/*
* Copyright (c) 2016 Vivid Solutions.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jts.operation.valid;
import org.locationtech.jts.geom.Coordinate;
import org.locationtech.jts.geom.Geometry;
import org.locationtech.jts.geom.GeometryCollection;
import org.locationtech.jts.geom.LineString;
import org.locationtech.jts.geom.MultiPoint;
import org.locationtech.jts.geom.Point;
import org.locationtech.jts.geom.Polygon;
/**
* Implements the appropriate checks for repeated points
* (consecutive identical coordinates) as defined in the
* JTS spec.
*
* @version 1.7
*/
public class RepeatedPointTester {
// save the repeated coord found (if any)
private Coordinate repeatedCoord;
public RepeatedPointTester() {
}
public Coordinate getCoordinate() { return repeatedCoord; }
public boolean hasRepeatedPoint(Geometry g)
{
if (g.isEmpty()) return false;
if (g instanceof Point) return false;
else if (g instanceof MultiPoint) return false;
// LineString also handles LinearRings
else if (g instanceof LineString) return hasRepeatedPoint(((LineString) g).getCoordinates());
else if (g instanceof Polygon) return hasRepeatedPoint((Polygon) g);
else if (g instanceof GeometryCollection) return hasRepeatedPoint((GeometryCollection) g);
else throw new UnsupportedOperationException(g.getClass().getName());
}
public boolean hasRepeatedPoint(Coordinate[] coord)
{
for (int i = 1; i < coord.length; i++) {
if (coord[i - 1].equals(coord[i]) ) {
repeatedCoord = coord[i];
return true;
}
}
return false;
}
private boolean hasRepeatedPoint(Polygon p)
{
if (hasRepeatedPoint(p.getExteriorRing().getCoordinates())) return true;
for (int i = 0; i < p.getNumInteriorRing(); i++) {
if (hasRepeatedPoint(p.getInteriorRingN(i).getCoordinates())) return true;
}
return false;
}
private boolean hasRepeatedPoint(GeometryCollection gc)
{
for (int i = 0; i < gc.getNumGeometries(); i++) {
Geometry g = gc.getGeometryN(i);
if (hasRepeatedPoint(g)) return true;
}
return false;
}
}