org.exolab.adaptx.xpath.engine

Class SelectExpr

java.lang.Object

org.exolab.adaptx.xpath.engine.SelectExpr

All 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 03:59:57 -0400 (Tue, 13 May 2003) $

Author:

Keith Visco

Field Summary

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

Constructors

Constructor and Description
SelectExpr() Creates a new SelectExpr.

Method Summary

Methods

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

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

SelectExpr

public SelectExpr()

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

Method Detail

toString

public java.lang.String toString()

Description copied from interface: XPathExpression

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

Overrides:

toString in class java.lang.Object

Returns:

The XPath expression as a string

getExprType

public short getExprType()

Description copied from interface: XPathExpression

Returns the type of this expression.

Specified by:

getExprType in interface XPathExpression

Returns:

The type of this expression

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.

getUnionExpr

public UnionExpr getUnionExpr()