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, MapValueCollectionStore
    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 java.lang.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

      • update

        public void update​(org.datanucleus.state.DNStateManager sm,
                   java.util.Collection<? extends E> coll)
        Specified by:
        update in interface org.datanucleus.store.types.scostore.CollectionStore<E>

      • contains

        public boolean contains​(org.datanucleus.state.DNStateManager sm,
                        java.lang.Object element)
        Specified by:
        contains in interface org.datanucleus.store.types.scostore.CollectionStore<E>

      • getContainsStmt

        private java.lang.String getContainsStmt​(java.lang.Object element)
        Generate statement for retrieving the contents of the Collection. The discriminator part is only present when the element type has inheritance strategy of "superclass-table" and is Inverse. 
         SELECT OWNERCOL FROM COLLECTIONTABLE
 WHERE OWNERCOL=?
 AND ELEMENTCOL=?
 [AND DISCRIMINATOR=?]
 [AND RELATION_DISCRIM=?]
        Returns:
        Statement for retrieving the contents of the Collection.

      • getContainsStatementString

        private java.lang.String getContainsStatementString​(java.lang.Object element)

      • getRemoveStmt

        protected java.lang.String getRemoveStmt​(java.lang.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.

      • getRemoveStatementString

        private java.lang.String getRemoveStatementString​(java.lang.Object element)

      • updateEmbeddedElement

        public boolean updateEmbeddedElement​(org.datanucleus.state.DNStateManager sm,
                                     E element,
                                     int fieldNumber,
                                     java.lang.Object value)
        Method to update a field of an embedded element.
        Specified by:
        updateEmbeddedElement in interface org.datanucleus.store.types.scostore.CollectionStore<E>
        Parameters:
        sm - StateManager 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

      • getUpdateEmbeddedElementStmt

        protected java.lang.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