org.apache.ojb.broker.util.sequence
Class SequenceManagerMSSQLGuidImpl

java.lang.Object
  org.apache.ojb.broker.util.sequence.AbstractSequenceManager
      org.apache.ojb.broker.util.sequence.SequenceManagerMSSQLGuidImpl

All Implemented Interfaces:

SequenceManager

public class SequenceManagerMSSQLGuidImpl
extends AbstractSequenceManager

An Implementation Class that will retrieve a valid new value for a PK field that is of type 'uniqueidentifier'. Since values for these types are generated through a 'newid()' call to MSSQL Server, this class is only valid for MSSQL Server 7.0 and up.
This SequenceManager can be used for any classes that have their PK defined as a 'uniqueidetifier'

Version:

$Id: SequenceManagerMSSQLGuidImpl.java,v 1.1 2007-08-24 22:17:29 ewestfal Exp $

Author:

Andrew Clute

Field Summary

Fields inherited from class org.apache.ojb.broker.util.sequence.AbstractSequenceManager

GLOBAL_SEQUENCE_NAME, PROPERTY_AUTO_NAMING

Constructor Summary

SequenceManagerMSSQLGuidImpl(PersistenceBroker broker)
Constructor used by SequenceManagerFactory

Method Summary

protected int	getUniqueId(FieldDescriptor field) Returns a new unique int for the given Class and fieldname.
protected long	getUniqueLong(FieldDescriptor field) Returns a new unique int for the given Class and fieldname.
protected String	getUniqueString(FieldDescriptor field) returns a unique String for given field.
Object	getUniqueValue(FieldDescriptor field) Returns a unique object for the given field attribute.

Methods inherited from class org.apache.ojb.broker.util.sequence.AbstractSequenceManager

afterStore, calculateSequenceName, getBrokerForClass, getConfigurationProperties, getConfigurationProperty, getPlatform, setConfigurationProperties, setConfigurationProperty, setReferenceFKs, useAutoNaming

Methods inherited from class java.lang.Object

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

Constructor Detail

SequenceManagerMSSQLGuidImpl

public SequenceManagerMSSQLGuidImpl(PersistenceBroker broker)

Constructor used by SequenceManagerFactory

Parameters:

broker - PB instance to perform the id generation.

Method Detail

getUniqueValue

public Object getUniqueValue(FieldDescriptor field)
                      throws SequenceManagerException

Description copied from class: AbstractSequenceManager

Returns a unique object for the given field attribute. The returned value takes in account the jdbc-type and the FieldConversion.sql2java() conversion defined for field. The returned object is unique accross all tables in the extent of class the field belongs to.

Specified by:

getUniqueValue in interface SequenceManager

Overrides:

getUniqueValue in class AbstractSequenceManager

Throws:

SequenceManagerException

getUniqueString

protected String getUniqueString(FieldDescriptor field)
                          throws SequenceManagerException

returns a unique String for given field. the returned uid is unique accross all tables.

Throws:

SequenceManagerException

getUniqueId

protected int getUniqueId(FieldDescriptor field)
                   throws SequenceManagerException

Returns a new unique int for the given Class and fieldname.

Throws:

SequenceManagerException

getUniqueLong

protected long getUniqueLong(FieldDescriptor field)
                      throws SequenceManagerException

Returns a new unique int for the given Class and fieldname.

Specified by:

getUniqueLong in class AbstractSequenceManager

Throws:

SequenceManagerException