de.terrestris.shogun.deserializer.GeometryDeserializer.java Source code

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Here is the source code for de.terrestris.shogun.deserializer.GeometryDeserializer.java

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/* Copyright (c) 2012-2014, terrestris GmbH & Co. KG
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * (This is the BSD 3-Clause, sometimes called 'BSD New' or 'BSD Simplified',
 * see http://opensource.org/licenses/BSD-3-Clause)
 */
package de.terrestris.shogun.deserializer;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.io.WKTReader;

/**
 *
 * Class responsible for deserializing a Geometry
 * Makes a JTS Geometry object out of an WKT String
 *
 * @author terrestris GmbH & Co. KG
 *
 */
public class GeometryDeserializer extends JsonDeserializer<Geometry> {

    /**
     * Overwrite the deserializer for WKT geometry strings
     */
    @Override
    public Geometry deserialize(JsonParser jsonParser, DeserializationContext context)
            throws JsonProcessingException {

        Geometry geom = null;

        try {
            geom = new WKTReader().read(jsonParser.getText());
            if (geom != null) {
                //TODO: set the SRID dynamically
                geom.setSRID(900913);
            }
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }

        return geom;
    }

}