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.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

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 Map<String, Boolean> enabledContexts;

    private boolean enabled = false;

    public SpatialCache() {

        enabledContexts = new HashMap<>();

        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 removeAll() {

        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() {

        if (enabled) {

            return true;

        }

        for (Boolean value : this.enabledContexts.values()) {

            if (value) {

                return true;

            }

        }

        return false;

    }

    public boolean isEnabled(String contextId) {

        return this.enabledContexts.getOrDefault(contextId, false);

    }

    public void setEnabled(boolean enabled) {

        this.enabled = enabled;

    }

    public void setEnabled(String contextId, boolean enabled) {

        this.enabledContexts.put(contextId, enabled);

    }

    public boolean isOverflown() {

        return overflown;

    }

    public boolean isContextEnabled() {

        for (Boolean value : this.enabledContexts.values()) {

            if (value) {

                return true;

            }

        }

        return false;

    }

}