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

Class EmbeddedClassStrategy

java.lang.Object

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

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

org.apache.openjpa.jdbc.meta.strats.EmbeddedClassStrategy

All Implemented Interfaces:

Serializable, ClassStrategy, Strategy

public class EmbeddedClassStrategy
extends AbstractClassStrategy

Class mapping for embedded objects.

Author:

Abe White

See Also:

• Serialized Form

Field Summary

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

cls

Constructor Summary

Constructors

Constructor	Description
EmbeddedClassStrategy()

Method Summary

Modifier and Type	Method	Description
Object	getNullIndicatorValue(OpenJPAStateManager sm)	Return the proper synthetic null indicator value for the given instance.
boolean	indicatesNull(Object val)	Return whether the given null indicator value means the object is null.
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.
void	map(boolean adapt)	Map the owning mapping using this strategy.

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

customLoad, customLoad, customLoad, joinSuperclass, setClassMapping, supportsEagerSelect

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 Details

EmbeddedClassStrategy

public EmbeddedClassStrategy()

Method Details

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

getNullIndicatorValue

public Object getNullIndicatorValue(OpenJPAStateManager sm)

Return the proper synthetic null indicator value for the given instance.

indicatesNull

public boolean indicatesNull(Object val)

Return whether the given null indicator value means the object is null.

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