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Java > Open Source Codes > $packageName$ > ToggleNatureAction


1 package $packageName$;
2
3 import java.util.Iterator JavaDoc;
4
5 import org.eclipse.core.resources.IProject;
6 import org.eclipse.core.resources.IProjectDescription;
7 import org.eclipse.core.runtime.CoreException;
8 import org.eclipse.core.runtime.IAdaptable;
9 import org.eclipse.jface.action.IAction;
10 import org.eclipse.jface.viewers.ISelection;
11 import org.eclipse.jface.viewers.IStructuredSelection;
12 import org.eclipse.ui.IObjectActionDelegate;
13 import org.eclipse.ui.IWorkbenchPart;
14
15 public class ToggleNatureAction implements IObjectActionDelegate {
16
17     private ISelection selection;
18
19     /*
20      * (non-Javadoc)
21      *
22      * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
23      */
24     public void run(IAction action) {
25         if (selection instanceof IStructuredSelection) {
26             for (Iterator JavaDoc it = ((IStructuredSelection) selection).iterator(); it
27                     .hasNext();) {
28                 Object JavaDoc element = it.next();
29                 IProject project = null;
30                 if (element instanceof IProject) {
31                     project = (IProject) element;
32                 } else if (element instanceof IAdaptable) {
33                     project = (IProject) ((IAdaptable) element)
34                             .getAdapter(IProject.class);
35                 }
36                 if (project != null) {
37                     toggleNature(project);
38                 }
39             }
40         }
41     }
42
43     /*
44      * (non-Javadoc)
45      *
46      * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction,
47      * org.eclipse.jface.viewers.ISelection)
48      */
49     public void selectionChanged(IAction action, ISelection selection) {
50         this.selection = selection;
51     }
52
53     /*
54      * (non-Javadoc)
55      *
56      * @see org.eclipse.ui.IObjectActionDelegate#setActivePart(org.eclipse.jface.action.IAction,
57      * org.eclipse.ui.IWorkbenchPart)
58      */
59     public void setActivePart(IAction action, IWorkbenchPart targetPart) {
60     }
61
62     /**
63      * Toggles sample nature on a project
64      *
65      * @param project
66      * to have sample nature added or removed
67      */
68     private void toggleNature(IProject project) {
69         try {
70             IProjectDescription description = project.getDescription();
71             String JavaDoc[] natures = description.getNatureIds();
72
73             for (int i = 0; i < natures.length; ++i) {
74                 if ($natureClassName$.NATURE_ID.equals(natures[i])) {
75                     // Remove the nature
76 String JavaDoc[] newNatures = new String JavaDoc[natures.length - 1];
77                     System.arraycopy(natures, 0, newNatures, 0, i);
78                     System.arraycopy(natures, i + 1, newNatures, i,
79                             natures.length - i - 1);
80                     description.setNatureIds(newNatures);
81                     project.setDescription(description, null);
82                     return;
83                 }
84             }
85
86             // Add the nature
87 String JavaDoc[] newNatures = new String JavaDoc[natures.length + 1];
88             System.arraycopy(natures, 0, newNatures, 0, natures.length);
89             newNatures[natures.length] = $natureClassName$.NATURE_ID;
90             description.setNatureIds(newNatures);
91             project.setDescription(description, null);
92         } catch (CoreException e) {
93         }
94     }
95
96 }
97
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