/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2002-2008, 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.jdbc;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.List;

/**
 * Executes a chain of {@link PrimaryKeyFinder} in the order they are defined
 * 
 * @author Andrea Aime - OpenGeo
 * 
 *
 * @source $URL: http://svn.osgeo.org/geotools/trunk/modules/library/jdbc/src/main/java/org/geotools/jdbc/CompositePrimaryKeyFinder.java $
 */
public class CompositePrimaryKeyFinder extends PrimaryKeyFinder {

    List<PrimaryKeyFinder> finders;

    public CompositePrimaryKeyFinder(PrimaryKeyFinder... finders) {
        this.finders = Arrays.asList(finders);
    }

    @Override
    public PrimaryKey getPrimaryKey(JDBCDataStore store, String schema, String table, Connection cx)
            throws SQLException {
        for (PrimaryKeyFinder finder : finders) {
            PrimaryKey pk = finder.getPrimaryKey(store, schema, table, cx);
            if (pk != null)
                return pk;
        }

        return null;
    }

}