public class CustomPropertySheetEntry extends PropertySheetEntry{

	@Override
	protected IPropertySource getPropertySource(Object object) {
		IPropertySource propertySource = super.getPropertySource(object);
		boolean isMultiSelection = getValues().length > 1;
		/*if (propertySource instance CustomModel) { // custom model implements IPropertySource
			customModel.setMultiSelectionMode(isMultiSelection)
			// inside custom model class    getPropertyDescriptors() method
			  if (!isMultiSelection) {
			    //add single properties here like name
			  } 
			
		}*/
		return propertySource;
	}
	
	/**
	 *  In getAdapter method of view or editor
	 * 
	 * if (type == IPropertySheetPage.class) {
			PropertySheetPage propertySheetPage = new PropertySheetPage();
			CustomPropertySheetEntry customPropertySheetEntry = new CustomPropertySheetEntry();
			propertySheetPage.setRootEntry(customPropertySheetEntry);
			return propertySheetPage;
		}
	 * 
	 */
	
}

if (type == org.eclipse.ui.views.properties.IPropertySheetPage.class) {
			PropertySheetPage page = new PropertySheetPage();
			page.setRootEntry(new UndoablePropertySheetEntry(getCommandStack()));
			return page;
		}