org.castor.cpa.persistence.sql.keygen
Class AbstractAfterKeyGenerator

java.lang.Object
  org.castor.cpa.persistence.sql.keygen.AbstractKeyGenerator
      org.castor.cpa.persistence.sql.keygen.AbstractAfterKeyGenerator

All Implemented Interfaces:

KeyGenerator

Direct Known Subclasses:

IdentityKeyGenerator, SequenceAfterKeyGenerator

public abstract class AbstractAfterKeyGenerator
extends AbstractKeyGenerator

Abstract class that implements the KeyGenerator interface for AFTER_INSERT style. The key generator is used for producing identities for objects before they are created in the database.

Version:

$Revision$ $Date: 2009-07-13 17:22:43 (Tue, 28 Jul 2009) $

Author:

Ahmad Hassan, Ralf Joachim

Constructor Summary

AbstractAfterKeyGenerator(PersistenceFactory factory, Properties params)
Constructor.

Method Summary

KeyGenerator	buildStatement(SQLEngine engine) Builds the SQL insert statement.
Object	executeStatement(Database database, Connection conn, Identity identity, ProposedEntity entity) Executes the SQL statement after preparing the PreparedStatement.

Methods inherited from class org.castor.cpa.persistence.sql.keygen.AbstractKeyGenerator

closeSeparateConnection, getSeparateConnection

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.castor.cpa.persistence.sql.keygen.KeyGenerator

generateKey, isInSameConnection

Constructor Detail

AbstractAfterKeyGenerator

public AbstractAfterKeyGenerator(PersistenceFactory factory,
                                 Properties params)

Constructor.

Parameters:

factory - Persistence factory for the database engine the entity is persisted in. Used to format the SQL statement

params - Parameters for key generator.

Method Detail

buildStatement

public KeyGenerator buildStatement(SQLEngine engine)

Builds the SQL insert statement.

Parameters:

engine - SQL engine for all persistence operations at entities of the type this class is responsible for. Holds all required information of the entity type.

Returns:

KeyGenerator

executeStatement

public Object executeStatement(Database database,
                               Connection conn,
                               Identity identity,
                               ProposedEntity entity)
                        throws PersistenceException

Executes the SQL statement after preparing the PreparedStatement.

Parameters:

database - A database instance.

conn - An Open JDBC connection.

identity - Identity of the object to insert.

entity - Entity instance from which field values to be fetached to bind with sql insert statement.

Returns:

Identity

Throws:

PersistenceException - If failed to insert record into database. This could happen if a database access error occurs, If identity size mismatches, unable to retrieve Identity, If provided Identity is null, If Extended engine is null.