de.ifgi.fmt.mongo.conv.PointConverter.java Source code

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Here is the source code for de.ifgi.fmt.mongo.conv.PointConverter.java

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/*
 * Copyright (C) 2012  Christian Autermann, Dustin Demuth, Maurin Radtke
 *
 * 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 de.ifgi.fmt.mongo.conv;

import java.awt.geom.Point2D;

import com.google.code.morphia.converters.SimpleValueConverter;
import com.google.code.morphia.converters.TypeConverter;
import com.google.code.morphia.mapping.MappedField;
import com.google.code.morphia.mapping.MappingException;
import com.mongodb.BasicDBList;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.Point;

/**
 * 
 * @author Autermann, Demuth, Radtke
 */
@SuppressWarnings("rawtypes")
public class PointConverter extends TypeConverter implements SimpleValueConverter {
    private GeometryFactory f = new GeometryFactory();

    /**
     * 
     */
    public PointConverter() {
        super(Point.class);
    }

    /**
     * 
     * @param value
     * @param optionalExtraInfo
     * @return
     */
    @Override
    public Object encode(Object value, MappedField optionalExtraInfo) {
        if (value == null)
            return null;
        Point p = (Point) value;
        BasicDBList l = new BasicDBList();
        l.add(p.getCoordinate().x);
        l.add(p.getCoordinate().y);
        return l;
    }

    /**
     * 
     * @param c
     * @param o
     * @param i
     * @return
     * @throws MappingException
     */
    @Override
    public Point decode(Class c, Object o, MappedField i) throws MappingException {
        Point p = null;
        if (o == null) {
            return null;
        } else if (o instanceof Point) {
            return (Point) o;
        } else if (o instanceof Point2D) {
            Point2D a = (Point2D) o;
            p = f.createPoint(new Coordinate(a.getX(), a.getY()));
        } else if (o instanceof double[]) {
            double[] a = (double[]) o;
            p = f.createPoint(new Coordinate(a[0], a[1]));
        } else if (o instanceof BasicDBList) {
            BasicDBList list = (BasicDBList) o;
            p = f.createPoint(new Coordinate((Double) list.get(0), (Double) list.get(1)));
        } else {
            throw new RuntimeException("Can not decode " + o.getClass().toString());
        }
        p.setSRID(4326);
        return p;
    }

}