public Object execute()

in org.eclipse.mylyn.github.ui/src/org/eclipse/mylyn/internal/github/ui/gist/CreateGistHandler.java [102:164]
59 lines of code
26 McCabe index (conditional complexity)

	public Object execute(ExecutionEvent event) throws ExecutionException {
		// TODO replace this with
		// HandlerUtil.getActiveEditorInput(ExecutionEvent) as soon
		// as we don't support Eclipse 3.6 anymore
		IEditorInput input = getActiveEditorInput(event);
		IWorkbenchPart part = getActivePart(event);
		ISelection selection = HandlerUtil.getCurrentSelection(event);
		if (selection == null || selection.isEmpty())
			selection = HandlerUtil.getActiveMenuSelection(event);
		if (selection == null || selection.isEmpty())
			return null;

		boolean isPublic = Boolean
				.parseBoolean(event.getParameter(PUBLIC_GIST));
		if (selection instanceof ITextSelection) {
			ITextSelection text = (ITextSelection) selection;
			String name = null;
			if (part == null || part instanceof IEditorPart) {
				if (input instanceof IFileEditorInput) {
					IFile file = ((IFileEditorInput) input).getFile();
					if (file != null)
						name = file.getName();
				}
				if (name == null && input instanceof IPathEditorInput) {
					IPath path = ((IPathEditorInput) input).getPath();
					if (path != null)
						name = path.lastSegment();
				}
				if (name == null && input instanceof IURIEditorInput) {
					URI uri = ((IURIEditorInput) input).getURI();
					if (uri != null) {
						String rawPath = uri.getRawPath();
						if (rawPath != null) {
							int lastSlash = rawPath.lastIndexOf('/') + 1;
							if (lastSlash > 0 && lastSlash < rawPath.length())
								name = rawPath.substring(lastSlash);
						}
					}
				}
			} else if (part instanceof IWorkbenchPart2)
				name = ((IWorkbenchPart2) part).getPartName().replace(" ", "") //$NON-NLS-1$ //$NON-NLS-2$
						.toLowerCase(Locale.US)
						+ ".txt"; //$NON-NLS-1$
			if (name == null)
				name = DEFAULT_FILENAME;
			createGistJob(event, name, text.getText(), isPublic);
		} else if (selection instanceof IStructuredSelection) {
			IStructuredSelection structuredSelection = (IStructuredSelection) selection;
			Object obj = structuredSelection.getFirstElement();
			IResource file = null;
			if (obj instanceof IResource)
				file = (IResource) obj;
			else if (obj instanceof IAdaptable) {
				file = ((IAdaptable) obj)
						.getAdapter(IResource.class);
				if (file == null)
					file = ((IAdaptable) obj).getAdapter(IFile.class);
			}
			if (file instanceof IFile)
				createGistJob(event, (IFile) file, isPublic);
		}
		return null;
	}