/* * 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.vividsolutions.jts.operation; import com.vividsolutions.jts.algorithm.*; import com.vividsolutions.jts.geom.*; import com.vividsolutions.jts.geomgraph.GeometryGraph; /** * The base class for operations that require {@link GeometryGraph}s. * * @version 1.7 */ public class GeometryGraphOperation { protected final LineIntersector li = new RobustLineIntersector(); protected PrecisionModel resultPrecisionModel; /** * The operation args into an array so they can be accessed by index */ protected GeometryGraph[] arg; // the arg(s) of the operation public GeometryGraphOperation(Geometry g0, Geometry g1) { this(g0, g1, BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE // BoundaryNodeRule.ENDPOINT_BOUNDARY_RULE ); } public GeometryGraphOperation(Geometry g0, Geometry g1, BoundaryNodeRule boundaryNodeRule) { // use the most precise model for the result if (g0.getPrecisionModel().compareTo(g1.getPrecisionModel()) >= 0) setComputationPrecision(g0.getPrecisionModel()); else setComputationPrecision(g1.getPrecisionModel()); arg = new GeometryGraph[2]; arg[0] = new GeometryGraph(0, g0, boundaryNodeRule); arg[1] = new GeometryGraph(1, g1, boundaryNodeRule); } public GeometryGraphOperation(Geometry g0) { setComputationPrecision(g0.getPrecisionModel()); arg = new GeometryGraph[1]; arg[0] = new GeometryGraph(0, g0);; } public Geometry getArgGeometry(int i) { return arg[i].getGeometry(); } protected void setComputationPrecision(PrecisionModel pm) { resultPrecisionModel = pm; li.setPrecisionModel(resultPrecisionModel); } }