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

Class RelationRelationMapTableFieldStrategy

java.lang.Object

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

org.apache.openjpa.jdbc.meta.strats.AbstractFieldStrategy

org.apache.openjpa.jdbc.meta.strats.ContainerFieldStrategy

org.apache.openjpa.jdbc.meta.strats.MapTableFieldStrategy

org.apache.openjpa.jdbc.meta.strats.RelationRelationMapTableFieldStrategy

All Implemented Interfaces:

Serializable, FieldStrategy, Strategy, LRSMapFieldStrategy

public class RelationRelationMapTableFieldStrategy
extends MapTableFieldStrategy

Mapping for a map whose keys and values are both relations to other persistent objects.

Since:

0.4.0, 1.1.0

Author:

Abe White

See Also:

• Serialized Form

Field Summary

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

field

Constructor Summary

Constructors

Constructor	Description
RelationRelationMapTableFieldStrategy()

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.
Column[]	getKeyColumns(ClassMapping cls)	Return the columns holding data for a map key for the given key mapping from LRSMapFieldStrategy.getIndependentKeyMappings(boolean) or LRSMapFieldStrategy.getIndependentValueMappings(boolean) (or null).
Result[]	getResults(OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode, Joins[] resJoins, boolean lrs)	Return results containing all keys and values for this map.
Column[]	getValueColumns(ClassMapping cls)	Return the columns holding data for a map value for the given value mapping from LRSMapFieldStrategy.getIndependentKeyMappings(boolean) or LRSMapFieldStrategy.getIndependentValueMappings(boolean) (or null).
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.
Joins	joinKeyRelation(Joins joins, boolean forceOuter, boolean traverse)	Join this value's table to the table for the related first class object key type, if any.
Joins	joinKeyRelation(Joins joins, ClassMapping key)	Invokes FieldStrategy.joinKeyRelation(org.apache.openjpa.jdbc.sql.Joins, boolean, boolean) by default.
Joins	joinRelation(Joins joins, boolean forceOuter, boolean traverse)	Join this value's table to the table for the related first class object type, if any.
Joins	joinValueRelation(Joins joins, ClassMapping val)	Invokes FieldStrategy.joinRelation(org.apache.openjpa.jdbc.sql.Joins, boolean, boolean) by default.
Object	loadKey(OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Result res, Joins joins)	Load a key from the given result.
Object	loadValue(OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Result res, Joins joins)	Load a value from the given result.
void	map(boolean adapt)	Map the owning mapping using this strategy.
void	selectKey(Select sel, ClassMapping key, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Joins joins)	Implement this method to select the keys of this field.
void	selectValue(Select sel, ClassMapping val, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Joins joins)	Implement this method to select the values of this field.
Object	toDataStoreValue(Object val, JDBCStore store)	Translate the given external field value to its datastore equivalent.
Object	toKeyDataStoreValue(Object val, JDBCStore store)	Translate the given key value to its datastore equivalent.
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.MapTableFieldStrategy

deriveKey, deriveValue, getFieldMapping, getIndependentElementMappings, getIndependentKeyMappings, getIndependentValueMappings, getJoinForeignKey, getJoinForeignKey, handleMappedByForeignKey, isTypeUnjoinedSubclass, join, joinKey, load, loadKeyProjection, loadProjection, populateKey, supportsSelect

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

appendIndex, appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendJoinCount, appendSize, appendUnaliasedJoin

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

appendType, assertNotMappedBy, isEagerSelectToMany, isVersionable, load, loadEagerJoin, loadEagerParallel, select, selectEagerJoin, selectEagerParallel, setFieldMapping, where

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

customDelete, customInsert, customUpdate, getAlias, 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.FieldStrategy

appendIndex, appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, appendType, isEagerSelectToMany, isVersionable, load, loadEagerJoin, loadEagerParallel, select, selectEagerJoin, selectEagerParallel, setFieldMapping, where

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

customDelete, customInsert, customUpdate, getAlias, isCustomDelete, isCustomInsert, isCustomUpdate

Constructor Details

RelationRelationMapTableFieldStrategy

public RelationRelationMapTableFieldStrategy()

Method Details

getKeyColumns

public Column[] getKeyColumns(ClassMapping cls)

Description copied from interface: LRSMapFieldStrategy

Return the columns holding data for a map key for the given key mapping from LRSMapFieldStrategy.getIndependentKeyMappings(boolean) or LRSMapFieldStrategy.getIndependentValueMappings(boolean) (or null).

getValueColumns

public Column[] getValueColumns(ClassMapping cls)

Description copied from interface: LRSMapFieldStrategy

Return the columns holding data for a map value for the given value mapping from LRSMapFieldStrategy.getIndependentKeyMappings(boolean) or LRSMapFieldStrategy.getIndependentValueMappings(boolean) (or null).

selectKey

public void selectKey(Select sel,
 ClassMapping key,
 OpenJPAStateManager sm,
 JDBCStore store,
 JDBCFetchConfiguration fetch,
 Joins joins)

Description copied from interface: LRSMapFieldStrategy

Implement this method to select the keys of this field. Elements of the result will be loaded with LRSMapFieldStrategy.loadKey(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration, org.apache.openjpa.jdbc.sql.Result, org.apache.openjpa.jdbc.sql.Joins). This method is only used if the key is not derived from the value.

selectValue

public void selectValue(Select sel,
 ClassMapping val,
 OpenJPAStateManager sm,
 JDBCStore store,
 JDBCFetchConfiguration fetch,
 Joins joins)

Description copied from interface: LRSMapFieldStrategy

Implement this method to select the values of this field. Elements of the result will be loaded with LRSMapFieldStrategy.loadValue(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration, org.apache.openjpa.jdbc.sql.Result, org.apache.openjpa.jdbc.sql.Joins).

getResults

public Result[] getResults(OpenJPAStateManager sm,
 JDBCStore store,
 JDBCFetchConfiguration fetch,
 int eagerMode,
 Joins[] resJoins,
 boolean lrs)
                    throws SQLException

Description copied from interface: LRSMapFieldStrategy

Return results containing all keys and values for this map. If only one result is needed, set both array indexes to the same result instance. Also fill in the key and value joins in the given array. The results will be loaded with the LRSMapFieldStrategy.loadKey(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration, org.apache.openjpa.jdbc.sql.Result, org.apache.openjpa.jdbc.sql.Joins) or LRSMapFieldStrategy.deriveKey(org.apache.openjpa.jdbc.kernel.JDBCStore, java.lang.Object) and LRSMapFieldStrategy.loadValue(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration, org.apache.openjpa.jdbc.sql.Result, org.apache.openjpa.jdbc.sql.Joins) methods.

Throws:

SQLException

loadKey

public Object loadKey(OpenJPAStateManager sm,
 JDBCStore store,
 JDBCFetchConfiguration fetch,
 Result res,
 Joins joins)
               throws SQLException

Description copied from interface: LRSMapFieldStrategy

Load a key from the given result. This method is only used if the key is not derived from the value.

Throws:

SQLException

loadValue

public Object loadValue(OpenJPAStateManager sm,
 JDBCStore store,
 JDBCFetchConfiguration fetch,
 Result res,
 Joins joins)
                 throws SQLException

Description copied from interface: LRSMapFieldStrategy

Load a value from the given result.

Throws:

SQLException

joinKeyRelation

public Joins joinKeyRelation(Joins joins,
 ClassMapping key)

Description copied from class: MapTableFieldStrategy

Invokes FieldStrategy.joinKeyRelation(org.apache.openjpa.jdbc.sql.Joins, boolean, boolean) by default.

Specified by:

joinKeyRelation in interface LRSMapFieldStrategy

Overrides:

joinKeyRelation in class MapTableFieldStrategy

joinValueRelation

public Joins joinValueRelation(Joins joins,
 ClassMapping val)

Description copied from class: MapTableFieldStrategy

Invokes FieldStrategy.joinRelation(org.apache.openjpa.jdbc.sql.Joins, boolean, boolean) by default.

Specified by:

joinValueRelation in interface LRSMapFieldStrategy

Overrides:

joinValueRelation in class MapTableFieldStrategy

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 MapTableFieldStrategy

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)

joinRelation

public Joins joinRelation(Joins joins,
 boolean forceOuter,
 boolean traverse)

Description copied from interface: FieldStrategy

Join this value's table to the table for the related first class object type, if any. Does nothing by default.

Specified by:

joinRelation in interface FieldStrategy

Overrides:

joinRelation in class AbstractFieldStrategy

traverse - if true, throw proper exception if it is not possible for this mapping to traverse into the related type

joinKeyRelation

public Joins joinKeyRelation(Joins joins,
 boolean forceOuter,
 boolean traverse)

Description copied from interface: FieldStrategy

Join this value's table to the table for the related first class object key type, if any. Does nothing by default.

Specified by:

joinKeyRelation in interface FieldStrategy

Overrides:

joinKeyRelation in class AbstractFieldStrategy

traverse - if true, throw proper exception if it is not possible for this mapping to traverse into the related type

toDataStoreValue

public Object toDataStoreValue(Object val,
 JDBCStore store)

Description copied from interface: FieldStrategy

Translate the given external field value to its datastore equivalent. If the mapping occupies multiple columns in the datastore, return an object array, else return a single object. Simply returns the given object by default.

Specified by:

toDataStoreValue in interface FieldStrategy

Overrides:

toDataStoreValue in class AbstractFieldStrategy

toKeyDataStoreValue

public Object toKeyDataStoreValue(Object val,
 JDBCStore store)

Description copied from interface: FieldStrategy

Translate the given key value to its datastore equivalent. If the mapping occupies multiple columns in the datastore, return an object array, else return a single object. Simply returns the given object by default.

Specified by:

toKeyDataStoreValue in interface FieldStrategy

Overrides:

toKeyDataStoreValue in class AbstractFieldStrategy

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 MapTableFieldStrategy

Throws:

SQLException

See Also:

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