org.castor.persist.resolver

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 Summary

Methods

Modifier and Type	Method and Description
Object	create(TransactionContext tx, Object object) Create an object of the base class with specified identity into the persistence storage.
void	expireCache(TransactionContext tx, Object field) Inspect the fields stored in the object passed as an argument for contained objects.
void	load(TransactionContext tx, OID oid, ProposedEntity proposedObject, AccessMode suggestedAccessMode) Load an object with specified identity from the persistent storage.
boolean	markCreate(TransactionContext tx, OID oid, Object object) Walk the object model and mark object that should be created.
void	markDelete(TransactionContext tx, Object object, Object field) Prepare to delete an object with the specified identity.
Object	postCreate(TransactionContext tx, OID oid, Object object, Object field, Identity createdId) Called after successful creation of an object of the base class.
UpdateFlags	preStore(TransactionContext tx, OID oid, Object object, int timeout, Object field) Check the object for modification.
UpdateAndRemovedFlags	removeRelation(TransactionContext tx, Object object, ClassMolder relatedMolder, Object relatedObject) Remove the reference of a related object from an object of the base class.
void	revertObject(TransactionContext tx, OID oid, Object object, Object field) 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.
Object	store(TransactionContext tx, Object object, Object field) Store a data object into the persistent storage of the base class of this ClassMolder.
void	update(TransactionContext tx, OID oid, Object object, AccessMode suggestedAccessMode, Object field) Update the object which loaded or created in the other transaction to the persistent storage.
Object	updateCache(TransactionContext tx, OID oid, Object object) Update the dirty checking cache.
boolean	updateWhenNoTimestampSet(TransactionContext tx, OID oid, Object object, AccessMode suggestedAccessMode) Update the object which loaded or created in the other transaction to the persistent storage.

Method Detail

create

Object create(TransactionContext tx,
            Object object)
              throws PersistenceException

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.