/**
* File: $HeadURL: https://hdt-java.googlecode.com/svn/trunk/hdt-jena/src/org/rdfhdt/hdtjena/cache/DictionaryCacheArrayWeak.java $
* Revision: $Rev: 190 $
* Last modified: $Date: 2013-03-03 11:30:03 +0000 (dom, 03 mar 2013) $
* Last modified by: $Author: mario.arias $
*
* 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; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Contacting the authors:
* Mario Arias: mario.arias@deri.org
* Javier D. Fernandez: jfergar@infor.uva.es
* Miguel A. Martinez-Prieto: migumar2@infor.uva.es
*/
package org.rdfhdt.hdtjena.cache;
import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import org.apache.jena.graph.Node;
/**
* @author mario.arias
*
*/
public class DictionaryCacheArrayWeak implements DictionaryCache {
private Reference<Node>[] array;
@SuppressWarnings("unchecked")
public DictionaryCacheArrayWeak(int capacity) {
array = new Reference[capacity];
}
/* (non-Javadoc)
* @see hdt.jena.DictionaryNodeCache#getNode(int)
*/
@Override
public Node get(int id) {
Reference<Node> ref = array[id-1];
if(ref!=null) {
return ref.get();
}
return null;
}
public void put(int id, Node node) {
array[id-1] = new WeakReference<Node>(node);
}
@Override
public int size() {
// Can't estimate. We don't know how many the GC disposed.
return 0;
}
@Override
public void clear() {
// FIXME: Implement concurrency friendly.
}
}