com.novell.xsl.parser
Class AVT

java.lang.Object
  com.novell.xsl.parser.AVT

All Implemented Interfaces:

Expression

public class AVT

extends Object

implements Expression

A string expression used for an AttributeValueTemplate

Constructor Summary

protected

AVT(Expression[] operands) Constructs a new AttributeValueTemplate with the specified operands.

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
Expression[]	getOperands() Returns this expression's operands.
Class	getResultType() Return the Class object describing the result type of the expression.
boolean	isConstant() Return true if the expression is a constant value.
static Expression	parse(String source, Parser xpathParser, ErrorHandler errorHandler) Parse a string an as AttributeValueTemplate and return an Expression the implements the template.
void	registerForReset(XPathResetRegistrar registrar) Register this expression or any subexpression that implements XPathResetCache with an object that wants to call resetCache()
String	toString() Provide a readable description for debugging.

Methods inherited from class java.lang.Object

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

Constructor Detail

AVT

protected AVT(Expression[] operands)

Constructs a new AttributeValueTemplate with the specified operands.

Parameters:

operands - the expressions to be concatenated

Method Detail

parse

public static Expression parse(String source,
                               Parser xpathParser,
                               ErrorHandler errorHandler)
                        throws XPathParserException

Parse a string an as AttributeValueTemplate and return an Expression the implements the template.

Parameters:

source - The string to be parsed.

xpathParser - The XPath expression parser to use for parsing the expressions.

Returns:

An Object implementing Expression that implements the AVT. This might not be an AVT object.

Throws:

XPathParserException

getOperands

public Expression[] getOperands()

Returns this expression's operands.

Returns:

the expressions to be concatenated

toString

public String toString()

Provide a readable description for debugging.

Returns:

String representation

evaluate

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

Evaluate the expression with repect to the passed context

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.