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.mapcontext.layers;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.SpatialIndex;

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

import org.gvsig.tools.visitor.Visitor;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

public class SpatialCache  {

    private static final Logger logger = LoggerFactory.getLogger(SpatialCache.class);

    private int maxFeatures = 1000; // Por defecto, pero se puede cambiar

        private int fastNumTotalRegs=0;

        private SpatialIndex index = null;

        private boolean overflown = false;

        private boolean enabled = false;

        public SpatialCache() {

                try {

                        this.index = GeometryLocator.getGeometryManager().createDefaultMemorySpatialIndex();

                } catch (Exception e) {

                        logger.info("Can't create spatial index", e);

                }

        }

        public int getMaxFeatures() {

                return maxFeatures;

        }

        public void setMaxFeatures(int maxFeatures) {

                this.maxFeatures = maxFeatures;

        }

        public synchronized void insert(Envelope bounds, Geometry geom) {

                if (isEnabled()) {

                    if (getMaxFeatures() >= size()) {

                        this.index.insert(bounds, geom);

                        fastNumTotalRegs++;

                    } else {

                        overflown = true;

                    }

                }

        }

        public synchronized void query(Envelope searchEnv, Visitor visitor)

        {

                this.index.query(searchEnv, visitor);

        }

        public synchronized List query(Envelope searchEnv)

        {

                List result = new ArrayList();

                Iterator it = index.query(searchEnv);

                while( it.hasNext() ) {

                        result.add( it.next());

                }

                return result;

        }

        public void insert(Envelope itemEnv, Object item) {

                if (isEnabled()) {

                    if (getMaxFeatures() >= size()) {

                        this.index.insert(itemEnv, item);

                        fastNumTotalRegs++;

                    } else {

                        overflown = true;

                    }

                }

        }

        public boolean remove(Envelope itemEnv, Object item) {

                boolean resul = this.index.remove(itemEnv,item);

                if (resul)

                        fastNumTotalRegs--;

                return resul;

        }

        public int size() {

                return fastNumTotalRegs;

        }

        public void clearAll() {

                index.removeAll();

                fastNumTotalRegs = 0;

                overflown = false;

        }

        public void remove(org.gvsig.fmap.geom.primitive.Envelope bounds, Geometry geom) {

        index.remove(bounds, geom);

        }

        public boolean isEnabled() {

                return enabled;

        }

        public void setEnabled(boolean enabled) {

                this.enabled = enabled;

        }

        public boolean isOverflown() {

            return overflown;

        }

}