *
* *
* The contents of this file are subject to the Sun Public License Version *
* 1.0 (the "License"); you may not use this file except in compliance with *
* the License. A copy of the License is available at http://www.sun.com *
* *
* The Original Code is BeanShell. The Initial Developer of the Original *
* Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright *
* (C) 2000. All Rights Reserved. *
* *
* GNU Public License Notice: *
* *
* Alternatively, the contents of this file may be used under the terms of *
* the GNU Lesser General Public License (the "LGPL"), in which case the *
* provisions of LGPL are applicable instead of those above. If you wish to *
* allow use of your version of this file only under the terms of the LGPL *
* and not to allow others to use your version of this file under the SPL, *
* indicate your decision by deleting the provisions above and replace *
* them with the notice and other provisions required by the LGPL. If you *
* do not delete the provisions above, a recipient may use your version of *
* this file under either the SPL or the LGPL. *
* *
* Patrick Niemeyer ([email protected]) *
* Author of Learning Java, O'Reilly & Associates *
* http://www.pat.net/~pat/ *
* *
*****************************************************************************/
package bsh;
/**
UtilEvalError is an error corresponding to an EvalError but thrown by a
utility or other class that does not have the caller context (Node)
available to it. A normal EvalError must supply the caller Node in order
for error messages to be pinned to the correct line and location in the
script. UtilEvalError is a checked exception that is *not* a subtype of
EvalError, but instead must be caught and rethrown as an EvalError by
the a nearest location with context. The method toEvalError( Node )
should be used to throw the EvalError, supplying the node.
<p>
To summarize: Utilities throw UtilEvalError. ASTs throw EvalError.
ASTs catch UtilEvalError and rethrow it as EvalError using
toEvalError( Node ).
<p>
Philosophically, EvalError and UtilEvalError corrospond to
RuntimeException. However they are constrained in this way in order to
add the context for error reporting.
@see UtilTargetError
*/
public class UtilEvalError extends Exception
{
protected UtilEvalError() {
}
public UtilEvalError( String s ) {
super(s);
}
/**
Re-throw as an eval error, prefixing msg to the message and specifying
the node. If a node already exists the addNode is ignored.
@see #setNode( bsh.SimpleNode )
<p>
@param msg may be null for no additional message.
*/
public EvalError toEvalError(
String msg, SimpleNode node, CallStack callstack )
{
if ( Interpreter.DEBUG )
printStackTrace();
if ( msg == null )
msg = "";
else
msg = msg + ": ";
return new EvalError( msg+getMessage(), node, callstack );
}
public EvalError toEvalError ( SimpleNode node, CallStack callstack )
{
return toEvalError( null, node, callstack );
}
}
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