GeometryDeserializer.java

/* Copyright (c) 2012-2014, terrestris GmbH & Co. KG
 * All rights reserved.
 *
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 *    and/or other materials provided with the distribution.
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * 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;
	}

}