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org.exolab.adaptx.xpath.engine

Class SelectExpr

Implemented Interfaces:
XPathExpression
public final class SelectExpr
extends java.lang.Object
implements XPathExpression
This class represents a SelectExpr 
 [1] SelectExpr ::= UnionExpr
Version:
$Revision: 3737 $ $Date: 2003-05-13 09:59:57 +0200 (Tue, 13 May 2003) $
Author:
Keith Visco

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

SelectExpr()
Creates a new SelectExpr.

Method Summary

XPathResult
evaluate(XPathContext context)
Evaluates the expression and returns the XPath result.
short
getExprType()
Returns the type of this expression.
UnionExpr
getUnionExpr()
String
toString()
Returns the XPath expression as a string.

Constructor Details

SelectExpr

public SelectExpr()
Creates a new SelectExpr. This SelectExpr will select the empty node set by default.

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.

getExprType

public short getExprType()
Returns the type of this expression.
Specified by:
getExprType in interface XPathExpression
Returns:
The type of this expression

getUnionExpr

public UnionExpr getUnionExpr()

toString

public String toString()
Returns the XPath expression as a string. The returned value is a valid XPath expression that can be parsed into an equivalent XPathExpression object.
Specified by:
toString in interface XPathExpression
Returns:
The XPath expression as a string

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