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RDF2go is an implementation-independent Java API with the design goals: portability (hence the name), performance and ease of implementation. This project was started at FZI Forschungszentrum Informatik Karlsruhe, Germany - www.fzi.de

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/**
 * LICENSE INFORMATION
 *
 * Copyright 2005-2008 by FZI (http://www.fzi.de).
 * Licensed under a BSD license (http://www.opensource.org/licenses/bsd-license.php)
 *  = Max Völkel
 *  = FZI Forschungszentrum Informatik Karlsruhe, Karlsruhe, Germany
 *  = 2010
 *
 * Further project information at http://semanticweb.org/wiki/RDF2Go
 */

package org.ontoware.rdf2go.util.transform;

import java.util.Map;

import org.ontoware.aifbcommons.collection.ClosableIterator;
import org.ontoware.rdf2go.RDF2Go;
import org.ontoware.rdf2go.model.DiffReader;
import org.ontoware.rdf2go.model.Model;
import org.ontoware.rdf2go.model.Statement;
import org.ontoware.rdf2go.model.impl.DiffImpl;
import org.ontoware.rdf2go.model.node.URI;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class InferenceRule implements TransformerRule {

	private static Logger log = LoggerFactory.getLogger(InferenceRule.class);
	
	String search, add;

	public InferenceRule(String search, String add) {
		super();
		this.search = search;
		this.add = add;
	}

	public String getSearch() {
		return this.search;
	}

	public String getAdd() {
		return this.add;
	}

	@Override
    public void applyRule(Model model, Map namespaceMap) {

		Model removeModel = RDF2Go.getModelFactory().createModel();
		removeModel.open();

		Model addModel = RDF2Go.getModelFactory().createModel();
		addModel.open();

		String query = Transformer.toSparqlConstruct(namespaceMap, this.add, this.search);

		ClosableIterator it = model.sparqlConstruct(query)
				.iterator();
		while (it.hasNext()) {
			Statement stmt = it.next();
			log.trace("rule infers    "+stmt);
			addModel.addStatement(stmt);
		}
		it.close();

		DiffReader diff = new DiffImpl(addModel.iterator(), removeModel.iterator());
		addModel.close();
		removeModel.close();
		model.update(diff);
	}

}