/*
* This file is part of the GeoLatte project.
*
* GeoLatte is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GeoLatte 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with GeoLatte. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright (C) 2010 - 2010 and Ownership of code is shared by:
* Qmino bvba - Romeinsestraat 18 - 3001 Heverlee (http://www.qmino.com)
* Geovise bvba - Generaal Eisenhowerlei 9 - 2140 Antwerpen (http://www.geovise.com)
*/
package org.geolatte.common.cql;
import org.geolatte.common.transformer.Transformation;
import org.geolatte.common.transformer.TransformationException;
import java.text.ParseException;
/**
* <p>
* A {@link org.geolatte.common.transformer.Transformation} that applies a cql filter to its input object and returns a Boolean indicating whether the input passed the filter.
* </p>
* <p>
* <i>Creation-Date</i>: 01-Jul-2010<br>
* <i>Creation-Time</i>: 11:08:26<br>
* </p>
*
* @author Bert Vanhooff
* @author <a href="http://www.qmino.com">Qmino bvba</a>
* @since SDK1.5
*/
public class CqlFilterTransformation<T> implements Transformation<T, Boolean> {
private CqlFilter cqlFilter;
/**
* Initializes a <pre>CQLFilterTransformation</pre> using the given cql expression
* @param cqlExpression The cql expression
* @throws java.text.ParseException When the given cqlExpression could not be parsed.
*/
public CqlFilterTransformation(String cqlExpression) throws ParseException {
cqlFilter = Cql.toFilter(cqlExpression);
}
/**
* Checks whether the given input object passes the cql filter.
*
* @param input The object to evaluate
* @return True if the given object passes the cql filter, false otherwise.
*/
public Boolean transform(T input) throws TransformationException {
try {
return cqlFilter.evaluate(input);
}
catch (ParseException e) {
throw new TransformationException(e, input);
}
}
}