Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * 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 3

 * 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.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

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

import java.util.List;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.feature.exception.FeatureIndexException;

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

import org.gvsig.fmap.dal.feature.spi.index.AbstractFeatureIndexProvider;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.primitive.Envelope;

import java.util.Iterator;

import org.apache.commons.collections4.IteratorUtils;

import org.gvsig.fmap.geom.SpatialIndex;

public class GeometryIndexProvider extends AbstractFeatureIndexProvider {

        private SpatialIndex index = null;

        public GeometryIndexProvider() {

        }

    @Override

    public void initialize() {

    }

    protected Envelope getEnvelope(Object value) {

        Envelope env = null;

        if (value instanceof Envelope) {

            env = (Envelope) value;

        } else

            if (value instanceof Geometry) {

                env = ((Geometry) value).getEnvelope();

            }

        return env;

    }

    @Override

    public void insert(Object value, FeatureReferenceProviderServices fref) {

        this.index.insert(getEnvelope(value), fref);

    }

    @Override

    public void delete(Object value, FeatureReferenceProviderServices fref) {

        this.index.remove(getEnvelope(value), fref);

    }

    @Override

    public List match(Object value) throws FeatureIndexException {

        return this.index.queryAsList(getEnvelope(value));

    }

    @Override

    public List nearest(int count, Object value) {

        if( !this.index.getFactory().isNearestQuerySupported() ) {

            throw new UnsupportedOperationException();

        }

        if (value == null) {

            throw new IllegalArgumentException("value is null");

        }

        Iterator x = this.index.queryNearest(getEnvelope(value), count);

        return IteratorUtils.toList(x);

    }

    @Override

    public boolean isMatchSupported() {

        return true;

    }

    @Override

    public boolean isNearestSupported() {

        return this.index.getFactory().isNearestQuerySupported();

    }

    @Override

    public boolean isNearestToleranceSupported() {

        return false;

    }

    @Override

    public boolean isRangeSupported() {

        return false;

    }

    @Override

    public List nearest(int count, Object value, Object tolerance)

        throws FeatureIndexException {

        throw new UnsupportedOperationException();

    }

    @Override

    public List range(Object value1, Object value2)

        throws FeatureIndexException {

        throw new UnsupportedOperationException();

    }

    @Override

    public void clear() throws DataException {

        this.index.removeAll();

    }

 }