edu.mssm.crover.scentral
Class PersistenceScheme_Serialization_Impl

java.lang.Object
  |
  +--edu.mssm.crover.scentral.PersistenceScheme_Serialization_Impl

All Implemented Interfaces:

PersistenceScheme

public abstract class PersistenceScheme_Serialization_Impl

extends java.lang.Object

implements PersistenceScheme

Serialization persistence scheme. This scheme relies on serialization to save the state of each object into files. It is expected to be less flexible than JDBC. This is the poor man solution. See the JDBC implementation for a better alternative. Not tested after the package reorganization

Field Summary

Fields inherited from interface edu.mssm.crover.scentral.PersistenceScheme

OWNER_REFERENCE_ID, USER_SESSION_KIND

Constructor Summary

PersistenceScheme_Serialization_Impl()

Method Summary

abstract UserSession	createServiceUserSession(UserRecord ur)
void	dropLibraryObjectReference(int object_id, int reference_object_id, UserRecord ur) Drops a reference in the database to this object identified by object_id.
protected java.lang.Object	getInstance(java.lang.String name) Get an instance from the storage directory.
LibraryObjectInfo	getLibraryObjectInfo(int kind, int library_object_id, UserRecord ur) Get a LibraryObjectInfo for a given object kind with the given object ID.
java.util.Collection	getLibraryObjectsInfo(int kind, UserRecord ur) Get an enumeration of instance iterators for browsing purposes.
abstract java.lang.String	getSessionTableName()
UserSession	getUserSession(UserRecord ur) Returns a previously serialized object or a new one if none exists.
void	initialize(Log log) Initialized a PersistenceScheme_Serialization_Impl.
protected void	saveInstance(java.lang.Object instance, java.lang.String name) Save an instance as a file in the storage directory.
void	saveUserSession(UserSession session) Serializes the object in a file and keep track of it.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface edu.mssm.crover.scentral.PersistenceScheme

userLogsIn

Constructor Detail

PersistenceScheme_Serialization_Impl

public PersistenceScheme_Serialization_Impl()

Method Detail

initialize

public void initialize(Log log)

Initialized a PersistenceScheme_Serialization_Impl.

Specified by:

initialize in interface PersistenceScheme

Parameters:

log - The log system where warnings and errors are reported.

createServiceUserSession

public abstract UserSession createServiceUserSession(UserRecord ur)

getSessionTableName

public abstract java.lang.String getSessionTableName()

getUserSession

public UserSession getUserSession(UserRecord ur)

Returns a previously serialized object or a new one if none exists. When userID is "guest" the user session returned is a newly constructed one.

Specified by:

getUserSession in interface PersistenceScheme

saveUserSession

public void saveUserSession(UserSession session)

Serializes the object in a file and keep track of it. When userID is "guest" the user session the user session is not saved.

Specified by:

saveUserSession in interface PersistenceScheme

getInstance

protected java.lang.Object getInstance(java.lang.String name)

Get an instance from the storage directory.

saveInstance

protected void saveInstance(java.lang.Object instance,
                            java.lang.String name)
                     throws BadPersistentID

Save an instance as a file in the storage directory.

BadPersistentID

dropLibraryObjectReference

public void dropLibraryObjectReference(int object_id,
                                       int reference_object_id,
                                       UserRecord ur)

Drops a reference in the database to this object identified by object_id. The object_id referencing the object is reference_object_id. When owner requests to drop an object, the owner is identified by reference_object_id = 0, which could never occur for regular objects. Regular objects have id-s > 0. An object is dropped when all references to it are dropped including the owner reference.

Specified by:

dropLibraryObjectReference in interface PersistenceScheme

getLibraryObjectInfo

public LibraryObjectInfo getLibraryObjectInfo(int kind,
                                              int library_object_id,
                                              UserRecord ur)

Get a LibraryObjectInfo for a given object kind with the given object ID.

Specified by:

getLibraryObjectInfo in interface PersistenceScheme

Returns:

LibraryObjectInfo.

See Also:

LibraryObjectInfo

getLibraryObjectsInfo

public java.util.Collection getLibraryObjectsInfo(int kind,
                                                  UserRecord ur)

Get an enumeration of instance iterators for browsing purposes.

Specified by:

getLibraryObjectsInfo in interface PersistenceScheme

Returns:

Enumeration of LibraryObjectInfo-s.

See Also:

LibraryObjectInfo