/**
* Copyright (c) 2013, Institute of Information Systems (Sven Groppe and contributors of LUPOSDATE), University of Luebeck
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* - 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.
* - Neither the name of the University of Luebeck 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.
*/
package lupos.geo.stsparql.functions.construction;
import com.vividsolutions.jts.geom.Geometry;
import lupos.datastructures.items.literal.LiteralFactory;
import lupos.engine.operators.singleinput.filter.expressionevaluation.EvaluationVisitorImplementation;
import lupos.engine.operators.singleinput.filter.expressionevaluation.ExternalFunction;
import lupos.engine.operators.singleinput.filter.expressionevaluation.Helper;
import lupos.engine.operators.singleinput.TypeErrorException;
import lupos.geo.GeoHelper;
import lupos.geo.serializer.StSPARQLSerializer;
/**
* Richard Mietz
* Date: 20.02.13
*/
public class Buffer implements ExternalFunction
{
@Override
public Object evaluate(Object[] args) throws TypeErrorException
{
if(args.length==2)
{
Geometry geo1 = GeoHelper.getStSPARQLGeometry(args[0]);
double distance = Helper.getDouble(args[1]);
Geometry buffer = geo1.buffer(distance);
return new StSPARQLSerializer().toLiteral(buffer);
}
else
{
throw new TypeErrorException("Buffer Function expects exactly 2 arguments: two geometry objects.");
}
}
public static void register(){
EvaluationVisitorImplementation.registerExternalFunction(LiteralFactory.createURILiteralWithoutLazyLiteralWithoutException("<" + GeoHelper.stSPARQLFunctionUri + "buffer>"), new Buffer());
}
}