com.ashridgetech.prevdb.store
Interface Loader

public interface Loader

The callback interface which a PrevDb provides to a SystemStore to allow it to load and save objects.

Method Summary

void	applyTransaction(Transaction tran) Reapply the effects of a Transaction to the PrevDb.
Iterator	getObjects(Class persistentClass) Get an Iterator over a set of FieldMaps for all the objects of a class
Collection	getPersistentClasses() Get the collection of persistent object classes.
void	loadObject(FieldMap fieldMap) Load a persistent object into the PrevDb.

Method Detail

loadObject

public void loadObject(FieldMap fieldMap)
                throws DataException

Load a persistent object into the PrevDb.

Parameters:

fieldMap - the fields of the object to load.

DataException

applyTransaction

public void applyTransaction(Transaction tran)
                      throws DataException

Reapply the effects of a Transaction to the PrevDb.

Parameters:

tran - the Transaction to reapply.

DataException

getPersistentClasses

public Collection getPersistentClasses()

Get the collection of persistent object classes.

Returns:

the collection of classes

getObjects

public Iterator getObjects(Class persistentClass)

Get an Iterator over a set of FieldMaps for all the objects of a class

Parameters:

persistentClass - the class of object to get

Returns:

the Iterator