/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2007-2008, 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.caching;
import org.geotools.caching.spatialindex.Data;
import org.geotools.caching.spatialindex.Node;
import org.geotools.caching.spatialindex.Visitor;
import org.geotools.data.simple.SimpleFeatureCollection;
import org.geotools.feature.DefaultFeatureCollection;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
/**
* A visitor that collects features into
* a In-Memory FeatureCollection
*
*
*
*
*
* @source $URL$
*/
public class FeatureCollectingVisitor implements Visitor {
SimpleFeatureCollection fc;
int visited_nodes = 0;
public FeatureCollectingVisitor(SimpleFeatureType type) {
fc = new DefaultFeatureCollection("FeatureCollectingVisitor", type);
}
/**
* @param d Must be a SimpleFeature
*/
public void visitData(Data<?> d) {
fc.add((SimpleFeature) d.getData());
}
public void visitNode(Node n) {
visited_nodes++;
}
/**
* @return the collection of features visited
*/
public SimpleFeatureCollection getCollection() {
return fc;
}
/**
* @return the number of nodes visited
*/
public int getVisitedNodes() {
return visited_nodes;
}
/**
* @returns true as this feature collection does something with the data it visits
*/
public boolean isDataVisitor() {
return true;
}
}