kodo.jdbc.schema
Interface SequenceFactory

All Known Implementing Classes:

ClassSequenceFactory, DBSequenceFactory, SimpleSequenceFactory

public interface SequenceFactory

An implementation of the SequenceFactory interface is used to generate unique primary key values for newly persisted JDO instances. Multiple sequence factories may be used during the lifetime of a JDO application. Most sequence factories will probably implement Configurable to receive the system configuration on construction.

Method Summary

void	addSchema(ClassMapping mapping, SchemaGroup group) Add any tables, etc needed by this factory for the given mapping to the given schema group, if they do not exist already.
long	getNext(ClassMapping mapping, DataSource ds) Return a unique primary key value.

Method Detail

addSchema

public void addSchema(ClassMapping mapping,
                      SchemaGroup group)

Add any tables, etc needed by this factory for the given mapping to the given schema group, if they do not exist already.

getNext

public long getNext(ClassMapping mapping,
                    DataSource ds)
             throws Exception

Return a unique primary key value.

Parameters:

mapping - metadata on the class of the object being persisted

ds - the data source from which to obtain database connections, if any are needed

Throws:

javax.jdo.JDOException, - or some subclass