net.sf.jso.storage
Class JSODataManager

java.lang.Object
  net.sf.jso.storage.JSODataManager

All Implemented Interfaces:

DataManager

public class JSODataManager

extends java.lang.Object

implements DataManager

Manager responsible for object data storage.

Constructor Summary

JSODataManager(int cacheSize)
Constructs the data manager.

Method Summary

void	createObject(ObjectFieldData data, StorableClass cls, Transaction tx) Creates an object with suplied data.
void	deleteObject(OID oid, StorableClass cls, Transaction tx) Deletes an object.
CacheInfo	getCacheInfo() Gets cache information.
void	invalidate() Invalidates all cached data.
void	invalidate(java.lang.Class cls) Invalidates cached data of all objects of a class.
void	invalidate(OID oid) Invalidates cached data of an object.
ObjectFieldData	readObject(OID oid, boolean summary, StorableClass cls, Transaction tx) Reads an object's data.
boolean	updateObject(ObjectFieldData data, StorableClass cls, Transaction tx) Updates object's data.

Methods inherited from class java.lang.Object

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

Constructor Detail

JSODataManager

public JSODataManager(int cacheSize)

Constructs the data manager.

Method Detail

createObject

public void createObject(ObjectFieldData data,
                         StorableClass cls,
                         Transaction tx)
                  throws java.sql.SQLException,
                         StorageException

Creates an object with suplied data.

Specified by:

createObject in interface DataManager

Parameters:

data - Object's data.

cls - Object's class.

tx - Transaction within which the operation will be made.

Throws:

java.sql.SQLException

StorageException

readObject

public ObjectFieldData readObject(OID oid,
                                  boolean summary,
                                  StorableClass cls,
                                  Transaction tx)
                           throws java.sql.SQLException,
                                  StorageException

Reads an object's data.

Specified by:

readObject in interface DataManager

Parameters:

oid - Object's identification.

summary - Indicates if only summary should be read.

cls - Object's class.

tx - Transaction within which the operation will be made.

Returns:

Object's data.

Throws:

java.sql.SQLException

StorageException

updateObject

public boolean updateObject(ObjectFieldData data,
                            StorableClass cls,
                            Transaction tx)
                     throws java.sql.SQLException,
                            StorageException

Updates object's data.

Specified by:

updateObject in interface DataManager

Parameters:

data - Object's data.

cls - Object's class.

tx - Transaction within which the operation will be made.

Returns:

If object has been updated in database.

Throws:

java.sql.SQLException

StorageException

deleteObject

public void deleteObject(OID oid,
                         StorableClass cls,
                         Transaction tx)
                  throws java.sql.SQLException,
                         StorageException

Deletes an object.

Specified by:

deleteObject in interface DataManager

Parameters:

oid - Object's identification.

cls - Object's class.

tx - Transaction within which the operation will be made.

Throws:

java.sql.SQLException

StorageException

invalidate

public void invalidate()

Invalidates all cached data.

Specified by:

invalidate in interface DataManager

invalidate

public void invalidate(OID oid)

Invalidates cached data of an object.

Specified by:

invalidate in interface DataManager

Parameters:

oid - Object's identification.

invalidate

public void invalidate(java.lang.Class cls)

Invalidates cached data of all objects of a class.

Specified by:

invalidate in interface DataManager

Parameters:

cls - Object's class.

getCacheInfo

public CacheInfo getCacheInfo()

Gets cache information.

Specified by:

getCacheInfo in interface DataManager

Returns:

Information about the cache.