/*
* 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.filter.expression;
import org.geotools.factory.Hints;
import org.opengis.feature.Property;
import org.opengis.feature.type.Name;
/**
* This class will *directly* access a Property with the name equal to xpath.
*
* @author Jody Garnett
*
* @source $URL$
*/
public class DirectPropertyAccessorFactory implements PropertyAccessorFactory {
static PropertyAccessor DIRECT = new DirectPropertyAccessor();
public PropertyAccessor createPropertyAccessor(Class type, String xpath,
Class target, Hints hints) {
return DIRECT;
}
/**
* Grab a value from a Property with matching name.
* <p>
* This restriction is used by Types.validate to ensure
* the provided value is good.
*
* @author Jody Garnett (Refractions Research Inc)
*/
static class DirectPropertyAccessor implements PropertyAccessor {
/**
* We can handle *one* case and one case only
*/
public boolean canHandle(Object object, String xpath, Class target) {
if( object instanceof Property ){
Property property = (Property) object;
final Name name = property.getName();
if( name != null ){
return name.getLocalPart().equals( xpath );
} else {
// A property with no name? this is probably a place holder
// or Null Object (such as TransactionStateDiff.NULL).
return false;
}
}
return false;
}
public Object get(Object object, String xpath, Class target)
throws IllegalArgumentException {
return ((Property)object).getValue();
}
public void set(Object object, String xpath, Object value, Class target)
throws IllegalArgumentException {
((Property)object).setValue( value );
}
}
}