PolygonizeDirectedEdge.java
/*
* 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 2.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v20.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jts.operation.polygonize;
import org.locationtech.jts.geom.Coordinate;
import org.locationtech.jts.planargraph.DirectedEdge;
import org.locationtech.jts.planargraph.Node;
/**
* A {@link DirectedEdge} of a {@link PolygonizeGraph}, which represents
* an edge of a polygon formed by the graph.
* May be logically deleted from the graph by setting the <code>marked</code> flag.
*
* @version 1.7
*/
class PolygonizeDirectedEdge
extends DirectedEdge
{
private EdgeRing edgeRing = null;
private PolygonizeDirectedEdge next = null;
private long label = -1;
/**
* Constructs a directed edge connecting the <code>from</code> node to the
* <code>to</code> node.
*
* @param directionPt
* specifies this DirectedEdge's direction (given by an imaginary
* line from the <code>from</code> node to <code>directionPt</code>)
* @param edgeDirection
* whether this DirectedEdge's direction is the same as or
* opposite to that of the parent Edge (if any)
*/
public PolygonizeDirectedEdge(Node from, Node to, Coordinate directionPt,
boolean edgeDirection)
{
super(from, to, directionPt, edgeDirection);
}
/**
* Returns the identifier attached to this directed edge.
*/
public long getLabel() { return label; }
/**
* Attaches an identifier to this directed edge.
*/
public void setLabel(long label) { this.label = label; }
/**
* Returns the next directed edge in the EdgeRing that this directed edge is a member
* of.
*/
public PolygonizeDirectedEdge getNext() { return next; }
/**
* Sets the next directed edge in the EdgeRing that this directed edge is a member
* of.
*/
public void setNext(PolygonizeDirectedEdge next) { this.next = next; }
/**
* Returns the ring of directed edges that this directed edge is
* a member of, or null if the ring has not been set.
* @see #setRing(EdgeRing)
*/
public boolean isInRing() { return edgeRing != null; }
/**
* Sets the ring of directed edges that this directed edge is
* a member of.
*/
public void setRing(EdgeRing edgeRing)
{
this.edgeRing = edgeRing;
}
/**
* Gets the {@link EdgeRing} this edge is a member of.
*
* @return an edge ring
*/
public EdgeRing getRing()
{
return this.edgeRing;
}
}