类 AbstractCollectionReference

    • 方法详细资料

      • allowElementJoin

        public boolean allowElementJoin()
        从接口复制的说明: CollectionReference
        Should a collection element join be allowed? Returning true indicates that an element join can safely be added.
        指定者:
        allowElementJoin 在接口中 CollectionReference
        返回:
        true, if a collection index join is allowed.
      • allowIndexJoin

        public boolean allowIndexJoin()
        从接口复制的说明: CollectionReference
        Should a collection index join be allowed? Returning true indicates that an index join can safely be added.
        指定者:
        allowIndexJoin 在接口中 CollectionReference
        返回:
        true, if a collection index join is allowed.
      • getIndexGraph

        public CollectionFetchableIndex getIndexGraph()
        从接口复制的说明: CollectionReference
        Retrieve the metadata about the index of this collection *as a FetchSource*. Will return null when:
        • the collection is not indexed
        • the index is not a composite, entity, or "any" (cannot act as a FetchSource)

        Works only for map keys, since a List index (int type) cannot act as a FetchSource.

        指定者:
        getIndexGraph 在接口中 CollectionReference
        返回:
        The collection index metadata as a FetchSource, or null.
      • getElementGraph

        public CollectionFetchableElement getElementGraph()
        从接口复制的说明: CollectionReference
        Retrieve the metadata about the elements of this collection *as a FetchSource*. Will return null when the element is not a composite, entity, or "any" (cannot act as a FetchSource). Works only for map keys, since a List index cannot be anything other than an int which cannot be a FetchSource.

        指定者:
        getElementGraph 在接口中 CollectionReference
        返回:
        The collection element metadata as a FetchSource, or null.