Interface ResolverStrategy

All Known Implementing Classes:
BaseRelationResolver, ManyRelationResolver, ManyToManyRelationResolver, OneToManyRelationResolver, PersistanceCapableRelationResolver, PrimitiveResolver, SerializableResolver

public interface ResolverStrategy
Strategy pattern to allow for common operations related to field resolution based upon the type of the field.
Since:
0.9.9
Author:
Werner Guttmann
  • Method Details

    • create

      Create an object of the base class with specified identity into the persistence storage.
      Parameters:
      tx - transaction in action
      object - the object to be created
      Returns:
      the identity of the object
      Throws:
      PersistenceException
    • postCreate

      Object postCreate(TransactionContext tx, OID oid, Object object, Object field, Identity createdId) throws PersistenceException
      Called after successful creation of an object of the base class.
      Parameters:
      tx - transaction in action
      oid - the object identity of the object to be created.
      object - the object to be created
      field - The field value as returned by the SQLEngine
      createdId - ???
      Returns:
      the identity of the object
      Throws:
      PersistenceException
    • markCreate

      boolean markCreate(TransactionContext tx, OID oid, Object object) throws PersistenceException
      Walk the object model and mark object that should be created.
      Parameters:
      tx - transaction in action
      oid - the object identity of the object to be created.
      object - the object to be created
      Returns:
      true if there's objects that should be created
      Throws:
      PersistenceException
    • preStore

      UpdateFlags preStore(TransactionContext tx, OID oid, Object object, int timeout, Object field) throws PersistenceException
      Check the object for modification. If dpendent object is dereferenced, it method will remove the object thru the transaction. If an related object is dereferenced, it method will make sure the formally object will be dereferenced from the other side as well. This method is called in prepare (for commit) state of the transaction. This method indicates if the object needed to be persist or cache should be update using TransactionContext.markDelete.
      Parameters:
      tx - transaction in action
      oid - the object identity of the object
      object - the data object to be checked
      timeout - timeout of updating the lock if needed
      field - The field value as returned by the SQLEngine
      Returns:
      true if the object is modified
      Throws:
      PersistenceException - If it is not possible to successfully complete this method.
    • store

      Object store(TransactionContext tx, Object object, Object field) throws PersistenceException
      Store a data object into the persistent storage of the base class of this ClassMolder.
      Parameters:
      tx - Transaction in action
      object - the object to be stored
      field - The field value as returned by the SQLEngine
      Throws:
      PersistenceException
    • update

      void update(TransactionContext tx, OID oid, Object object, AccessMode suggestedAccessMode, Object field) throws PersistenceException
      Update the object which loaded or created in the other transaction to the persistent storage.
      Parameters:
      tx - Transaction in action
      oid - the object identity of the stored object
      object - the object to be stored
      suggestedAccessMode - Suggested access mode
      field - The field value as returned by the SQLEngine
      Throws:
      PersistenceException - If it is not possible to successfully complete this method.
    • updateWhenNoTimestampSet

      boolean updateWhenNoTimestampSet(TransactionContext tx, OID oid, Object object, AccessMode suggestedAccessMode) throws PersistenceException
      Update the object which loaded or created in the other transaction to the persistent storage.
      Parameters:
      tx - Transaction in action
      oid - the object identity of the stored object
      object - the object to be stored
      suggestedAccessMode - Suggested access mode
      Returns:
      TODO
      Throws:
      PersistenceException - If it is not possible to successfully complete this method.
    • updateCache

      Object updateCache(TransactionContext tx, OID oid, Object object)
      Update the dirty checking cache. This method is called after a transaction completed successfully.
      Parameters:
      tx - - transaction in action
      oid - - object's identity of the target object
      object - - the target object
      Returns:
      The object tha twas stored in the cache previously.
    • markDelete

      void markDelete(TransactionContext tx, Object object, Object field) throws PersistenceException
      Prepare to delete an object with the specified identity. If any sub-object should be deleted along with the target object, it should be deleted by this method.
      Parameters:
      tx - - transaction in action
      object - - the target object
      field - The field value as returned by the SQLEngine
      Throws:
      PersistenceException - If it is not possible to successfully complete this method.
    • revertObject

      void revertObject(TransactionContext tx, OID oid, Object object, Object field) throws PersistenceException
      Revert the object back to the state of begining of the transaction If the object is loaded, it will be revert as it was loaded. If the object is created, it will be revert as it was just created.
      Parameters:
      tx - - transaction in action
      oid - - the object identity of the target object
      field - The field value as returned by the SQLEngine
      object - - the target object
      Throws:
      PersistenceException - If it is not possible to successfully complete this method.
    • expireCache

      void expireCache(TransactionContext tx, Object field) throws PersistenceException
      Inspect the fields stored in the object passed as an argument for contained objects. Request an expireCache for each contained object.
      Parameters:
      tx - The TransactionContext
      field - The field value as returned by the SQLEngine
      Throws:
      PersistenceException - If it is not possible to successfully complete this method.
    • load

      void load(TransactionContext tx, OID oid, ProposedEntity proposedObject, AccessMode suggestedAccessMode) throws PersistenceException
      Load an object with specified identity from the persistent storage.
      Parameters:
      tx - the TransactionContext in action
      oid - the object identity of the desired object
      proposedObject - Object holder storing information about assumed and actual object instances.
      suggestedAccessMode - the acessMode for the object
      Throws:
      PersistenceException - If it is not possible to successfully complete this method.
    • removeRelation

      UpdateAndRemovedFlags removeRelation(TransactionContext tx, Object object, ClassMolder relatedMolder, Object relatedObject)
      Remove the reference of a related object from an object of the base class.

      If the related object is PersistanceCapable, the field will be set null. If the related object is a Collection, then the related object will be removed from the Collection.

      If any changed occured, transactionContext.markModified will be called, to indicate the object is modified.

      It method will iterate thur all of the object's field and try to remove all the occurrence.

      Parameters:
      tx - the TransactionContext of the transaction in action
      object - the target object of the base type of this ClassMolder
      relatedMolder - the ClassMolder of the related object to be removed from the object
      relatedObject - the object to be removed
      Returns:
      Various flags related to updating/removing object instances.