Alex Rivera | Logout

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

Asked 2011-07-31T21:03:46.213
13

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?

java eclipse eclipse-plugin eclipse-pde
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1 Answer

7

Had a very long day working my way through the answers here and a whole lot of other answers and found the bit that finally got me there was to do a Java Reflection loop to study the Class and Interface structure of the selection from the Tree in the navigator. The Class introspection loop is in its final resting place but was originally much closer to the top of the execute method.

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeSelection;
import org.eclipse.jface.viewers.TreePath;
import org.eclipse.jface.viewers.TreeSelection;

public class MyHandler extends AbstractHandler {
/**
 * The constructor.
 */
public MyHandler() {
}

public Object execute(ExecutionEvent event) throws ExecutionException {
    IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindow(event);
    IWorkbenchPage activePage = window.getActivePage();
    ISelection selection = activePage.getSelection();
    if (selection != null) {
        System.out.println("Got selection");
        if (selection instanceof IStructuredSelection) {
            System.out.println("Got a structured selection");
            if (selection instanceof ITreeSelection) {
                TreeSelection treeSelection = (TreeSelection) selection;
                TreePath[] treePaths = treeSelection.getPaths();
                TreePath treePath = treePaths[0];

                System.out.println("Last");
                Object lastSegmentObj = treePath.getLastSegment();
                Class currClass = lastSegmentObj.getClass();
                while(currCl
answered 2012-07-20T13:49:38.130

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