程序包 org.hibernate.engine.loading.internal

类 CollectionLoadContext

  • public class CollectionLoadContext
extends Object
    Represents state associated with the processing of a given ResultSet in regards to loading collections.

    Another implementation option to consider is to not expose ResultSets directly (in the JDBC redesign) but to always "wrap" them and apply a [series of] context[s] to that wrapper.

    作者:
    Steve Ebersole

    • 构造器详细资料

      • CollectionLoadContext

        public CollectionLoadContext​(LoadContexts loadContexts,
                             ResultSet resultSet)
        Creates a collection load context for the given result set.
        参数:
        loadContexts - Callback to other collection load contexts.
        resultSet - The result set this is "wrapping".

    • 方法详细资料

      • getResultSet

        public ResultSet getResultSet()

      • getLoadingCollection

        public PersistentCollection getLoadingCollection​(CollectionPersister persister,
                                                 Serializable key)
        Retrieve the collection that is being loaded as part of processing this result set.

        Basically, there are two valid return values from this method:

        • an instance of PersistentCollection which indicates to continue loading the result set row data into that returned collection instance; this may be either an instance already associated and in the midst of being loaded, or a newly instantiated instance as a matching associated collection was not found.
        • null indicates to ignore the corresponding result set row data relating to the requested collection; this indicates that either the collection was found to already be associated with the persistence context in a fully loaded state, or it was found in a loading state associated with another result set processing context.
        参数:
        persister - The persister for the collection being requested.
        key - The key of the collection being requested.
        返回:
        The loading collection (see discussion above).

      • endLoadingCollections

        public void endLoadingCollections​(CollectionPersister persister)
        Finish the process of collection-loading for this bound result set. Mainly this involves cleaning up resources and notifying the collections that loading is complete.
        参数:
        persister - The persister for which to complete loading.