org.deegree.feature.xpath
Class FeatureXPath

java.lang.Object
  org.jaxen.BaseXPath
      org.deegree.feature.xpath.FeatureXPath

All Implemented Interfaces:

Serializable, org.jaxen.XPath

public class FeatureXPath
extends org.jaxen.BaseXPath

Jaxen XPath implementation for Feature objects.

This is the entry point for matching an XPath expression against a Feature. Let fc be a FeatureCollection that you want to match against. Create a compiled XPath object, then match it against one or more context nodes using the BaseXPath.selectNodes(Object) method, as in the following example (which features the infamous Philosoper feature type):

 XPath xpath = new FeatureXPath( "gml:featureMember/app:Philosopher/app:friend/app:Philosopher//app:name" );
 xpath.setNamespaceContext( nsContext );
 List<?> selectedNodes = xpath.selectNodes( new FeatureNode( null, fc ) );
 

Version:

$Revision:$, $Date:$

Author:

Markus Schneider , last edited by: $Author:$

See Also:

GMLObjectNode, Serialized Form

Constructor Summary

FeatureXPath(String xpathExpr, Feature rootFeature, GMLVersion version)
Create a new FeatureXPath from an XPath expression string.

Method Summary

Methods inherited from class org.jaxen.BaseXPath

addNamespace, booleanValueOf, createFunctionContext, createNamespaceContext, createVariableContext, debug, evaluate, getContext, getContextSupport, getFunctionContext, getNamespaceContext, getNavigator, getRootExpr, getVariableContext, numberValueOf, selectNodes, selectNodesForContext, selectSingleNode, selectSingleNodeForContext, setFunctionContext, setNamespaceContext, setVariableContext, stringValueOf, toString, valueOf

Methods inherited from class java.lang.Object

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

Constructor Detail

FeatureXPath

public FeatureXPath(String xpathExpr,
                    Feature rootFeature,
                    GMLVersion version)
             throws org.jaxen.JaxenException

Create a new FeatureXPath from an XPath expression string.

Parameters:

xpathExpr - the XPath expression

rootFeature - root of the navigation hierarchy (document node)

version - determines the names and types of the standard GML properties, can be null (if no properties such as "gml:name" are used)

Throws:

org.jaxen.JaxenException - if there is a syntax error in the expression