Eclipse Plugin: how to get the path to the currently selected project

Question

I am writing an Eclipse plugin that will display a menu item in the context menu for a Java Project. I have written the plugin.xml as follows:

<plugin>
   <extension
         point="org.eclipse.ui.menus">
      <menuContribution
            locationURI="popup:org.eclipse.jdt.ui.PackageExplorer">
         <dynamic
               class="uk.co.dajohnston.plugin.classpathswitcher.menu.MenuContribution"
               id="uk.co.dajohnston.plugin.classpathSwitcher.switchMenuContribution">
            <visibleWhen>
               <with
                     variable="activeMenuSelection">
                  <iterate>
                     <adapt
                           type="org.eclipse.jdt.core.IJavaProject">
                     </adapt>
                  </iterate>
                  <count
                        value="1">
                  </count>
               </with>
            </visibleWhen>
         </dynamic>
      </menuContribution>
   </extension>

</plugin>

So I am now trying to write the MenuContribution class which extends CompoundContributionItem so that I can create a dynamic menu and the contents of this menu are going to be based on a set of files that exist in the Java Project's root directory. But I am stuck trying to get the path to the root directory from within the getContributionItems method.

Based on the plugin.xml file I can be guarenteed that the method will only be called if a single Java Project is selected, so all I need to do is get the current selection and then get its absolute path. Any ideas? Or is there a better way to do this?

Answer 1

This should get you closer (if not solve it completely for you ;))

    IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
    if (window != null)
    {
        IStructuredSelection selection = (IStructuredSelection) window.getSelectionService().getSelection();
        Object firstElement = selection.getFirstElement();
        if (firstElement instanceof IAdaptable)
        {
            IProject project = (IProject)((IAdaptable)firstElement).getAdapter(IProject.class);
            IPath path = project.getFullPath();
            System.out.println(path);
        }
    }