com.samskivert.jdbc.depot
Class TableValueGenerator

java.lang.Object
  com.samskivert.jdbc.depot.ValueGenerator
      com.samskivert.jdbc.depot.TableValueGenerator

public class TableValueGenerator
extends ValueGenerator

Generates primary keys using an external table .

Field Summary

protected boolean	_initialized
protected String	_pkColumnName
protected String	_pkColumnValue
protected String	_valueColumnName
protected String	_valueTable

Fields inherited from class com.samskivert.jdbc.depot.ValueGenerator

_allocationSize, _dm, _fm, _initialValue, _migrateIfExists

Constructor Summary

TableValueGenerator(TableGenerator tg, GeneratedValue gv, DepotMarshaller<?> dm, FieldMarshaller<?> fm)

Method Summary

protected static String	defStr(String value, String def) Convenience function to return a value or a default fallback.
void	delete(Connection conn, DatabaseLiaison liaison) Delete all database entities associated with this value generator.
void	init(Connection conn, DatabaseLiaison liaison) Ensures the generator is prepared for operation, creating it (only) if necessary.
boolean	isPostFactum() If true, this key generator will be run after the insert statement, if false, it will be run before.
int	nextGeneratedValue(Connection conn, DatabaseLiaison liaison) Fetch/generate the next primary key value.

Methods inherited from class com.samskivert.jdbc.depot.ValueGenerator

getDepotMarshaller, getFieldMarshaller, getFieldMaximum

Methods inherited from class java.lang.Object

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

Field Detail

_initialized

protected boolean _initialized

_valueTable

protected String _valueTable

_pkColumnName

protected String _pkColumnName

_pkColumnValue

protected String _pkColumnValue

_valueColumnName

protected String _valueColumnName

Constructor Detail

TableValueGenerator

public TableValueGenerator(TableGenerator tg,
                           GeneratedValue gv,
                           DepotMarshaller<?> dm,
                           FieldMarshaller<?> fm)

Method Detail

isPostFactum

public boolean isPostFactum()

Description copied from class: ValueGenerator

If true, this key generator will be run after the insert statement, if false, it will be run before.

Specified by:

isPostFactum in class ValueGenerator

init

public void init(Connection conn,
                 DatabaseLiaison liaison)
          throws SQLException

Description copied from class: ValueGenerator

Ensures the generator is prepared for operation, creating it (only) if necessary.

Specified by:

init in class ValueGenerator

Throws:

SQLException

delete

public void delete(Connection conn,
                   DatabaseLiaison liaison)
            throws SQLException

Description copied from class: ValueGenerator

Delete all database entities associated with this value generator.

Specified by:

delete in class ValueGenerator

Throws:

SQLException

nextGeneratedValue

public int nextGeneratedValue(Connection conn,
                              DatabaseLiaison liaison)
                       throws SQLException

Description copied from class: ValueGenerator

Fetch/generate the next primary key value.

Specified by:

nextGeneratedValue in class ValueGenerator

Throws:

SQLException

defStr

protected static String defStr(String value,
                               String def)

Convenience function to return a value or a default fallback.