import org.eclipse.jface.text.information.IInformationProviderExtension2; //导入依赖的package包/类
private static IInformationControlCreator getInformationPresenterControlCreator(ITextHover hover) {
	if (hover instanceof IInformationProviderExtension2) // this is wrong, but left here for backwards compatibility
		return ((IInformationProviderExtension2)hover).getInformationPresenterControlCreator();

	if (hover instanceof AbstractJavaEditorTextHover) {
		return ((AbstractJavaEditorTextHover) hover).getInformationPresenterControlCreator();
	}
	return null;
}
 

import org.eclipse.jface.text.information.IInformationProviderExtension2; //导入依赖的package包/类
@Override
public IInformationControlCreator getInformationPresenterControlCreator() {
	if (ensureHoverCreated()) {
		if (fHover instanceof IInformationProviderExtension2) // this is wrong, but left here for backwards compatibility
			return ((IInformationProviderExtension2) fHover).getInformationPresenterControlCreator();
	}

	return null;
}
 

import org.eclipse.jface.text.information.IInformationProviderExtension2; //导入依赖的package包/类
@Override
public IInformationControlCreator getInformationPresenterControlCreator() {
	if(editorHover instanceof IInformationProviderExtension2) {
		IInformationProviderExtension2 infProviderControlCreator = (IInformationProviderExtension2) editorHover;
		return infProviderControlCreator.getInformationPresenterControlCreator();
	}
	return editorHover.getHoverControlCreator();
}