ojb.odmg
Class OJB

java.lang.Object
  |
  +--ojb.odmg.OJB

All Implemented Interfaces:

Implementation

public final class OJB

extends java.lang.Object

implements Implementation

Facade to the persistence ObjectServer system. Implements the factory interface for a particular ODMG implementation.

Version:

ODMG 3.0

Author:

Thomas Mahler

Method Summary

Transaction	currentTransaction() Get the current Transaction for the thread.
Database	getDatabase(java.lang.Object obj) Get the Database that contains the object obj.
static OJB	getInstance() return singleton instance
static Logger	getLogger()
java.lang.String	getObjectId(java.lang.Object obj) Get a String representation of the object's identifier.
DArray	newDArray() Create a new DArray object.
Database	newDatabase() Create a new Database object.
DBag	newDBag() Create a new DBag object.
DList	newDList() Create a new DList object.
DMap	newDMap() Create a new DMap object.
DSet	newDSet() Create a new DSet object.
OQLQuery	newOQLQuery() Create a new OQLQuery object.
Transaction	newTransaction() Create a Transaction object and associate it with the current thread.
(package private) void	setCurrentDatabase(DatabaseImpl curDB) Method declaration

Methods inherited from class java.lang.Object

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

Method Detail

newTransaction

public Transaction newTransaction()

Create a Transaction object and associate it with the current thread.

Specified by:

newTransaction in interface Implementation

Returns:

The newly created Transaction instance.

See Also:

Transaction

currentTransaction

public Transaction currentTransaction()

Get the current Transaction for the thread.

Specified by:

currentTransaction in interface Implementation

Returns:

The current Transaction object or null if there is none.

See Also:

Transaction

newDatabase

public Database newDatabase()

Create a new Database object.

Specified by:

newDatabase in interface Implementation

Returns:

The new Database object.

See Also:

Database

newOQLQuery

public OQLQuery newOQLQuery()

Create a new OQLQuery object.

Specified by:

newOQLQuery in interface Implementation

Returns:

The new OQLQuery object.

See Also:

OQLQuery

newDList

public DList newDList()

Create a new DList object.

Specified by:

newDList in interface Implementation

Returns:

The new DList object.

See Also:

DList

newDBag

public DBag newDBag()

Create a new DBag object.

Specified by:

newDBag in interface Implementation

Returns:

The new DBag object.

See Also:

DBag

newDSet

public DSet newDSet()

Create a new DSet object.

Specified by:

newDSet in interface Implementation

Returns:

The new DSet object.

See Also:

DSet

newDArray

public DArray newDArray()

Create a new DArray object.

Specified by:

newDArray in interface Implementation

Returns:

The new DArray object.

See Also:

DArray

newDMap

public DMap newDMap()

Create a new DMap object.

Specified by:

newDMap in interface Implementation

Returns:

The new DMap object.

See Also:

DMap

getObjectId

public java.lang.String getObjectId(java.lang.Object obj)

Get a String representation of the object's identifier. OJB returns the serialized Identity of the object.

Specified by:

getObjectId in interface Implementation

Parameters:

obj - The object whose identifier is being accessed.

Returns:

The object's identifier in the form of a String

getDatabase

public Database getDatabase(java.lang.Object obj)

Get the Database that contains the object obj.

Specified by:

getDatabase in interface Implementation

Parameters:

obj - The object.

Returns:

The Database that contains the object. If obj.getClass() is defined in the repository return current db else throw exception, as we can't tell where unknown classes reside

getInstance

public static OJB getInstance()

return singleton instance

getLogger

public static Logger getLogger()

setCurrentDatabase

void setCurrentDatabase(DatabaseImpl curDB)

Method declaration

Parameters:

curDB -