/*
* 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.relate;
import java.util.Iterator;
import org.locationtech.jts.geom.IntersectionMatrix;
import org.locationtech.jts.geomgraph.EdgeEnd;
import org.locationtech.jts.geomgraph.EdgeEndStar;
/**
* An ordered list of {@link EdgeEndBundle}s around a {@link RelateNode}.
* They are maintained in CCW order (starting with the positive x-axis) around the node
* for efficient lookup and topology building.
*
* @version 1.7
*/
public class EdgeEndBundleStar
extends EdgeEndStar
{
/**
* Creates a new empty EdgeEndBundleStar
*/
public EdgeEndBundleStar() {
}
/**
* Insert a EdgeEnd in order in the list.
* If there is an existing EdgeStubBundle which is parallel, the EdgeEnd is
* added to the bundle. Otherwise, a new EdgeEndBundle is created
* to contain the EdgeEnd.
* <br>
*/
public void insert(EdgeEnd e)
{
EdgeEndBundle eb = (EdgeEndBundle) edgeMap.get(e);
if (eb == null) {
eb = new EdgeEndBundle(e);
insertEdgeEnd(e, eb);
}
else {
eb.insert(e);
}
}
/**
* Update the IM with the contribution for the EdgeStubs around the node.
*/
void updateIM(IntersectionMatrix im)
{
for (Iterator it = iterator(); it.hasNext(); ) {
EdgeEndBundle esb = (EdgeEndBundle) it.next();
esb.updateIM(im);
}
}
}