QueryUtils.java 文件源码

@SuppressWarnings("unchecked")
public static <R> Type<R> getElementType(Attribute<?, ?> attr) {
    if (attr instanceof SingularAttribute) {
        return ((SingularAttribute<?,R>) attr).getType();
    } else {
        return ((PluralAttribute<?,?,R>)attr).getElementType();
    }
}