/*
* $Header$
* $Revision: 982 $
* $Date: 2006-12-08 18:42:51 +1000 (Fri, 08 Dec 2006) $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2003-2009 The JRDF Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* the JRDF Project (http://jrdf.sf.net/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The JRDF Project" and "JRDF" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, please contact
* newmana@users.sourceforge.net.
*
* 5. Products derived from this software may not be called "JRDF"
* nor may "JRDF" appear in their names without prior written
* permission of the JRDF Project.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the JRDF Project. For more
* information on JRDF, please see <http://jrdf.sourceforge.net/>.
*
*/
package org.jrdf.graph.global.molecule.mem;
import org.jrdf.graph.BlankNode;
import org.jrdf.graph.ObjectNode;
import org.jrdf.graph.PredicateNode;
import org.jrdf.graph.SubjectNode;
import org.jrdf.graph.Triple;
import org.jrdf.graph.TripleImpl;
import org.jrdf.graph.global.molecule.MergeSubmolecules;
import org.jrdf.graph.global.molecule.Molecule;
import org.jrdf.graph.global.molecule.MoleculeFactory;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class LocalMergeSubmoleculesImpl implements LocalMergeSubmolecules {
private final MergeSubmolecules merger;
private final MoleculeFactory moleculeFactory;
private Map<BlankNode, BlankNode> map;
public LocalMergeSubmoleculesImpl(MergeSubmolecules newMerger, MoleculeFactory newMoleculeFactory) {
this.merger = newMerger;
this.moleculeFactory = newMoleculeFactory;
}
public Molecule merge(Molecule molecule1, Molecule molecule2, Map<BlankNode, BlankNode> newMap) {
if (!newMap.isEmpty()) {
this.map = newMap;
return merger.merge(convertMolecule(molecule1), convertMolecule(molecule2));
} else {
return null;
}
}
private Molecule convertMolecule(Molecule molecule) {
final Molecule newMolecule = convertRootTriples(molecule);
final Iterator<Triple> triples = molecule.getRootTriples();
while (triples.hasNext()) {
final Triple triple = triples.next();
final Set<Molecule> moleculeSet = molecule.getSubMolecules(triple);
for (final Molecule subMolecule : moleculeSet) {
final Molecule convertedSubMolecule = convertMolecule(subMolecule);
newMolecule.add(convertTriple(triple), convertedSubMolecule);
}
}
return newMolecule;
}
private Molecule convertRootTriples(Molecule molecule) {
Set<Triple> triples = new HashSet<Triple>();
final Iterator<Triple> iterator = molecule.getRootTriples();
while (iterator.hasNext()) {
final Triple triple = iterator.next();
triples.add(convertTriple(triple));
}
return moleculeFactory.createMolecule(triples);
}
private Triple convertTriple(Triple triple) {
SubjectNode subject = triple.getSubject();
PredicateNode predicate = triple.getPredicate();
ObjectNode object = triple.getObject();
if (map.containsKey(subject)) {
subject = map.get(subject);
}
if (map.containsKey(object)) {
object = map.get(object);
}
return new TripleImpl(subject, predicate, object);
}
}