1    package graphics.graph; 
2     
3    import java.util.Vector; 
4     
5    public class EdgesBean { 
6        private static EdgesBean eb = new EdgesBean(); 
7        private Nodes nodes = GraphFactory.getNodes(); 
8     
9        private EdgesBean() { 
10       } 
11    
12       public static EdgesBean getEdgesBean() { 
13           return eb; 
14       } 
15    
16       private Vector edgeVector = new Vector(); 
17    
18       public void addEdge(Edge e) { 
19    
20           if (containsEdge(e)) 
21               return; 
22           System.out.println("adding edge:" + e); 
23           edgeVector.addElement(e); 
24       } 
25    
26       public boolean containsEdge(Edge e) { 
27           if (e == null) return true; 
28           for (int i = 0; i < edgeVector.size(); i++) { 
29               Edge e1 = (Edge) edgeVector.elementAt(i); 
30               if (e1.equals(e)) return true; 
31           } 
32           return false; 
33       } 
34    
35       public int getNumberOfEdges() { 
36           return edgeVector.size(); 
37       } 
38    
39       public void addEdge(String nodeName1, String nodeName2) { 
40           addEdge(nodeName1, nodeName2, 40); 
41       } 
42    
43       void addEdge(String from, String to, int len) { 
44           Edge e = new Edge(); 
45           e.setFrom(nodes.findNode(from)); 
46           e.setTo(nodes.findNode(to)); 
47           e.setLen(len); 
48           addEdge(e); 
49       } 
50    
51       public Edge getEdge(int i) { 
52           return (Edge) edgeVector.elementAt(i); 
53       } 
54   }