/* * The JTS Topology Suite is a collection of Java classes that * implement the fundamental operations required to validate a given * geo-spatial data set to a known topological specification. * * Copyright (C) 2001 Vivid Solutions * * This library 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 2.1 of the License, or (at your option) any later version. * * This library 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 this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * For more information, contact: * * Vivid Solutions * Suite #1A * 2328 Government Street * Victoria BC V8T 5G5 * Canada * * (250)385-6040 * www.vividsolutions.com */ package com.revolsys.geometry.test.function; import java.util.ArrayList; import java.util.List; import com.revolsys.geometry.model.Geometry; public class OverlayFunctions { public static Geometry clip(final Geometry a, final Geometry mask) { final List geoms = new ArrayList(); for (int i = 0; i < a.getGeometryCount(); i++) { final Geometry clip = a.getGeometry(i).intersection(mask); geoms.add(clip); } return FunctionsUtil.buildGeometry(geoms, a); } public static Geometry difference(final Geometry a, final Geometry b) { return a.difference(b); } public static Geometry differenceBA(final Geometry a, final Geometry b) { return b.difference(a); } public static Geometry intersection(final Geometry a, final Geometry b) { return a.intersection(b); } public static Geometry symDifference(final Geometry a, final Geometry b) { return a.symDifference(b); } public static Geometry unaryUnion(final Geometry a) { return a.union(); } public static Geometry union(final Geometry a, final Geometry b) { return a.union(b); } public static Geometry unionUsingGeometryCollection(final Geometry a, final Geometry b) { final Geometry gc = a.getGeometryFactory().geometry(a, b); return gc.union(); } }