de.uniwue.dmir.heatmap.point.sources.geo.datasources.RTreeGeoDatasource.java Source code

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Here is the source code for de.uniwue.dmir.heatmap.point.sources.geo.datasources.RTreeGeoDatasource.java

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/**
 * Heatmap Framework - Core
 *
 * Copyright (C) 2013   Martin Becker
 *                   becker@informatik.uni-wuerzburg.de
 *
 * 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, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 */
package de.uniwue.dmir.heatmap.point.sources.geo.datasources;

import java.util.List;

import org.springframework.util.StopWatch;

import com.newbrightidea.util.RTree;

import de.uniwue.dmir.heatmap.point.sources.geo.GeoBoundingBox;
import de.uniwue.dmir.heatmap.point.sources.geo.GeoCoordinates;
import de.uniwue.dmir.heatmap.point.sources.geo.IGeoDatasource;
import de.uniwue.dmir.heatmap.util.mapper.IMapper;

public class RTreeGeoDatasource<TData> extends AbstractCachedGeoDatasource<TData> {

    private IMapper<TData, GeoCoordinates> mapper;
    private RTree<TData> rtree;

    public RTreeGeoDatasource(IGeoDatasource<TData> dataSource, IMapper<TData, GeoCoordinates> mapper) {

        super(dataSource);
        this.mapper = mapper;

        this.rtree = new RTree<TData>();

        this.reload();
    }

    @Override
    public List<TData> getData(GeoBoundingBox geoBoundingBox) {

        double minLon;
        double minLat;

        double maxLon;
        double maxLat;

        if (geoBoundingBox == null) {

            minLon = -180;
            minLat = -90;

            maxLon = +180;
            maxLat = +90;

        } else {

            minLon = geoBoundingBox.getMin().getLongitude();
            minLat = geoBoundingBox.getMin().getLatitude();

            maxLon = geoBoundingBox.getMax().getLongitude();
            maxLat = geoBoundingBox.getMax().getLatitude();

        }

        List<TData> data = this.rtree.search(new float[] { (float) minLon, (float) minLat, },
                new float[] { (float) (maxLon - minLon), (float) (maxLat - minLat) });

        return data;
    }

    @Override
    public void reload() {

        this.rtree.clear();

        StopWatch stopWatch = new StopWatch();
        stopWatch.start("getting data");

        List<TData> data = super.dataSource.getData(null);

        stopWatch.stop();
        super.logger.debug("getting data - count: {}", data.size());
        super.logger.debug("getting data - time: {}", stopWatch.toString());

        stopWatch.start("adding data");

        for (TData s : data) {
            GeoCoordinates geoCoordinates = this.mapper.map(s);
            this.rtree.insert(
                    new float[] { (float) geoCoordinates.getLongitude(), (float) geoCoordinates.getLatitude() }, s);
        }

        stopWatch.stop();
        super.logger.debug("building r-tree: {}", stopWatch.toString());
    }

}