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1
11 package org.eclipse.jdt.internal.ui.packageview;
12
13 import java.util.ArrayList  ;
14 import java.util.List ;
15
16 import org.eclipse.jface.util.Assert;
17 import org.eclipse.jface.viewers.IElementComparer;
18 import org.eclipse.jface.viewers.StructuredSelection;
19 import org.eclipse.jface.viewers.StructuredViewer;
20
21
26 public class MultiElementSelection extends StructuredSelection {
27
28 private static final TreePath[] EMPTY_TREE_PATHS= new TreePath[0];
29
30 private TreePath[] fAllTreePaths;
31 private CustomHashtable fElement2TreePaths;
32
33 public MultiElementSelection(StructuredViewer viewer, List elements, TreePath[] treePaths) {
34 super(elements);
35 fAllTreePaths= treePaths;
36 fElement2TreePaths= createTreePathMap(viewer.getComparer());
37 }
38
39 public TreePath[] getAllTreePaths() {
40 return fAllTreePaths;
41 }
42
43 public TreePath[] getTreePaths(Object element) {
44 Object value= fElement2TreePaths.get(element);
45 if (value == null) {
46 return EMPTY_TREE_PATHS;
47 } else if (value instanceof TreePath) {
48 return new TreePath[] { (TreePath)value };
49 } else if (value instanceof List ) {
50 List l= (List )value;
51 return (TreePath[])l.toArray(new TreePath[l.size()]);
52 } else {
53 Assert.isTrue(false, "Should not happen"); return null;
55 }
56 }
57
58 public boolean equals(Object o) {
59 if (!super.equals(o))
60 return false;
61 if (!getClass().getName().equals(o.getClass().getName()))
62 return false;
63 MultiElementSelection otherSelection= (MultiElementSelection)o;
64 if (fAllTreePaths.length != otherSelection.fAllTreePaths.length)
65 return false;
66 for (int i= 0; i < fAllTreePaths.length; i++) {
67 if (!fAllTreePaths[i].equals(otherSelection.fAllTreePaths[i]))
68 return false;
69 }
70 return true;
71 }
72
73 private CustomHashtable createTreePathMap(IElementComparer comparer) {
74 CustomHashtable result= new CustomHashtable(comparer);
75 for (int i= 0; i < fAllTreePaths.length; i++) {
76 TreePath path= fAllTreePaths[i];
77 Object key= path.getLastSegment();
78 if (key != null) {
79 Object value= result.get(key);
80 if (value == null) {
81 result.put(key, path);
82 } else if (value instanceof TreePath) {
83 List l= new ArrayList ();
84 l.add(value);
85 l.add(path);
86 result.put(key, l);
87 } else if (value instanceof List ) {
88 ((List )value).add(path);
89 } else {
90 Assert.isTrue(false, "Should not happen"); }
92 }
93 }
94 return result;
95 }
96 }
97 |
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