/* * 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.geom.prep; import com.vividsolutions.jts.geom.Coordinate; import com.vividsolutions.jts.geom.Envelope; import com.vividsolutions.jts.geom.Geometry; import com.vividsolutions.jts.geom.GeometryFactory; import com.vividsolutions.jts.geom.Polygon; import com.vividsolutions.jts.geom.PrecisionModel; import com.vividsolutions.jts.geom.util.SineStarFactory; import com.vividsolutions.jts.io.WKTReader; import com.vividsolutions.jts.io.WKTWriter; import com.vividsolutions.jts.util.GeometricShapeFactory; public abstract class StressTestHarness { static final int MAX_ITER = 10000; static PrecisionModel pm = new PrecisionModel(); static GeometryFactory fact = new GeometryFactory(pm, 0); static WKTReader wktRdr = new WKTReader(fact); static WKTWriter wktWriter = new WKTWriter(); private int numTargetPts = 1000; public StressTestHarness() { } public void setTargetSize(int nPts) { numTargetPts =nPts; } public void run(int nIter) { System.out.println("Running " + nIter + " tests"); // Geometry poly = createCircle(new Coordinate(0, 0), 100, nPts); Geometry poly = createSineStar(new Coordinate(0, 0), 100, numTargetPts); System.out.println(poly); System.out.println(); //System.out.println("Running with " + nPts + " points"); run(nIter, poly); } Geometry createCircle(Coordinate origin, double size, int nPts) { GeometricShapeFactory gsf = new GeometricShapeFactory(); gsf.setCentre(origin); gsf.setSize(size); gsf.setNumPoints(nPts); Geometry circle = gsf.createCircle(); // Polygon gRect = gsf.createRectangle(); // Geometry g = gRect.getExteriorRing(); return circle; } Geometry createSineStar(Coordinate origin, double size, int nPts) { SineStarFactory gsf = new SineStarFactory(); gsf.setCentre(origin); gsf.setSize(size); gsf.setNumPoints(nPts); gsf.setArmLengthRatio(0.1); gsf.setNumArms(20); Geometry poly = gsf.createSineStar(); return poly; } Geometry createRandomTestGeometry(Envelope env, double size, int nPts) { double width = env.getWidth(); double xOffset = width * Math.random(); double yOffset = env.getHeight() * Math.random(); Coordinate basePt = new Coordinate( env.getMinX() + xOffset, env.getMinY() + yOffset); Geometry test = createTestCircle(basePt, size, nPts); if (test instanceof Polygon && Math.random() > 0.5) { test = test.getBoundary(); } return test; } Geometry createTestCircle(Coordinate base, double size, int nPts) { GeometricShapeFactory gsf = new GeometricShapeFactory(); gsf.setCentre(base); gsf.setSize(size); gsf.setNumPoints(nPts); Geometry circle = gsf.createCircle(); // System.out.println(circle); return circle; } public void run(int nIter, Geometry target) { int count = 0; while (count < nIter) { count++; Geometry test = createRandomTestGeometry(target.getEnvelopeInternal(), 10, 20); // System.out.println("Test # " + count); // System.out.println(line); // System.out.println("Test[" + count + "] " + target.getClass() + "/" + test.getClass()); boolean isResultCorrect = checkResult(target, test); if (! isResultCorrect) { throw new RuntimeException("Invalid result found"); } } } public abstract boolean checkResult(Geometry target, Geometry test); }