/*
 * $Id$
 *
 * Copyright (C) INRIA, 2011
 *
 * Modifications to the initial code base are copyright of their
 * respective authors, or their employers as appropriate.  Authorship
 * of the modifications may be determined from the ChangeLog placed at
 * the end of this file.
 *
 * This program 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 program 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 program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 */

package org.ontologymatching.book;

// Alignment API classes
import org.semanticweb.owl.align.Cell;
import org.semanticweb.owl.align.Alignment;
import org.semanticweb.owl.align.AlignmentException;
import org.semanticweb.owl.align.AlignmentProcess;

// Alignment API implementation classes
import fr.inrialpes.exmo.align.impl.ObjectAlignment;

// Java standard classes
import java.util.Properties;

/**
 * ComposedAlignment
 *
 * Solves the C.10 exercise of the book by assembling matchers.
 * In fact, most of it has been done, it is only necessary to
 * - run AggregateAlignment on the ontologies
 * - extract an alignment from this
 * The second is achieved by using ExtractAlignment however, this
 * is in fact not necessary because, ExtractAlignment is a simple
 * subclass of DistanceAlignment, that AggregateAlignment is too.
 */

public class ComposedAlignment extends ObjectAlignment implements AlignmentProcess {

    AggregateAlignment matcher = null;
    ExtractAlignment extractor = null;

    /** Creation **/
    public ComposedAlignment() {
	matcher = new AggregateAlignment();
	extractor = new ExtractAlignment();
	setType("**");
    }

    public void init( Object onto1, Object onto2 ) throws AlignmentException {
	super.init( onto1, onto2 );
	matcher.init( this.onto1, this.onto2 );
	extractor.init( this.onto1, this.onto2 );
    }

    /** Processing */ 
    public void align( Alignment alignment, Properties params ) throws AlignmentException {
	// Call AggregateAlignment
	matcher.align( alignment, params );

	// Call ExtractAlignment... that only do extraction from matcher
	extractor.align( matcher, params );

	// Extract alignment
	for ( Cell c : extractor ) {
	    // copy the cell...
	    addCell( c );
	}
    }

}