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Java > Open Source Codes > prefuse > data > tuple > TableEdge


1 package prefuse.data.tuple;
2
3 import prefuse.data.Edge;
4 import prefuse.data.Graph;
5 import prefuse.data.Node;
6 import prefuse.data.Table;
7
8 /**
9  * Edge implementation that reads Edge data from a backing edge table.
10  *
11  * @author <a HREF="http://jheer.org">jeffrey heer</a>
12  */
13 public class TableEdge extends TableTuple implements Edge {
14
15     /**
16      * The backing graph.
17      */
18     protected Graph m_graph;
19     
20     /**
21      * Initialize a new Edge backed by an edge table. This method is used by
22      * the appropriate TupleManager instance, and should not be called
23      * directly by client code, unless by a client-supplied custom
24      * TupleManager.
25      * @param table the edge Table
26      * @param graph the backing Graph
27      * @param row the row in the edge table to which this Node instance
28      * corresponds.
29      */
30     protected void init(Table table, Graph graph, int row) {
31         m_table = table;
32         m_graph = graph;
33         m_row = m_table.isValidRow(row) ? row : -1;
34     }
35     
36     /**
37      * @see prefuse.data.Edge#getGraph()
38      */
39     public Graph getGraph() {
40         return m_graph;
41     }
42     
43     /**
44      * @see prefuse.data.Edge#isDirected()
45      */
46     public boolean isDirected() {
47         return m_graph.isDirected();
48     }
49     
50     /**
51      * @see prefuse.data.Edge#getSourceNode()
52      */
53     public Node getSourceNode() {
54         return m_graph.getSourceNode(this);
55     }
56
57     /**
58      * @see prefuse.data.Edge#getTargetNode()
59      */
60     public Node getTargetNode() {
61         return m_graph.getTargetNode(this);
62     }
63
64     /**
65      * @see prefuse.data.Edge#getAdjacentNode(prefuse.data.Node)
66      */
67     public Node getAdjacentNode(Node n) {
68         return m_graph.getAdjacentNode(this, n);
69     }
70
71 } // end of class TableEdge
72
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