org.apache.openjpa.jdbc.meta.strats
Class SuperclassDiscriminatorStrategy

java.lang.Object
  org.apache.openjpa.jdbc.meta.strats.AbstractStrategy
      org.apache.openjpa.jdbc.meta.strats.AbstractDiscriminatorStrategy
          org.apache.openjpa.jdbc.meta.strats.SuperclassDiscriminatorStrategy

All Implemented Interfaces:

Serializable, DiscriminatorStrategy, Strategy

public class SuperclassDiscriminatorStrategy
extends AbstractDiscriminatorStrategy

Discriminator strategy that delegates to superclass discriminator.

Author:

Abe White

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractDiscriminatorStrategy

disc, isFinal

Constructor Summary

SuperclassDiscriminatorStrategy()

Method Summary

Class	getClass(JDBCStore store, ClassMapping base, Result res) Return the class for the current result row.
SQLBuffer	getClassConditions(Select sel, Joins joins, ClassMapping base, boolean subclasses) Return SQL to limit the classes selected as much as possible to the given base class, and optionally its subclasses.
boolean	hasClassConditions(ClassMapping base, boolean subclasses) Whether any class conditions are necessary.
void	loadSubclasses(JDBCStore store) By default, logs a warning that this discriminator cannot calculate its list of subclasses on its own.
void	map(boolean adapt) Map the owning mapping using this strategy.

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractDiscriminatorStrategy

select, setDiscriminator

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

customDelete, customInsert, customUpdate, delete, getAlias, initialize, insert, isCustomDelete, isCustomInsert, isCustomUpdate, update

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.openjpa.jdbc.meta.Strategy

customDelete, customInsert, customUpdate, delete, getAlias, initialize, insert, isCustomDelete, isCustomInsert, isCustomUpdate, update

Constructor Detail

SuperclassDiscriminatorStrategy

public SuperclassDiscriminatorStrategy()

Method Detail

map

public void map(boolean adapt)

Description copied from interface: Strategy

Map the owning mapping using this strategy.

Specified by:

map in interface Strategy

Overrides:

map in class AbstractStrategy

Parameters:

adapt - if true, use the owning mapping's raw mapping info to set its ORM data; if false, ORM data will already be set

loadSubclasses

public void loadSubclasses(JDBCStore store)
                    throws SQLException,
                           ClassNotFoundException

Description copied from class: AbstractDiscriminatorStrategy

By default, logs a warning that this discriminator cannot calculate its list of subclasses on its own.

Specified by:

loadSubclasses in interface DiscriminatorStrategy

Overrides:

loadSubclasses in class AbstractDiscriminatorStrategy

Throws:

SQLException

ClassNotFoundException

getClass

public Class getClass(JDBCStore store,
                      ClassMapping base,
                      Result res)
               throws SQLException,
                      ClassNotFoundException

Description copied from interface: DiscriminatorStrategy

Return the class for the current result row.

Specified by:

getClass in interface DiscriminatorStrategy

Overrides:

getClass in class AbstractDiscriminatorStrategy

Throws:

SQLException

ClassNotFoundException

hasClassConditions

public boolean hasClassConditions(ClassMapping base,
                                  boolean subclasses)

Description copied from interface: DiscriminatorStrategy

Whether any class conditions are necessary.

Specified by:

hasClassConditions in interface DiscriminatorStrategy

Overrides:

hasClassConditions in class AbstractDiscriminatorStrategy

See Also:

DiscriminatorStrategy.getClassConditions(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.sql.Joins, org.apache.openjpa.jdbc.meta.ClassMapping, boolean)

getClassConditions

public SQLBuffer getClassConditions(Select sel,
                                    Joins joins,
                                    ClassMapping base,
                                    boolean subclasses)

Description copied from interface: DiscriminatorStrategy

Return SQL to limit the classes selected as much as possible to the given base class, and optionally its subclasses. The select and joins instances are supplied in order to get column aliases.

Specified by:

getClassConditions in interface DiscriminatorStrategy

Overrides:

getClassConditions in class AbstractDiscriminatorStrategy