com.novell.xsl.extensions
Class BadExpression

java.lang.Object
  com.novell.xsl.extensions.BadExpression

All Implemented Interfaces:

Expression

public class BadExpression

extends Object

implements Expression

Expression object used to wrap an error message so the error message isn't reported unless the expression is evaluated.

This is primarily useful for XSLT forwards-compatible parsing.

Constructor Summary

BadExpression(String message)
Construct a BadExpression instance with the passed error message.

Method Summary

void	dump(PrintWriter writer, int indent) Print the expression in a readable form for debugging.
ExpressionValue	evaluate(Node contextNode, ExpressionContext context) Evaluate the expression with repect to the passed context This will always throw an XPathEvaluationException
Class	getResultType() Return the Class object describing the result type of the expression.
boolean	isConstant() Return true if the expression is a constant value.
void	registerForReset(XPathResetRegistrar registrar) Register this expression or any subexpression that implements XPathResetCache with an object that wants to call resetCache()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BadExpression

public BadExpression(String message)

Construct a BadExpression instance with the passed error message.

Parameters:

message - The message that will be reported if this expression is instantiated.

Method Detail

evaluate

public ExpressionValue evaluate(Node contextNode,
                                ExpressionContext context)
                         throws XPathEvaluationException

Evaluate the expression with repect to the passed context This will always throw an XPathEvaluationException

Specified by:

evaluate in interface Expression

Parameters:

contextNode - context node for expression evaluation

context - expression context for expression evaluation

Returns:

result of evaluating expression

Throws:

XPathEvaluationException

isConstant

public boolean isConstant()

Return true if the expression is a constant value.

Specified by:

isConstant in interface Expression

Returns:

True is expression is constant, false otherwise.

getResultType

public Class getResultType()

Return the Class object describing the result type of the expression.

Specified by:

getResultType in interface Expression

Returns:

A Class object.

registerForReset

public void registerForReset(XPathResetRegistrar registrar)

Register this expression or any subexpression that implements XPathResetCache with an object that wants to call resetCache()

Specified by:

registerForReset in interface Expression

dump

public void dump(PrintWriter writer,
                 int indent)

Print the expression in a readable form for debugging.

Specified by:

dump in interface Expression

Parameters:

writer - The output device.

indent - Number of tabs to indent the result.