import org.eclipse.gef.ui.actions.DeleteAction; //导入依赖的package包/类
/**
 * @see org.eclipse.gef.ui.parts.GraphicalEditor#createActions()
 */
@SuppressWarnings("unchecked")
@Override
protected void createActions() {
    super.createActions();
    ActionRegistry registry = getActionRegistry();

    IAction action = new AddInteractionOperandAction(this);
    registry.registerAction(action);
    getSelectionActions().add(action.getId());
    
     action = new AddCoveredLifelineAction(this);
    registry.registerAction(action);
    getSelectionActions().add(action.getId());
    
     action = new RemoveCoveredLifelineAction(this);
    registry.registerAction(action);
    getSelectionActions().add(action.getId());

    // 기존에 등록된 'Delete(다이어그램에서 삭제)' 액션을 빼고,
    // delete를 키로 DeleteUMLElementAction를 등록한다.
    IAction deleteAction = new DeleteAction((IWorkbenchPart) this);
    registry.removeAction(deleteAction);
    getSelectionActions().remove(deleteAction.getId());

    action = new DeleteSequenceUMLElementAction(this, false);
    registry.removeAction(action);
    getSelectionActions().remove(action.getId());

    action.setId(deleteAction.getId());
    registry.registerAction(action);
    getSelectionActions().add(deleteAction.getId());
    
}
 

import org.eclipse.gef.ui.actions.DeleteAction; //导入依赖的package包/类
private void registerStaticActions() {
	final ProductSystemGraphEditor editor = model.editor;
	actionRegistry.registerAction(ActionFactory.buildSupplyChainMenu(editor));
	actionRegistry.registerAction(ActionFactory.removeSupplyChain(editor));
	actionRegistry.registerAction(ActionFactory.removeAllConnections(editor));
	actionRegistry.registerAction(ActionFactory.mark(editor));
	actionRegistry.registerAction(ActionFactory.unmark(editor));
	actionRegistry.registerAction(ActionFactory.saveImage(editor));
	actionRegistry.registerAction(ActionFactory.expandAll(editor));
	actionRegistry.registerAction(ActionFactory.collapseAll(editor));
	actionRegistry.registerAction(ActionFactory.maximizeAll(editor));
	actionRegistry.registerAction(ActionFactory.minimizeAll(editor));
	actionRegistry.registerAction(ActionFactory.layoutMenu(editor));
	actionRegistry.registerAction(ActionFactory.searchProviders(editor));
	actionRegistry.registerAction(ActionFactory.searchRecipients(editor));
	actionRegistry.registerAction(ActionFactory.open(editor));
	actionRegistry.registerAction(ActionFactory.openMiniatureView(editor));
	actionRegistry.registerAction(ActionFactory.showOutline());
	actionRegistry.registerAction(new ZoomInAction(getZoomManager()));
	actionRegistry.registerAction(new ZoomOutAction(getZoomManager()));
	DeleteAction delAction = new DeleteAction((IWorkbenchPart) editor) {
		@Override
		protected ISelection getSelection() {
			return editor.getSite().getWorkbenchWindow().getSelectionService().getSelection();
		}
	};
	actionRegistry.registerAction(delAction);
}