ReviewWizardHandler.java

package net.certware.argument.sfp.review.wizard;
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.jface.text.TextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.handlers.HandlerUtil;

/**
 * Handles the command to launch the review wizard.
 * @author mrb
 * @since 1.0.3
 */
public class ReviewWizardHandler extends AbstractHandler {

	/* (non-Javadoc)
	 * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
	 */
	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {

		ISelection selection = HandlerUtil.getCurrentSelectionChecked(event);

		// launched from the editor context menu
		if ( selection instanceof TextSelection ) {
			IEditorInput input = HandlerUtil.getActiveEditor(event).getEditorInput();
			IFile f = (IFile) input.getAdapter(IFile.class); // wizard catches null and reports
			ReviewWizard wizard = new ReviewWizard();
			wizard.init(HandlerUtil.getActiveWorkbenchWindowChecked(event).getWorkbench(), f);
			WizardDialog dialog = new WizardDialog(HandlerUtil.getActiveShellChecked(event), wizard);
			dialog.create();
			dialog.open();
		}

		// launched from the explorer
		if ( selection instanceof IStructuredSelection ) {
			IStructuredSelection iss = (IStructuredSelection)selection;
			Object first = iss.getFirstElement();
			if ( first instanceof IFile ) {
				IFile f = (IFile)first;
				ReviewWizard wizard = new ReviewWizard();
				wizard.init(HandlerUtil.getActiveWorkbenchWindowChecked(event).getWorkbench(), f);
				WizardDialog dialog = new WizardDialog(HandlerUtil.getActiveShellChecked(event), wizard);
				dialog.create();
				dialog.open();
			} 
		}

		return null;
	}
}