| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * 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 General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 

 * MA  02110-1301, USA.

 * 

 */

/*

 * AUTHORS (In addition to CIT):

 * 2008 {{Company}}   {{Task}}

 */

package org.gvsig.fmap.dal.feature;

import java.util.Iterator;

import org.gvsig.fmap.dal.feature.spi.FeatureSetProvider;

import org.gvsig.tools.evaluator.Evaluator;

public interface FeatureIndexes {

        /**

         * Returns a FeatureIndex given the name with which it was created.

         * 

         * @param name FeatureIndex name

         * 

         * @return FeatureIndex or null if it is not found.

         */

        public FeatureIndex getFeatureIndex(String name);

        /**

         * Using the given evaluator attributes, choose and use an appropriate index 

         * to obtain a FeatureSetProvider. If no index can be applied, then this method returns null

         * 

         * @param evaluator

         * @return FeatureSetProvider or null if could not find any appropriate index.

         * 

         */

        public FeatureSetProvider getFeatureSet(Evaluator evaluator);        

        /**

         * Returns an iterator over the indexes. Elements are of type FeatureIndex.

         * 

         * @return Iterator over the FeatureIndex(es).

         */

        public Iterator iterator();

}