public Object execute()

in eclipse/eclipse-ui/src/org/apache/sling/ide/eclipse/ui/wizards/ConvertToBundleProjectHandler.java [48:124]
67 lines of code
16 McCabe index (conditional complexity)

    public Object execute(ExecutionEvent event) throws ExecutionException {
        
        ISelection selection = HandlerUtil.getCurrentSelection(event);
        
		if (selection instanceof IStructuredSelection) {
			List<IProject> applicableProjects = new LinkedList<>();
			IProject[] allProjects = ResourcesPlugin.getWorkspace().getRoot().getProjects();
			for (IProject p : allProjects) {
				if (p.isOpen() && ProjectHelper.isPotentialBundleProject(p)) {
					applicableProjects.add(p);
				}
			}
			Object[] elems = ((IStructuredSelection) selection).toArray();
			List<IProject> initialSelection = new ArrayList<>(elems.length);

			for (Object elem : elems) {
				IProject project = null;

				if (elem instanceof IFile) {
					IFile file = (IFile) elem;
					project = file.getProject();
				} else if (elem instanceof IProject) {
					project = (IProject) elem;
				} else if (elem instanceof IJavaProject) {
					project = ((IJavaProject) elem).getProject();
				}
				if (project != null)
					initialSelection.add(project);
			}

			ConvertProjectsWizard wizard = new ConvertProjectsWizard(applicableProjects, initialSelection, 
                    "Convert to Bundle Project(s)", "Select project(s) to convert to Bundle project(s)\n"
                            + "List contains open Java projects that are not yet bundle or content projects.");

			final Display display = getDisplay();
			final WizardDialog dialog = new WizardDialog(display.getActiveShell(), wizard);
			BusyIndicator.showWhile(display, new Runnable() {
				public void run() {
					dialog.open();
				}
			});
			if (dialog.getReturnCode()!=WizardDialog.OK) {
				// user did not click OK
				return null;
			}
			final List<IProject> selectedProjects = wizard.getSelectedProjects();
			if (selectedProjects == null || selectedProjects.size()==0) {
				// no project was selected
			    return null;
			}
			IRunnableWithProgress r = new IRunnableWithProgress() {
				
				@Override
				public void run(IProgressMonitor monitor) throws InvocationTargetException,
						InterruptedException {
					try {
						for (IProject project : selectedProjects) {
						    ConfigurationHelper.convertToBundleProject(project);
						}
					} catch (CoreException e) {
						e.printStackTrace();
						MessageDialog.openError(getDisplay().getActiveShell(), "Could not convert project",
								e.getMessage());
					}
				}
			};
			try {
				PlatformUI.getWorkbench().getProgressService().busyCursorWhile(r);
			} catch (Exception e) {
				e.printStackTrace();
				MessageDialog.openError(getDisplay().getActiveShell(), "Could not convert project",
						e.getMessage());
			}
		}
		
		return null;
	}