com.novell.xml.xpath
Class FilterExpr

java.lang.Object
  com.novell.xml.xpath.NodeSetExpr
      com.novell.xml.xpath.FilterExpr

All Implemented Interfaces:

Expression

public class FilterExpr

extends NodeSetExpr

implements Expression

This class implements the functionality of an XPath FilterExpr production.

Constructor Summary

FilterExpr(Expression expr, Predicate predicate)
Construct a FilterExpr from an arbitrary node-set expression and a predicate

Method Summary

ExpressionValue	evaluate(Node contextNode, ExpressionContext context) Evaluate the expression with repect to the passed context
String	toString() Provide a readable description for debugging.

Methods inherited from class com.novell.xml.xpath.NodeSetExpr

dump, getResultType, isConstant, registerForReset

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.novell.xml.xpath.Expression

dump, getResultType, isConstant, registerForReset

Constructor Detail

FilterExpr

public FilterExpr(Expression expr,
                  Predicate predicate)

Construct a FilterExpr from an arbitrary node-set expression and a predicate

Parameters:

expr - An arbitrary expression that results in a node-set

predicate - A predicate to filter the expression node-set

Method Detail

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