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public interface ContentFileDbPersister
This interface describes the set of methods that all database persisters for
Content
objects must implement.
A database persister allows an object to be stored (either inserted or updated)
within the database or to be deleted from the database. Persisting methods
are named according to the type of persistence that is performed.
Nested Class Summary | |
---|---|
static class |
ContentFileDbPersister.Default
A utility class that provides quick access to the ContentDbPersister
instance associated with the default instance of the database BbPersistenceManager . |
Field Summary | |
---|---|
static java.lang.String |
TYPE
Type used to obtain an instance of the class configured to provide the implementation for this interface. |
Method Summary | |
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void |
deleteById(Id id)
Deletes the Content identified by the given Id
value using a connection from the associated persistence manager's
database container. |
void |
deleteById(Id id,
java.sql.Connection con)
Deletes the Content identified by the given Id
value using the supplied connection. |
void |
persist(ContentFile target)
Inserts or updates the supplied Content using a
connection from the associated persistence manager's database container. |
void |
persist(ContentFile target,
java.sql.Connection con)
Inserts or updates the supplied Content using the
supplied connection. |
Methods inherited from interface blackboard.persist.Persister |
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getAppVersion, init |
Field Detail |
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static final java.lang.String TYPE
BbPersistenceManager.getPersister(String)
.
Method Detail |
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void persist(ContentFile target) throws ValidationException, PersistenceException
Content
using a
connection from the associated persistence manager's database container.
If the object's Id is set and is associated with the same container, then
an update is done, otherwise a new object is inserted.
target
- Object to store.
ValidationException
- if the object is not in a consistent state
to be persisted.
PersistenceException
- if some other exception happens while
persisting the object.void persist(ContentFile target, java.sql.Connection con) throws ValidationException, PersistenceException
Content
using the
supplied connection. The connection must be to the same database as is
used by the associated persistence manager. If the object's Id is set and
is associated with this persistence manager's same container, then an
update is done, otherwise a new object is inserted.
target
- Object to store.con
- Database connection to use. This may be null
ValidationException
- if the object is not in a consistent state
to be persisted.
PersistenceException
- if some other exception happens while
persisting the object.void deleteById(Id id) throws KeyNotFoundException, PersistenceException
Content
identified by the given Id
value using a connection from the associated persistence manager's
database container. Note that deletes are always "deep". That means that if
the object specified by id
is a folder or lesson, all contained
objects will also be deleted.
id
- Id of the object to delete.
KeyNotFoundException
- if an object with the given Id
value can not be found
PersistenceException
- if some other exception happens during the
delete operationvoid deleteById(Id id, java.sql.Connection con) throws KeyNotFoundException, PersistenceException
Content
identified by the given Id
value using the supplied connection. Note that deletes are always "deep".
That means that if the object specified by id
is a folder or lesson, all
contained objects will also be deleted.
id
- id of the object to deletecon
- Database connection to use. This may be null
KeyNotFoundException
- if an object with the given Id
value can not be found
PersistenceException
- if some other exception happens during the
delete operation
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