/* * 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.expressions; import org.geolatte.common.transformer.Transformation; import org.geolatte.common.transformer.TransformationException; /** * <p> * A {@link org.geolatte.common.transformer.Transformation} that applies a {@link 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>: 15:13:32<br> * </p> * * @author Bert Vanhooff * @author <a href="http://www.qmino.com">Qmino bvba</a> * @since SDK1.5 * @param <T> The input type of this Transformation. */ public class FilterTransformation<T> implements Transformation<T, Boolean> { private Filter filter; /** * Initializes a <pre>FilterTransformation</pre> using the given {@link Filter}} * @param filter The filter to apply. If null, no filtering is done (every object passes). */ public FilterTransformation(Filter filter) { this.filter = filter; } public Boolean transform(T input) throws TransformationException { if (filter == null) return true; return filter.evaluate(input); } }