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Go to your plugin to add a menu contribution. Open plugin.xml → Dependencies and add org.eclipse.ui if not on the list yet. Go to Extensions and add org.eclipse.ui.menus.
1. Add a menuContribution element to the new extension and set "popup:org.eclipse.ui.popup.any?after=additions" as as locationURI (without quotation marks).
2. Add a command element to the menuContribution with the following attributes:
  - commandId: de.cau.cs.rtprak.login.setSimFile
  - label: Set Simulation File
3. Add a visibleWhen element to the command, and add an iterate element to the visibleWhen with the following attributes:
  - operator: and
  - ifEmpty: false
4. Add an adapt element to the iterate with the following attribute:
  - type: org.eclipse.core.resources.IResource
5. Add a test element to the adapt with the following attributes:
  - property: org.eclipse.core.resources.extension
  - value: brainfuck (or your file extension if you have chosen another one)
6. Add a new extension org.eclipse.ui.commands and add a command element to it with the following attributes:
  - id: de.cau.cs.rtprak.login.setSimFile
  - name: Set Simulation File
  - Click on defaultHandler to open a dialog for creation of a new handler class. Name the new class SetFileHandler and put it into some package of that plugin. Remove the suggested interface and set org.eclipse.core.commands.AbstractHandler as superclass instead.

Create a command handler that loads the BF model from the selected file, calls the transformation on the model, and saves the newly generated BF program to a file with a different name (but same extension). You can use the following code as a template: (The code requires a dependency to com.google.inject to work.)

Code Block

language	java

@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
    ISelection selection = HandlerUtil.getCurrentSelection(event);
    if (selection instanceof IStructuredSelection) {
        Object element = ((IStructuredSelection) selection).getFirstElement();
        if (element instanceof IFile) {
            IFile bfFile = (IFile) element;
              
            // Load Turing Machine
            Brainfuck bfProgram = loadBrainfuckProgram(bfFile);
              
            // Call the transformation
            Injector injector = Guice.createInjector();
            ExtendedBrainfuckTransformation transformation =
                    injector.getInstance(ExtendedBrainfuckTransformation.class);
            Program newBFProgram = transformation.transformExtendedBrainfuck(bfPRogram);
              
            // Save brainfuck program
            IFile newBFFile = bfFile.getParent().getFile(
                    new Path(bfFile.getName() + "2" + ".brainfuck"));
            saveBrainfuckProgram(newBFFile, newBFProgram);
              
            // Refresh the parent folder to have the new file show up in the UI
            try {
                bfFile.getParent().refreshLocal(IResource.DEPTH_ONE, null);
            } catch (CoreException e) {
                // Ignore
            }
        }
    }
    return null;
}
  
/**
 * Load the Brainfuck program model from the given file.
 *
 * @param bfFile the file to load the Brainfuck program model.
 * @return the Brainfuck model.
 * @throws ExecutionException if the file couldn't be opened.
 */
private brainfuck loadBrainfuckProgram(IFile bfFile) throws ExecutionException {
    // TODO Implement.
}
  
/**
 * Saves the given Brainfuck program.
 *
 * @param bfFile the Brainfuck file to save the program to.
 * @param bfProgram the program to save.
 * @throws ExecutionException if there was an error saving the file.
 */
private void saveBrainfuckProgram(IFile bfFile, Program bfProgram) throws ExecutionException {
    // TODO Implement
}

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