Application: gvSIG desktop

/* 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.

 *

 */

package org.gvsig.fmap.dal.feature.impl.featureset;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.dal.feature.FeatureSet;

import org.gvsig.tools.dispose.DisposableIterator;

import org.gvsig.tools.dynobject.DynObject;

import org.gvsig.tools.dynobject.DynObjectSet;

/**

 * {@link DynObject} implementation to facade a iterator of a {@link FeatureSet}

 * and allow to be used as a {@link DynObjectSet} iterator.

 * 

 * @author gvSIG Team

 * @version $Id$

 * 

 */

public class DynObjectIteratorFeatureIteratorFacade implements

    DisposableIterator {

    private final DisposableIterator featureIterator;

    private DynObjectFeatureFacade featureFacade;

    /**

     * Creates a new DynObjects iterator facade over a feature iterator.

     * Each {@link Feature} will be returned through a new or reused

     * {@link DynObjectFeatureFacade} which allows the {@link Feature} to be

     * used like a DynObject.

     * 

     * @param featureIterator

     *            to facade

     * @param featureFacade

     *            if not null this object will be reused as the facade for the

     *            Feature objects of the feature iterator

     */

    public DynObjectIteratorFeatureIteratorFacade(

        DisposableIterator featureIterator, DynObjectFeatureFacade featureFacade) {

        this.featureIterator = featureIterator;

        this.featureFacade = featureFacade;

    }

    /**

     * Creates a new DynObjects iterator facade over a feature iterator.

     * Each {@link Feature} will be returned through a new

     * {@link DynObjectFeatureFacade} which allows the {@link Feature} to be

     * used like a DynObject.

     * 

     * @param featureIterator

     *            to facade

     */

    public DynObjectIteratorFeatureIteratorFacade(

        DisposableIterator featureIterator) {

        this.featureIterator = featureIterator;

    }

    public void dispose() {

        featureIterator.dispose();

    }

    public boolean hasNext() {

        return featureIterator.hasNext();

    }

    public Object next() {

        Feature feature = (Feature) featureIterator.next();

        if (featureFacade == null) {

                featureFacade = new DynObjectFeatureFacade();

        }

        featureFacade.setFeatureCopy(feature);

        return featureFacade;

    }

    public void remove() {

        featureIterator.remove();

    }

}