Package org.datanucleus.store.rdbms.scostore

Class AbstractCollectionStore<E>

  • All Implemented Interfaces:
    org.datanucleus.store.types.scostore.CollectionStore<E>, org.datanucleus.store.types.scostore.Store
    Direct Known Subclasses:
    AbstractListStore, AbstractSetStore
    public abstract class AbstractCollectionStore<E>
extends ElementContainerStore
implements org.datanucleus.store.types.scostore.CollectionStore<E>
    Abstract representation of a store of a Collection. Contains all common parts of storing Sets and Lists.

    • Field Detail

      • containsStmt

        protected String containsStmt

    • Constructor Detail

      • AbstractCollectionStore

        protected AbstractCollectionStore​(RDBMSStoreManager storeMgr,
                                  org.datanucleus.ClassLoaderResolver clr)
        Constructor.
        Parameters:
        storeMgr - Manager for the store
        clr - ClassLoader resolver

    • Method Detail

      • updateEmbeddedElement

        public boolean updateEmbeddedElement​(org.datanucleus.state.ObjectProvider op,
                                     E element,
                                     int fieldNumber,
                                     Object value)
        Method to update a field of an embedded element.
        Specified by:
        updateEmbeddedElement in interface org.datanucleus.store.types.scostore.CollectionStore<E>
        Parameters:
        op - ObjectProvider of the owner
        element - The element to update
        fieldNumber - The number of the field to update
        value - The value
        Returns:
        true if the datastore was updated

      • update

        public void update​(org.datanucleus.state.ObjectProvider op,
                   Collection coll)
        Method to update the collection to be the supplied collection of elements.
        Specified by:
        update in interface org.datanucleus.store.types.scostore.CollectionStore<E>
        Parameters:
        op - ObjectProvider of the object
        coll - The collection to use

      • contains

        public boolean contains​(org.datanucleus.state.ObjectProvider op,
                        Object element)
        Method to verify if the specified element is contained in this collection.
        Specified by:
        contains in interface org.datanucleus.store.types.scostore.CollectionStore<E>
        Parameters:
        op - ObjectProvider
        element - The element
        Returns:
        Whether it contains the element

      • updateEmbeddedElement

        public boolean updateEmbeddedElement​(org.datanucleus.state.ObjectProvider op,
                                     E element,
                                     int fieldNumber,
                                     Object value,
                                     JavaTypeMapping fieldMapping)

      • getUpdateEmbeddedElementStmt

        protected String getUpdateEmbeddedElementStmt​(JavaTypeMapping fieldMapping)
        Generate statement for update the field of an embedded element. 
         UPDATE SETTABLE
 SET EMBEDDEDFIELD1 = ?
 WHERE OWNERCOL=?
 AND ELEMENTCOL = ?
        Parameters:
        fieldMapping - The mapping for the field within the embedded object to be updated
        Returns:
        Statement for updating an embedded element in the Set

      • getRemoveStmt

        protected String getRemoveStmt​(Object element)
        Generate statement for removing an element from the Collection. 
         DELETE FROM COLLTABLE WHERE OWNERCOL=? AND ELEMENTCOL = ?
        Parameters:
        element - The element to remove
        Returns:
        Statement for deleting an item from the Collection.