/* * 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.simplify; import java.util.*; import com.vividsolutions.jts.geom.*; /** * Represents a {@link LineString} which can be modified to a simplified shape. * This class provides an attribute which specifies the minimum allowable length * for the modified result. * * @version 1.7 */ class TaggedLineString { private LineString parentLine; private TaggedLineSegment[] segs; private List resultSegs = new ArrayList(); private int minimumSize; public TaggedLineString(LineString parentLine) { this(parentLine, 2); } public TaggedLineString(LineString parentLine, int minimumSize) { this.parentLine = parentLine; this.minimumSize = minimumSize; init(); } public int getMinimumSize() { return minimumSize; } public LineString getParent() { return parentLine; } public Coordinate[] getParentCoordinates() { return parentLine.getCoordinates(); } public Coordinate[] getResultCoordinates() { return extractCoordinates(resultSegs); } public int getResultSize() { int resultSegsSize = resultSegs.size(); return resultSegsSize == 0 ? 0 : resultSegsSize + 1; } public TaggedLineSegment getSegment(int i) { return segs[i]; } private void init() { Coordinate[] pts = parentLine.getCoordinates(); segs = new TaggedLineSegment[pts.length - 1]; for (int i = 0; i < pts.length - 1; i++) { TaggedLineSegment seg = new TaggedLineSegment(pts[i], pts[i + 1], parentLine, i); segs[i] = seg; } } public TaggedLineSegment[] getSegments() { return segs; } public void addToResult(LineSegment seg) { resultSegs.add(seg); } public LineString asLineString() { return parentLine.getFactory().createLineString(extractCoordinates(resultSegs)); } public LinearRing asLinearRing() { return parentLine.getFactory().createLinearRing(extractCoordinates(resultSegs)); } private static Coordinate[] extractCoordinates(List segs) { Coordinate[] pts = new Coordinate[segs.size() + 1]; LineSegment seg = null; for (int i = 0; i < segs.size(); i++) { seg = (LineSegment) segs.get(i); pts[i] = seg.p0; } // add last point pts[pts.length - 1] = seg.p1; return pts; } }