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1
19
20 package swingwtx.swing.tree;
21
22
23 public class TreePath {
24
25 private TreePath parentPath;
26 private Object  lastPathComponent;
27
28 protected TreePath() {
29 }
30
31 public TreePath(Object singlePath) {
32 lastPathComponent = singlePath;
33 parentPath = null;
34 }
35
36 protected TreePath(TreePath parent, Object lastElement) {
37 parentPath = parent;
38 lastPathComponent = lastElement;
39 }
40
41 protected TreePath(Object [] path, int length) {
42 lastPathComponent = path[path.length - length];
43 if(length > 1)
44 parentPath = new TreePath(path, length - 1);
45 }
46
47 public TreePath(Object [] path) {
48 lastPathComponent = path[0];
49 if (path.length > 1) {
50 parentPath = new TreePath(path, path.length - 1);
51 }
52 }
53
54 public Object [] getPath() {
55 int i = getPathCount();
56 Object [] result = new Object [i--];
57 for(TreePath path = this; path != null; path = path.parentPath) {
58 result[i--] = path.lastPathComponent;
59 }
60 return result;
61 }
62
63 public Object getLastPathComponent() {
64 return lastPathComponent;
65 }
66
67 public int getPathCount() {
68 int result = 0;
69 for (TreePath path = this; path != null; path = path.parentPath) {
70 result++;
71 }
72 return result;
73 }
74
75 public Object getPathComponent(int element) {
76 TreePath path = this;
77 int pathLength = getPathCount();
78 for(int i = pathLength-1; i != element; i--) {
79 path = path.parentPath;
80 }
81 return path.lastPathComponent;
82 }
83
84 public TreePath pathByAddingChild(Object child) {
85 return new TreePath(this, child);
86 }
87
88 public TreePath getParentPath() {
89 return parentPath;
90 }
91
92 public String toString() {
93 StringBuffer s = new StringBuffer ("[");
94 for(int c = 0, m = getPathCount(); c<m;
95 c++) {
96 if(c> 0)
97 s.append(", ");
98 s.append(getPathComponent(c));
99 }
100 s.append("]");
101 return s.toString();
102 }
103
104 }
105 |
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