org.apache.commons.jelly.expression.xpath
Class XPathExpression

java.lang.Object
  org.apache.commons.jelly.expression.ExpressionSupport
      org.apache.commons.jelly.expression.xpath.XPathExpression

All Implemented Interfaces:

Expression, org.jaxen.VariableContext

public class XPathExpression
extends ExpressionSupport
implements org.jaxen.VariableContext

An expression which returns an XPath object.

Version:

$Revision: 1807798 $

Author:

James Strachan

Field Summary

private JellyContext	context
private org.apache.commons.logging.Log	log The Log to which logging calls will be made.
private java.lang.String	text
private java.util.Map	uris
private Expression	xpathExpr

Fields inherited from class org.apache.commons.jelly.expression.ExpressionSupport

EMPTY_ITERATOR

Constructor Summary

XPathExpression()

XPathExpression(java.lang.String text, Expression xpathExpr, TagScript tagScript)

Method Summary

protected java.util.Map	createUriMap(java.util.Map namespaceContext) Factory method to create a synchronized Map of non-null and non-blank namespace prefixes to namespace URIs
java.lang.Object	evaluate(JellyContext context) Evaluates the expression with the given context and returns the result
java.lang.String	getExpressionText()
java.lang.Object	getVariableValue(java.lang.String namespaceURI, java.lang.String prefix, java.lang.String localName)
java.lang.String	toString()

Methods inherited from class org.apache.commons.jelly.expression.ExpressionSupport

evaluateAsBoolean, evaluateAsIterator, evaluateAsString, evaluateRecurse

Methods inherited from class java.lang.Object

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

Field Detail

log

private org.apache.commons.logging.Log log

The Log to which logging calls will be made.

text

private java.lang.String text

xpathExpr

private Expression xpathExpr

context

private JellyContext context

uris

private java.util.Map uris

Constructor Detail

XPathExpression

public XPathExpression()

XPathExpression

public XPathExpression(java.lang.String text,
                       Expression xpathExpr,
                       TagScript tagScript)

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getExpressionText

public java.lang.String getExpressionText()

Specified by:

getExpressionText in interface Expression

Returns:

the textual representation of this expression

evaluate

public java.lang.Object evaluate(JellyContext context)

Description copied from interface: Expression

Evaluates the expression with the given context and returns the result

Specified by:

evaluate in interface Expression

getVariableValue

public java.lang.Object getVariableValue(java.lang.String namespaceURI,
                                         java.lang.String prefix,
                                         java.lang.String localName)

Specified by:

getVariableValue in interface org.jaxen.VariableContext

createUriMap

protected java.util.Map createUriMap(java.util.Map namespaceContext)

Factory method to create a synchronized Map of non-null and non-blank namespace prefixes to namespace URIs