/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.xml.impl.jxpath;
import org.apache.commons.jxpath.ri.QName;
import org.apache.commons.jxpath.ri.model.NodePointer;
import org.opengis.feature.simple.SimpleFeatureType;
/**
* Pointer to a single attribute of a feature type.
*
* @author Justin Deoliveira, The Open Planning Project
*
*
* @source $URL$
*/
public class FeatureTypeAttributePointer extends NodePointer {
/**
* the feature type
*/
SimpleFeatureType featureType;
/**
* The parent pointer
*/
FeatureTypePointer parent;
/**
* the indedx of hte property being pointed at
*/
int index;
/**
* Creates the pointer.
*
* @param parent The parent pointer, pointer at the feature type.
* @param index The index of hte property to point to
*/
public FeatureTypeAttributePointer(FeatureTypePointer parent, int index) {
super(parent);
this.index = index;
this.featureType = (SimpleFeatureType) parent.getImmediateNode();
}
/**
* Return <code>true</code>.
*/
public boolean isLeaf() {
return true;
}
/**
* Return <code>false</code>.
*/
public boolean isCollection() {
return false;
}
/**
* Return <code>1</code>
*/
public int getLength() {
return 1;
}
/**
* Returns the qname with prefix as <code>null</code>, and local part the name of the
* feature attribute.
*/
public QName getName() {
return new QName(null, featureType.getDescriptor(index).getLocalName());
}
public Object getBaseValue() {
return featureType;
}
public Object getImmediateNode() {
return featureType.getDescriptor(index);
}
public void setValue(Object value) {
throw new UnsupportedOperationException("Feautre types are immutable");
}
/**
* Always return <code>0</code>, can never have child pointers.
*/
public int compareChildNodePointers(NodePointer pointer1, NodePointer pointer2) {
return 0;
}
}