Interface RelationshipManager

All Known Implementing Classes:
RelationshipManagerImpl
public interface RelationshipManager
Manager for (bidirectional) relationships of an object (StateManager). Designed as a stand-alone process to run just before flush. Updates on bidirectional relations are registered during the persistence process. Call to checkConsistency() will check for consistency and throw exceptions as appropriate. Call to process() will perform updates at the other side of the registered relations so all is consistent. TODO Cater for Map put/remove calls TODO Consider sharing info with org.datanucleus.flush.OperationQueue which holds similar information (but only when optimistic)

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    checkConsistency()
    Method to check for consistency the managed relations of this object with the related objects.
    void
    clearFields()
    Convenience method to clear all fields from being managed.
    boolean
    managesField(int fieldNumber)
    Accessor for whether a field is being managed.
    void
    process()
    Method to process the (bidirectional) relations for this object.
    void
    relationAdd(int fieldNumber, Object val)
    Method to register a change in the contents of a container field, with an object being added.
    void
    relationChange(int fieldNumber, Object oldValue, Object newValue)
    Method that is called when the user calls setXXX() on a field.
    void
    relationRemove(int fieldNumber, Object val)
    Method to register a change in the contents of a container field, with an object being removed.

  • Method Details

    • clearFields

      void clearFields()
      Convenience method to clear all fields from being managed.

    • relationChange

      void relationChange(int fieldNumber, Object oldValue, Object newValue)
      Method that is called when the user calls setXXX() on a field.
      Parameters:
      fieldNumber - Number of the field
      oldValue - The old value
      newValue - The new value

    • relationAdd

      void relationAdd(int fieldNumber, Object val)
      Method to register a change in the contents of a container field, with an object being added.
      Parameters:
      fieldNumber - Number of the field
      val - Value being added

    • relationRemove

      void relationRemove(int fieldNumber, Object val)
      Method to register a change in the contents of a container field, with an object being removed.
      Parameters:
      fieldNumber - Number of the field
      val - Value being removed

    • managesField

      boolean managesField(int fieldNumber)
      Accessor for whether a field is being managed.
      Parameters:
      fieldNumber - Number of the field
      Returns:
      Whether it is currently managed

    • checkConsistency

      void checkConsistency()
      Method to check for consistency the managed relations of this object with the related objects.

    • process

      void process()
      Method to process the (bidirectional) relations for this object.