Class PolygonizeDirectedEdge

1
2	/*
3	* Copyright (c) 2016 Vivid Solutions.
4	*
5	* All rights reserved. This program and the accompanying materials
6	* are made available under the terms of the Eclipse Public License 2.0
7	* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
8	* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v20.html
9	* and the Eclipse Distribution License is available at
10	*
11	* http://www.eclipse.org/org/documents/edl-v10.php.
12	*/
13	package org.locationtech.jts.operation.polygonize;
14
15	import org.locationtech.jts.geom.Coordinate;
16	import org.locationtech.jts.planargraph.DirectedEdge;
17	import org.locationtech.jts.planargraph.Node;
18
19	/**
20	* A {@link DirectedEdge} of a {@link PolygonizeGraph}, which represents
21	* an edge of a polygon formed by the graph.
22	* May be logically deleted from the graph by setting the <code>marked</code> flag.
23	*
24	* @version 1.7
25	*/
26	class PolygonizeDirectedEdge
27	extends DirectedEdge
28	{
29
30	private EdgeRing edgeRing = null;
31	private PolygonizeDirectedEdge next = null;
32	private long label = -1;
33
34	/**
35	* Constructs a directed edge connecting the <code>from</code> node to the
36	* <code>to</code> node.
37	*
38	* @param directionPt
39	* specifies this DirectedEdge's direction (given by an imaginary
40	* line from the <code>from</code> node to <code>directionPt</code>)
41	* @param edgeDirection
42	* whether this DirectedEdge's direction is the same as or
43	* opposite to that of the parent Edge (if any)
44	*/
45	public PolygonizeDirectedEdge(Node from, Node to, Coordinate directionPt,
46	boolean edgeDirection)
47	{
48	super(from, to, directionPt, edgeDirection);
49	}
50
51	/**
52	* Returns the identifier attached to this directed edge.
53	*/
54	public long getLabel() { return label; }
55	/**
56	* Attaches an identifier to this directed edge.
57	*/
58	public void setLabel(long label) { this.label = label; }
59	/**
60	* Returns the next directed edge in the EdgeRing that this directed edge is a member
61	* of.
62	*/
63	public PolygonizeDirectedEdge getNext() { return next; }
64	/**
65	* Sets the next directed edge in the EdgeRing that this directed edge is a member
66	* of.
67	*/
68	public void setNext(PolygonizeDirectedEdge next) { this.next = next; }
69	/**
70	* Returns the ring of directed edges that this directed edge is
71	* a member of, or null if the ring has not been set.
72	* @see #setRing(EdgeRing)
73	*/
74	public boolean isInRing() { return edgeRing != null; }
75	/**
76	* Sets the ring of directed edges that this directed edge is
77	* a member of.
78	*/
79	public void setRing(EdgeRing edgeRing)
80	{
81	this.edgeRing = edgeRing;
82	}
83	/**
84	* Gets the {@link EdgeRing} this edge is a member of.
85	*
86	* @return an edge ring
87	*/
88	public EdgeRing getRing()
89	{
90	return this.edgeRing;
91	}
92
93	}
94