/*
* 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.grid.spatialindex.store;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Properties;
import org.geotools.caching.spatialindex.Node;
import org.geotools.caching.spatialindex.NodeIdentifier;
import org.geotools.caching.spatialindex.SpatialIndex;
import org.geotools.caching.spatialindex.Storage;
import org.geotools.geometry.jts.ReferencedEnvelope;
import org.opengis.feature.type.FeatureType;
/**
* A simple in-memory storage relying on LinkedHashMap.
*
* @author crousson
*
*
* @source $URL$
*/
public class MemoryStorage implements Storage {
private HashMap<NodeIdentifier, Node> map;
private ArrayList<FeatureType> featureTypes = null;
private ReferencedEnvelope bounds = null;
private MemoryStorage() {
this.map = new HashMap<NodeIdentifier, Node>();
featureTypes = new ArrayList<FeatureType>();
}
public static Storage createInstance(Properties pset) {
return new MemoryStorage();
}
public static Storage createInstance() {
return new MemoryStorage();
}
public Node get(NodeIdentifier id) {
return map.get(id);
}
public void put(Node n) {
if (!map.containsKey(n.getIdentifier())) {
map.put(n.getIdentifier(), n);
}
}
public void remove(NodeIdentifier id) {
map.remove(id);
}
public void clear() {
map.clear();
}
public void setParent(SpatialIndex index) {
// do nothing - we do not need back link for this storage
}
public void flush() {
// do nothing
}
public void dispose(){
clear();
}
public Properties getPropertySet() {
Properties pset = new Properties();
pset.setProperty(STORAGE_TYPE_PROPERTY, MemoryStorage.class.getCanonicalName());
return pset;
}
public NodeIdentifier findUniqueInstance(NodeIdentifier id) {
if (map.containsKey(id)) {
return map.get(id).getIdentifier();
} else {
return id;
}
}
public void addFeatureType( FeatureType ft ) {
featureTypes.add(ft);
}
public Collection<FeatureType> getFeatureTypes() {
return Collections.unmodifiableCollection(featureTypes);
}
public void clearFeatureTypes(){
featureTypes.clear();
}
public ReferencedEnvelope getBounds() {
return bounds;
}
public void setBounds( ReferencedEnvelope bounds ) {
this.bounds = bounds;
}
}