Package org.apache.openjpa.jdbc.meta.strats

Class VerticalClassStrategy

java.lang.Object

org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

org.apache.openjpa.jdbc.meta.strats.AbstractClassStrategy

org.apache.openjpa.jdbc.meta.strats.VerticalClassStrategy

All Implemented Interfaces:

Serializable, ClassStrategy, Strategy

public class VerticalClassStrategy
extends AbstractClassStrategy

Mapping for subclasses that join to their superclass table.

Author:

Abe White

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ALIAS

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

cls

Constructor Summary

Constructors

Constructor	Description
VerticalClassStrategy()

Method Summary

Modifier and Type	Method	Description
void	delete(OpenJPAStateManager sm, JDBCStore store, RowManager rm)	Set the where values appropriately to delete the proper instance, and set all relations on non-secondary tables as updates.
String	getAlias()	Return the alias of this strategy.
void	initialize()	Perform caching and other initialization operations.
void	insert(OpenJPAStateManager sm, JDBCStore store, RowManager rm)	Set values for the mapping into the proper rows.
boolean	isPrimaryKeyObjectId(boolean hasAll)	Return true if the this class' primary key columns correspond to the base class' primary key columns used to construct oid values.
Joins	joinSuperclass(Joins joins, boolean toThis)	Join the mapping and its superclass.
void	map(boolean adapt)	Map the owning mapping using this strategy.
boolean	supportsEagerSelect(Select sel, OpenJPAStateManager sm, JDBCStore store, ClassMapping base, JDBCFetchConfiguration fetch)	Return true if this strategy can perform the given select from the given base mapping.
void	update(OpenJPAStateManager sm, JDBCStore store, RowManager rm)	Set values for the mapping into the proper rows.

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

customLoad, customLoad, customLoad, setClassMapping

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

customDelete, customInsert, customUpdate, isCustomDelete, isCustomInsert, isCustomUpdate

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, isCustomDelete, isCustomInsert, isCustomUpdate

Field Details

ALIAS

public static final String ALIAS

See Also:

• Constant Field Values

Constructor Details

VerticalClassStrategy

public VerticalClassStrategy()

Method Details

getAlias

public String getAlias()

Description copied from interface: Strategy

Return the alias of this strategy. For custom strategies, return the full class name.

Specified by:

getAlias in interface Strategy

Overrides:

getAlias in class AbstractStrategy

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

initialize

public void initialize()

Description copied from interface: Strategy

Perform caching and other initialization operations. This method is called after Strategy.map(boolean), and after all related components have been mapped as well.

Specified by:

initialize in interface Strategy

Overrides:

initialize in class AbstractStrategy

insert

public void insert(OpenJPAStateManager sm,
 JDBCStore store,
 RowManager rm)
            throws SQLException

Description copied from interface: Strategy

Set values for the mapping into the proper rows. For class mappings, this method will be called only after the corresponding method has been called for all fields of this mapping.

Specified by:

insert in interface Strategy

Overrides:

insert in class AbstractStrategy

Throws:

SQLException

update

public void update(OpenJPAStateManager sm,
 JDBCStore store,
 RowManager rm)
            throws SQLException

Description copied from interface: Strategy

Set values for the mapping into the proper rows.

Specified by:

update in interface Strategy

Overrides:

update in class AbstractStrategy

Throws:

SQLException

See Also:

• Strategy.insert(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.sql.RowManager)

delete

public void delete(OpenJPAStateManager sm,
 JDBCStore store,
 RowManager rm)
            throws SQLException

Description copied from interface: Strategy

Set the where values appropriately to delete the proper instance, and set all relations on non-secondary tables as updates. This allows foreign key analysis.

Specified by:

delete in interface Strategy

Overrides:

delete in class AbstractStrategy

Throws:

SQLException

See Also:

• Strategy.insert(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.sql.RowManager)

isPrimaryKeyObjectId

public boolean isPrimaryKeyObjectId(boolean hasAll)

Description copied from interface: ClassStrategy

Return true if the this class' primary key columns correspond to the base class' primary key columns used to construct oid values. Base classes always return true. Classes that join to the base class table, though, may not always join using the same columns the base class uses for oid values, or may not use all the columns. When performing a select, we will join down to the most-derived class that is identified by oid values. We cannot use non-primary key field values for joining during selects, because the field values to join on might be the ones we're trying to select! Similarly, we can only reconstruct oid values for selected objects using classes whose primary keys store oid values.

Specified by:

isPrimaryKeyObjectId in interface ClassStrategy

Overrides:

isPrimaryKeyObjectId in class AbstractClassStrategy

Parameters:

hasAll - if true, there must be a primary key column for every base class primary key column; if false the primary key must only match a subset of the base class primary key columns

joinSuperclass

public Joins joinSuperclass(Joins joins,
 boolean toThis)

Description copied from interface: ClassStrategy

Join the mapping and its superclass.

Specified by:

joinSuperclass in interface ClassStrategy

Overrides:

joinSuperclass in class AbstractClassStrategy

toThis - if false, inner join to the superclass table; if true, outer join from the superclass table to this table

supportsEagerSelect

public boolean supportsEagerSelect(Select sel,
 OpenJPAStateManager sm,
 JDBCStore store,
 ClassMapping base,
 JDBCFetchConfiguration fetch)

Description copied from interface: ClassStrategy

Return true if this strategy can perform the given select from the given base mapping. The given state manager may be null if selecting multiple instances.

Specified by:

supportsEagerSelect in interface ClassStrategy

Overrides:

supportsEagerSelect in class AbstractClassStrategy