Constructor Detail

• HighLowKeyGenerator

  public HighLowKeyGenerator​(PersistenceFactory factory,
                             java.util.Properties params,
                             int sqlType)
                      throws MappingException

  Initialize the HIGH-LOW key generator.

  Parameters:

  factory - A PersistenceFactory instance.

  params - Database engine specific parameters.

  sqlType - A SQLTypidentifier.

  Throws:

  MappingException - if this key generator is not compatible with the persistance factory.

Method Detail

• initFromParameters

  public void initFromParameters​(java.util.Properties params)
                          throws MappingException

  Method to init some class variables.

  Parameters:

  params - Database engine specific parameters.

  Throws:

  MappingException - if this key generator is not compatible with the persistance factory.

• generateKey

  public java.lang.Object generateKey​(java.sql.Connection conn,
                                      java.lang.String tableName,
                                      java.lang.String primKeyName)
                               throws PersistenceException

  Generate a new key for the specified table. This method is called when a new object is about to be created. In some environments the name of the owner of the object is known, e.g. the principal in a J2EE server. This method is never called for DURING_INSERT key generators.

  Parameters:

  conn - An open connection within the given transaction

  tableName - The table name

  primKeyName - The primary key name

  Returns:

  A new key

  Throws:

  PersistenceException - An error occured talking to persistent storage

• isInSameConnection

  public boolean isInSameConnection()

  Is key generated in the same connection as INSERT? For DURING_INSERT style this method is never called.

  Returns:

  {code}True{code} If this instance is in same JDBC Connection.