org.exolab.adaptx.xpath.functions

Class CountFunctionCall

Implemented Interfaces:
Parameters, XPathExpression

public class CountFunctionCall
extends FunctionCallImpl

A class that represents the XPath 1.0 "count" function call
Version:
$Revision: 3736 $ $Date: 2003-05-13 09:57:04 +0200 (Tue, 13 May 2003) $
Author:
Keith Visco

Field Summary

Fields inherited from class org.exolab.adaptx.xpath.functions.FunctionCallImpl

INVALID_NUMBER_PARAMS, INVALID_RESULT

Fields inherited from class org.exolab.adaptx.xpath.expressions.PrimaryExpr

EXPR, FUNCTION_CALL, LITERAL, NUMBER, VARIABLE_REFERENCE

Fields inherited from interface org.exolab.adaptx.xpath.XPathExpression

BOOLEAN, ERROR, FILTER_EXPR, LOCATION_PATH, NODE_TEST, NUMBER, PATH_EXPR, PRIMARY, STEP, STRING, UNION_EXPR

Constructor Summary

CountFunctionCall()
Creates a new CountFunctionCall Function Call

Method Summary

XPathResult
evaluate(XPathContext context)
Evaluates the expression and returns the XPath result.

Methods inherited from class org.exolab.adaptx.xpath.functions.FunctionCallImpl

addParameter, getFunctionName, getParameter, getParameterCount, toString

Methods inherited from class org.exolab.adaptx.xpath.expressions.FunctionCall

getFunctionName, getParameter, getParameterCount

Methods inherited from class org.exolab.adaptx.xpath.expressions.PrimaryExpr

getExprType, getType

Constructor Details

CountFunctionCall

public CountFunctionCall()
Creates a new CountFunctionCall Function Call

Method Details

evaluate

public XPathResult evaluate(XPathContext context)
            throws XPathException
Evaluates the expression and returns the XPath result.
Specified by:
evaluate in interface XPathExpression
Parameters:
context - The XPathContext to use during evaluation.
Returns:
The XPathResult (not null).
Throws:
XPathException - if an error occured while evaluating this expression.