org.locationtech.jts.geom.prep.PreparedLineString Maven / Gradle / Ivy
/*
* 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.geom.prep;
import org.locationtech.jts.geom.Geometry;
import org.locationtech.jts.geom.Lineal;
import org.locationtech.jts.noding.FastSegmentSetIntersectionFinder;
import org.locationtech.jts.noding.SegmentStringUtil;
/**
* A prepared version for {@link Lineal} geometries.
*
* Instances of this class are thread-safe.
*
* @author mbdavis
*
*/
public class PreparedLineString
extends BasicPreparedGeometry
{
private FastSegmentSetIntersectionFinder segIntFinder = null;
public PreparedLineString(Lineal line) {
super((Geometry) line);
}
public synchronized FastSegmentSetIntersectionFinder getIntersectionFinder()
{
/**
* MD - Another option would be to use a simple scan for
* segment testing for small geometries.
* However, testing indicates that there is no particular advantage
* to this approach.
*/
if (segIntFinder == null)
segIntFinder = new FastSegmentSetIntersectionFinder(SegmentStringUtil.extractSegmentStrings(getGeometry()));
return segIntFinder;
}
public boolean intersects(Geometry g)
{
if (! envelopesIntersect(g)) return false;
return PreparedLineStringIntersects.intersects(this, g);
}
/**
* There's not much point in trying to optimize contains, since
* contains for linear targets requires the entire test geometry
* to exactly match the target linework.
*/
}