/*
* 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.data.store;
import java.io.IOException;
import java.util.Collection;
import java.util.Iterator;
import org.geotools.geometry.jts.ReferencedEnvelope;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import com.vividsolutions.jts.geom.Envelope;
public class EmptyFeatureCollection extends DataFeatureCollection {
/**
* null bounds
*/
static ReferencedEnvelope bounds = new ReferencedEnvelope(new Envelope(),null);
static {
bounds.setToNull();
}
public EmptyFeatureCollection( SimpleFeatureType schema ) {
super(null,schema);
}
public ReferencedEnvelope getBounds() {
return bounds;
}
public int getCount() throws IOException {
return 0;
}
protected Iterator openIterator() {
return new EmptyIterator();
}
protected void closeIterator(Iterator close) {
//do nothing
}
//read only access
public boolean add(SimpleFeature object) {
return false;
}
public boolean remove(Object object) {
return false;
}
public boolean removeAll(Collection collection) {
return false;
}
public boolean isValid() {
return true;
}
}