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Java > Open Source Codes > org > quilt > graph > UnaryConnector


1 /* UnaryConnector.java */
2
3 package org.quilt.graph;
4
5 /**
6  * A Connector holding a single edge.
7  *
8  * @author <a HREF="jddixon@users.sourceforge.net">Jim Dixon</a>
9  */
10 public class UnaryConnector extends Connector {
11     private Edge edge;
12
13     public UnaryConnector (Edge e) {
14         if (e == null) {
15             throw new IllegalArgumentException JavaDoc("null edge");
16         }
17         edge = e;
18     }
19     /** Get the edge. */
20     public Edge getEdge() {
21         return edge;
22     }
23     // XXX Although the next two methods are labeled 'convenience
24 // method', it might be better to be less flexible. It
25 // never makes sense to have the source of an edge be anything
26 // other than the vertex it is attached to.
27
28     /** Get the target of the connection. Convenience method. */
29     public Vertex getTarget () {
30         return edge.getTarget();
31     }
32     /** Set the target of the connection. Convenience method. */
33     public void setTarget (Vertex v) {
34         edge.setTarget(v);
35     }
36     public int size () {
37         return 1;
38     }
39 }
40
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