org.eclipse.persistence.mappings

Class OneToManyMapping

java.lang.Object

org.eclipse.persistence.core.mappings.CoreMapping<AttributeAccessor,AbstractSession,ContainerPolicy,ClassDescriptor,DatabaseField>

org.eclipse.persistence.mappings.DatabaseMapping

org.eclipse.persistence.mappings.ForeignReferenceMapping

org.eclipse.persistence.mappings.CollectionMapping

org.eclipse.persistence.mappings.OneToManyMapping

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, ContainerMapping, MapComponentMapping, RelationalMapping

Direct Known Subclasses:

UnidirectionalOneToManyMapping

public class OneToManyMapping
extends CollectionMapping
implements RelationalMapping, MapComponentMapping

Purpose: This mapping is used to represent the typical RDBMS relationship between a single source object and collection of target objects; where, on the database, the target objects have references (foreign keys) to the source object.

Since:

TOPLink/Java 1.0

Author:

Sati

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.persistence.mappings.DatabaseMapping

DatabaseMapping.WriteType

Field Summary

Fields inherited from class org.eclipse.persistence.mappings.ForeignReferenceMapping

INNER_JOIN, NONE, OUTER_JOIN, QUERY_BATCH_PARAMETER

Constructor Summary

Constructors

Constructor and Description
OneToManyMapping() PUBLIC: Default constructor.

Method Summary

Modifier and Type	Method and Description
void	addTargetForeignKeyField(DatabaseField targetForeignKeyField, DatabaseField sourceKeyField) INTERNAL: Add the associated fields to the appropriate collections.
void	addTargetForeignKeyFieldName(java.lang.String targetForeignKeyFieldName, java.lang.String sourceKeyFieldName) PUBLIC: Define the target foreign key relationship in the one-to-many mapping.
Expression	buildSelectionCriteria() This method would allow customers to get the potential selection criteria for a mapping prior to initialization.
java.lang.Object	clone() INTERNAL: Clone the appropriate attributes.
void	collectQueryParameters(java.util.Set<DatabaseField> cacheFields) INTERNAL: This method is used to store the FK fields that can be cached that correspond to noncacheable mappings the FK field values will be used to re-issue the query when cloning the shared cache entity
java.lang.Object	createMapComponentFromRow(AbstractRecord dbRow, ObjectBuildingQuery query, CacheKey parentCacheKey, AbstractSession session, boolean isTargetProtected) INTERNAL Called when a DatabaseMapping is used to map the key in a collection.
java.util.Collection	getFieldsForTranslationInAggregate() INTERNAL: Return source key fields for translation by an AggregateObjectMapping
java.util.Vector	getSourceKeyFieldNames() PUBLIC: Return the source key field names associated with the mapping.
java.util.Vector<DatabaseField>	getSourceKeyFields() INTERNAL: Return the source key fields.
java.util.Map<DatabaseField,DatabaseField>	getSourceKeysToTargetForeignKeys() INTERNAL: Return the source/target key fields.
java.util.Vector	getTargetForeignKeyFieldNames() INTERNAL: Return the target foreign key field names associated with the mapping.
java.util.Vector<DatabaseField>	getTargetForeignKeyFields() INTERNAL: Return the target foreign key fields.
java.util.Map<DatabaseField,DatabaseField>	getTargetForeignKeysToSourceKeys() INTERNAL: Return the target/source key fields.
java.util.Map	getTargetForeignKeyToSourceKeys() INTERNAL: Maintain for backward compatibility.
java.util.List<DatabaseField>	getTargetPrimaryKeyFields() INTERNAL: Primary keys of targetForeignKeyTable.
boolean	hasInverseConstraintDependency() INTERNAL: Return whether the mapping has any inverse constraint dependencies, such as foreign keys and join tables.
void	initialize(AbstractSession session) INTERNAL: Initialize the mapping.
boolean	isCascadedLockingSupported() INTERNAL Return true if this mapping supports cascaded version optimistic locking.
boolean	isJoiningSupported() INTERNAL: Return if this mapping support joining.
boolean	isOneToManyMapping() INTERNAL:
boolean	isRelationalMapping() INTERNAL:
void	performDataModificationEvent(java.lang.Object[] event, AbstractSession session) INTERNAL: Perform the commit event.
void	postInitializeSourceAndTargetExpressions() INTERNAL: Post-initialize source and target expression fields created when a mapping's selectionCriteria is created early with only partly initialized fields.
void	postInsert(WriteObjectQuery query) INTERNAL: Insert the reference objects.
void	postUpdate(WriteObjectQuery query) INTERNAL: Update the reference objects.
void	preDelete(DeleteObjectQuery query) INTERNAL: Delete the reference objects.
void	prepareCascadeLockingPolicy() Prepare a cascade locking policy.
boolean	requiresDataModificationEvents() INTERNAL: Returns whether this mapping uses data modification events to complete its writes
void	setAddTargetSQLString(java.lang.String sqlString) PUBLIC:
void	setCustomAddTargetQuery(DataModifyQuery query) PUBLIC: The default add target query for mapping can be overridden by specifying the new query.
void	setCustomRemoveAllTargetsQuery(DataModifyQuery query) PUBLIC: The default remove all targets query for mapping can be overridden by specifying the new query.
void	setCustomRemoveTargetQuery(DataModifyQuery query) PUBLIC: The default remove target query for mapping can be overridden by specifying the new query.
void	setDeleteAllSQLString(java.lang.String sqlString) PUBLIC: Set the SQL string used by the mapping to delete the target objects.
void	setSessionName(java.lang.String name) PUBLIC: Set the name of the session to execute the mapping's queries under.
void	setSourceKeyFieldNames(java.util.Vector fieldNames) INTERNAL: Set the source key field names associated with the mapping.
void	setSourceKeyFields(java.util.Vector<DatabaseField> sourceKeyFields) INTERNAL: Set the source key fields.
void	setTargetForeignKeyFieldName(java.lang.String targetForeignKeyFieldName) PUBLIC: Define the target foreign key relationship in the one-to-many mapping.
void	setTargetForeignKeyFieldNames(java.lang.String[] targetForeignKeyFieldNames, java.lang.String[] sourceKeyFieldNames) PUBLIC: Define the target foreign key relationship in the one-to-many mapping.
void	setTargetForeignKeyFieldNames(java.util.Vector fieldNames) INTERNAL: Set the target key field names associated with the mapping.
void	setTargetForeignKeyFields(java.util.Vector<DatabaseField> targetForeignKeyFields) INTERNAL: Set the target fields.
void	updateTargetForeignKeyPostUpdateSource_ObjectAdded(ObjectLevelModifyQuery query, java.lang.Object objectAdded, java.util.Map extraData) INTERNAL: Update target foreign key after a target object was added to the source.
void	updateTargetForeignKeyPostUpdateSource_ObjectRemoved(ObjectLevelModifyQuery query, java.lang.Object objectRemoved) INTERNAL: Update target foreign key after a target object was removed from the source.
void	updateTargetRowPostInsertSource(WriteObjectQuery query) INTERNAL: Update target foreign keys after a new source was inserted.
void	updateTargetRowPreDeleteSource(ObjectLevelModifyQuery query) INTERNAL: Update target foreign key after a target object was removed from the source.
boolean	verifyDelete(java.lang.Object object, AbstractSession session) INTERNAL: Used to verify whether the specified object is deleted or not.

Methods inherited from class org.eclipse.persistence.mappings.CollectionMapping

addAggregateOrderBy, addAscendingOrdering, addDescendingOrdering, addOrderBy, buildBackupCloneForPartObject, buildChangeRecord, buildCloneForPartObject, buildContainerClone, buildCopy, buildElementClone, buildElementUnitOfWorkClone, buildExpression, buildReferencesPKList, calculateDeferredChanges, cascadeDiscoverAndPersistUnregisteredNewObjects, cascadePerformRemoveIfRequired, cascadePerformRemovePrivateOwnedObjectFromChangeSetIfRequired, cascadeRegisterNewIfRequired, compareCollectionsForChange, compareForChange, compareObjects, convertClassNamesToClasses, extractResultFromBatchQuery, fixRealObjectReferences, getContainerPolicy, getJoinCriteria, getListOrderField, getObjectCorrespondingTo, getOrderByQueryKeyExpressions, getOrderCorrectionType, getRealCollectionAttributeValueFromObject, hasOrderBy, isAttributeValueInstantiatedOrChanged, isChangeTrackingSupported, isCollectionMapping, isListOrderFieldSupported, isMapKeyObjectRelationship, iterateOnElement, iterateOnRealAttributeValue, load, loadAll, mergeChangesIntoObject, mergeIntoObject, mustDeleteReferenceObjectsOneByOne, postCalculateChanges, postDelete, postInitialize, preInsert, preUpdate, recordPrivateOwnedRemovals, replaceValueHoldersIn, setChangeListener, setContainerPolicy, setCustomDeleteAllQuery, setDeleteAllCall, setListOrderField, setListOrderFieldName, setMustDeleteReferenceObjectsOneByOne, setOrderCorrectionType, setUseLazyInstantiationForIndirectCollection, shouldUseLazyInstantiationForIndirectCollection, shouldUseListOrderFieldTableExpression, simpleAddToCollectionChangeRecord, simpleRemoveFromCollectionChangeRecord, updateChangeRecord, updateChangeRecordForSelfMerge, updateCollectionChangeRecord, useCollectionClass, useCollectionClassName, useListClassName, useMapClass, useMapClass, useMapClassName, useSortedSetClass, useSortedSetClassName, useSortedSetClassName, useTransparentCollection, useTransparentList, useTransparentMap, useTransparentSet, validateBeforeInitialization, valueFromPKList, writeChanges

Methods inherited from class org.eclipse.persistence.mappings.ForeignReferenceMapping

addForeignKeyField, buildBackupClone, buildClone, buildCloneFromRow, createCloneValueHolder, dontUseBatchReading, dontUseIndirection, extendPessimisticLockScopeInSourceQuery, fixObjectReferences, getAttributeValueFromObject, getAttributeValueWithClonedValueHolders, getBatchFetchType, getIndirectionPolicy, getJoinFetch, getMappedBy, getOrderByNormalizedExpressions, getPartitioningPolicy, getPartitioningPolicyName, getRealAttributeValueFromAttribute, getReferenceClass, getReferenceClassName, getReferenceDescriptor, getRelationshipPartner, getRelationshipPartnerAttributeName, getSelectionCriteria, getSelectionQuery, getValueFromRemoteValueHolder, hasCustomSelectionQuery, hasDependency, hasNestedIdentityReference, instantiateAttribute, isAttributeValueFromObjectInstantiated, isAttributeValueFullyBuilt, isAttributeValueInstantiated, isCascadeDetach, isCascadeMerge, isCascadeOnDeleteSetOnDatabase, isCascadePersist, isCascadeRefresh, isCascadeRemove, isForeignReferenceMapping, isInnerJoinFetched, isJoinFetched, isLazy, isLockableMapping, isOuterJoinFetched, isPrivateOwned, iterate, mergeRemoteValueHolder, preInitialize, prepareNestedBatchQuery, prepareNestedJoins, privateOwnedRelationship, readFromRowIntoObject, remoteInitialization, requiresTransientWeavedFields, setBatchFetchType, setCascadeAll, setCascadeDetach, setCascadeMerge, setCascadePersist, setCascadeRefresh, setCascadeRemove, setCustomSelectionQuery, setForceInitializationOfSelectionCriteria, setIndirectionPolicy, setIsCacheable, setIsCascadeOnDeleteSetOnDatabase, setIsPrivateOwned, setJoinFetch, setMappedBy, setPartitioningPolicy, setPartitioningPolicyName, setRealAttributeValueInObject, setReferenceClass, setReferenceClassName, setRelationshipPartner, setRelationshipPartnerAttributeName, setRequiresTransientWeavedFields, setSelectionCall, setSelectionCriteria, setSelectionSQLString, setShouldExtendPessimisticLockScope, setUsesBatchReading, setUsesIndirection, shouldExtendPessimisticLockScope, shouldExtendPessimisticLockScopeInDedicatedQuery, shouldExtendPessimisticLockScopeInSourceQuery, shouldExtendPessimisticLockScopeInTargetQuery, shouldMergeCascadeParts, shouldRefreshCascadeParts, shouldUseBatchReading, trimRowForJoin, trimRowForJoin, useBasicIndirection, useBatchReading, useContainerIndirection, useInnerJoinFetch, useOuterJoinFetch, usesIndirection, useWeavedIndirection, valueFromRow

Methods inherited from class org.eclipse.persistence.mappings.DatabaseMapping

addUnconvertedProperty, buildObjectJoinExpression, buildObjectJoinExpression, buildShallowOriginalFromRow, derivesId, earlyPreDelete, getAttributeAccessor, getAttributeClassification, getAttributeName, getDerivedIdMapping, getDescriptor, getField, getFieldClassification, getFields, getGetMethodName, getMapsIdValue, getProperties, getProperty, getRealAttributeValueFromObject, getSelectFields, getSelectTables, getSetMethodName, getUnconvertedProperties, getWeight, hasConstraintDependency, hasMapsIdValue, hasUnconvertedProperties, isAbstractColumnMapping, isAbstractCompositeCollectionMapping, isAbstractCompositeDirectCollectionMapping, isAbstractCompositeObjectMapping, isAbstractDirectMapping, isAggregateCollectionMapping, isAggregateMapping, isAggregateObjectMapping, isCacheable, isCandidateForPrivateOwnedRemoval, isCloningRequired, isDatabaseMapping, isDirectCollectionMapping, isDirectMapMapping, isDirectToFieldMapping, isDirectToXMLTypeMapping, isEISMapping, isElementCollectionMapping, isInAndOutSopObject, isInOnlySopObject, isInSopObject, isJPAId, isManyToManyMapping, isManyToOneMapping, isMapKeyMapping, isMultitenantPrimaryKeyMapping, isNestedTableMapping, isObjectReferenceMapping, isOneToOneMapping, isOptional, isOutOnlySopObject, isOutSopObject, isOwned, isPrimaryKeyMapping, isReadOnly, isReferenceMapping, isStructureMapping, isTransformationMapping, isUnidirectionalOneToManyMapping, isUsingMethodAccess, isVariableOneToOneMapping, isWriteOnly, isXMLMapping, postCalculateChangesOnDeleted, readFromResultSetIntoObject, readOnly, readWrite, rehashFieldDependancies, setAttributeAccessor, setAttributeName, setAttributeValueInObject, setDerivedIdMapping, setDerivesId, setDescriptor, setGetMethodName, setIsInAndOutSopObject, setIsInSopObject, setIsJPAId, setIsLazy, setIsMapKeyMapping, setIsOptional, setIsOutSopObject, setIsPrimaryKeyMapping, setIsReadOnly, setMapsIdValue, setProperties, setProperty, setSetMethodName, setWeight, toString, validateAfterInitialization, valueFromObject, valueFromResultSet, valueFromRow, writeFromAttributeIntoRow, writeFromObjectIntoRow, writeFromObjectIntoRowForShallowInsert, writeFromObjectIntoRowForShallowInsertWithChangeRecord, writeFromObjectIntoRowForUpdate, writeFromObjectIntoRowForUpdateAfterShallowInsert, writeFromObjectIntoRowForUpdateBeforeShallowDelete, writeFromObjectIntoRowForWhereClause, writeFromObjectIntoRowWithChangeRecord, writeInsertFieldsIntoRow, writeUpdateFieldsIntoRow

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

OneToManyMapping

public OneToManyMapping()

PUBLIC: Default constructor.

Method Detail

isRelationalMapping

public boolean isRelationalMapping()

INTERNAL:

Overrides:

isRelationalMapping in class DatabaseMapping

addTargetForeignKeyField

public void addTargetForeignKeyField(DatabaseField targetForeignKeyField,
                                     DatabaseField sourceKeyField)

INTERNAL: Add the associated fields to the appropriate collections.

Overrides:

addTargetForeignKeyField in class ForeignReferenceMapping

addTargetForeignKeyFieldName

public void addTargetForeignKeyFieldName(java.lang.String targetForeignKeyFieldName,
                                         java.lang.String sourceKeyFieldName)

PUBLIC: Define the target foreign key relationship in the one-to-many mapping. This method is used for composite target foreign key relationships. That is, the target object's table has multiple foreign key fields that are references to the source object's (typically primary) key fields. Both the target foreign key field name and the corresponding source primary key field name must be specified. Because the target object's table must store a foreign key to the source table, the target object must map that foreign key, this is normally done through a one-to-one mapping back-reference. Other options include:

• use a DirectToFieldMapping and maintain the foreign key fields directly in the target
• use a ManyToManyMapping
• use an AggregateCollectionMapping

See Also:

DirectToFieldMapping, ManyToManyMapping, AggregateCollectionMapping

buildSelectionCriteria

public Expression buildSelectionCriteria()

This method would allow customers to get the potential selection criteria for a mapping prior to initialization. This would allow them to more easily create an amendment method that would amend the SQL for the join. CR#3922 - This method is almost the same as buildDefaultSelectionCriteria() the difference is that TargetForeignKeysToSourceKeys contains more information after login then SourceKeyFields contains before login.

collectQueryParameters

public void collectQueryParameters(java.util.Set<DatabaseField> cacheFields)

INTERNAL: This method is used to store the FK fields that can be cached that correspond to noncacheable mappings the FK field values will be used to re-issue the query when cloning the shared cache entity

Overrides:

collectQueryParameters in class CollectionMapping

clone

public java.lang.Object clone()

INTERNAL: Clone the appropriate attributes.

Specified by:

clone in interface MapComponentMapping

Overrides:

clone in class CollectionMapping

createMapComponentFromRow

public java.lang.Object createMapComponentFromRow(AbstractRecord dbRow,
                                                  ObjectBuildingQuery query,
                                                  CacheKey parentCacheKey,
                                                  AbstractSession session,
                                                  boolean isTargetProtected)

INTERNAL Called when a DatabaseMapping is used to map the key in a collection. Returns the key.

Specified by:

createMapComponentFromRow in interface MapComponentMapping

getFieldsForTranslationInAggregate

public java.util.Collection getFieldsForTranslationInAggregate()

INTERNAL: Return source key fields for translation by an AggregateObjectMapping

Overrides:

getFieldsForTranslationInAggregate in class ForeignReferenceMapping

getSourceKeyFieldNames

public java.util.Vector getSourceKeyFieldNames()

PUBLIC: Return the source key field names associated with the mapping. These are in-order with the targetForeignKeyFieldNames.

getSourceKeyFields

public java.util.Vector<DatabaseField> getSourceKeyFields()

INTERNAL: Return the source key fields.

getSourceKeysToTargetForeignKeys

public java.util.Map<DatabaseField,DatabaseField> getSourceKeysToTargetForeignKeys()

INTERNAL: Return the source/target key fields.

getTargetPrimaryKeyFields

public java.util.List<DatabaseField> getTargetPrimaryKeyFields()

INTERNAL: Primary keys of targetForeignKeyTable.

Overrides:

getTargetPrimaryKeyFields in class CollectionMapping

getTargetForeignKeyFieldNames

public java.util.Vector getTargetForeignKeyFieldNames()

INTERNAL: Return the target foreign key field names associated with the mapping. These are in-order with the targetForeignKeyFieldNames.

getTargetForeignKeyFields

public java.util.Vector<DatabaseField> getTargetForeignKeyFields()

INTERNAL: Return the target foreign key fields.

getTargetForeignKeysToSourceKeys

public java.util.Map<DatabaseField,DatabaseField> getTargetForeignKeysToSourceKeys()

INTERNAL: Return the target/source key fields.

getTargetForeignKeyToSourceKeys

public java.util.Map getTargetForeignKeyToSourceKeys()

INTERNAL: Maintain for backward compatibility. This is 'public' so StoredProcedureGenerator does not have to use the custom query expressions.

hasInverseConstraintDependency

public boolean hasInverseConstraintDependency()

INTERNAL: Return whether the mapping has any inverse constraint dependencies, such as foreign keys and join tables.

Overrides:

hasInverseConstraintDependency in class DatabaseMapping

initialize

public void initialize(AbstractSession session)
                throws DescriptorException

INTERNAL: Initialize the mapping.

Overrides:

initialize in class CollectionMapping

Throws:

DescriptorException

isOneToManyMapping

public boolean isOneToManyMapping()

INTERNAL:

Overrides:

isOneToManyMapping in class DatabaseMapping

performDataModificationEvent

public void performDataModificationEvent(java.lang.Object[] event,
                                         AbstractSession session)
                                  throws DatabaseException,
                                         DescriptorException

INTERNAL: Perform the commit event. This is used in the uow to delay data modifications.

Overrides:

performDataModificationEvent in class DatabaseMapping

Throws:

DatabaseException

DescriptorException

postInsert

public void postInsert(WriteObjectQuery query)
                throws DatabaseException,
                       OptimisticLockException

INTERNAL: Insert the reference objects.

Overrides:

postInsert in class CollectionMapping

Throws:

DatabaseException

OptimisticLockException

postInitializeSourceAndTargetExpressions

public void postInitializeSourceAndTargetExpressions()

INTERNAL: Post-initialize source and target expression fields created when a mapping's selectionCriteria is created early with only partly initialized fields.

Overrides:

postInitializeSourceAndTargetExpressions in class DatabaseMapping

See Also:

OneToOneMapping.postInitializeSourceAndTargetExpressions(), postInitializeSourceAndTargetExpressions()

postUpdate

public void postUpdate(WriteObjectQuery query)
                throws DatabaseException,
                       OptimisticLockException

INTERNAL: Update the reference objects.

Overrides:

postUpdate in class DatabaseMapping

Throws:

DatabaseException

OptimisticLockException

preDelete

public void preDelete(DeleteObjectQuery query)
               throws DatabaseException,
                      OptimisticLockException

INTERNAL: Delete the reference objects.

Overrides:

preDelete in class DatabaseMapping

Throws:

DatabaseException

OptimisticLockException

prepareCascadeLockingPolicy

public void prepareCascadeLockingPolicy()

Prepare a cascade locking policy.

Overrides:

prepareCascadeLockingPolicy in class DatabaseMapping

requiresDataModificationEvents

public boolean requiresDataModificationEvents()

INTERNAL: Returns whether this mapping uses data modification events to complete its writes

See Also:

UnidirectionalOneToManyMapping

setCustomAddTargetQuery

public void setCustomAddTargetQuery(DataModifyQuery query)

PUBLIC: The default add target query for mapping can be overridden by specifying the new query. This query must set new value to target foreign key.

setAddTargetSQLString

public void setAddTargetSQLString(java.lang.String sqlString)

PUBLIC:

setCustomRemoveTargetQuery

public void setCustomRemoveTargetQuery(DataModifyQuery query)

PUBLIC: The default remove target query for mapping can be overridden by specifying the new query. In case target foreign key references the source, this query must set target foreign key to null.

setCustomRemoveAllTargetsQuery

public void setCustomRemoveAllTargetsQuery(DataModifyQuery query)

PUBLIC: The default remove all targets query for mapping can be overridden by specifying the new query. This query must set all target foreign keys that reference the source to null.

setDeleteAllSQLString

public void setDeleteAllSQLString(java.lang.String sqlString)

PUBLIC: Set the SQL string used by the mapping to delete the target objects. This allows the developer to override the SQL generated by TopLink with a custom SQL statement or procedure call. The arguments are translated from the fields of the source row, by replacing the field names marked by '#' with the values for those fields at execution time. A one-to-many mapping will only use this delete all optimization if the target objects can be deleted in a single SQL call. This is possible when the target objects are in a single table, do not using locking, do not contain other privately-owned parts, do not read subclasses, etc.

Example: "delete from PHONE where OWNER_ID = #EMPLOYEE_ID"

Overrides:

setDeleteAllSQLString in class CollectionMapping

setSessionName

public void setSessionName(java.lang.String name)

PUBLIC: Set the name of the session to execute the mapping's queries under. This can be used by the session broker to override the default session to be used for the target class.

Overrides:

setSessionName in class CollectionMapping

setSourceKeyFieldNames

public void setSourceKeyFieldNames(java.util.Vector fieldNames)

INTERNAL: Set the source key field names associated with the mapping. These must be in-order with the targetForeignKeyFieldNames.

setSourceKeyFields

public void setSourceKeyFields(java.util.Vector<DatabaseField> sourceKeyFields)

INTERNAL: Set the source key fields.

setTargetForeignKeyFieldName

public void setTargetForeignKeyFieldName(java.lang.String targetForeignKeyFieldName)

PUBLIC: Define the target foreign key relationship in the one-to-many mapping. This method can be used when the foreign and primary keys have only a single field each. (Use #addTargetForeignKeyFieldName(String, String) for "composite" keys.) Only the target foreign key field name is specified and the source (primary) key field is assumed to be the primary key of the source object. Because the target object's table must store a foreign key to the source table, the target object must map that foreign key, this is normally done through a one-to-one mapping back-reference. Other options include:

• use a DirectToFieldMapping and maintain the foreign key fields directly in the target
• use a ManyToManyMapping
• use an AggregateCollectionMapping

See Also:

DirectToFieldMapping, ManyToManyMapping, AggregateCollectionMapping

setTargetForeignKeyFieldNames

public void setTargetForeignKeyFieldNames(java.lang.String[] targetForeignKeyFieldNames,
                                          java.lang.String[] sourceKeyFieldNames)

PUBLIC: Define the target foreign key relationship in the one-to-many mapping. This method is used for composite target foreign key relationships. That is, the target object's table has multiple foreign key fields to the source object's (typically primary) key fields. Both the target foreign key field names and the corresponding source primary key field names must be specified.

setTargetForeignKeyFieldNames

public void setTargetForeignKeyFieldNames(java.util.Vector fieldNames)

INTERNAL: Set the target key field names associated with the mapping. These must be in-order with the sourceKeyFieldNames.

setTargetForeignKeyFields

public void setTargetForeignKeyFields(java.util.Vector<DatabaseField> targetForeignKeyFields)

INTERNAL: Set the target fields.

isCascadedLockingSupported

public boolean isCascadedLockingSupported()

INTERNAL Return true if this mapping supports cascaded version optimistic locking.

Overrides:

isCascadedLockingSupported in class DatabaseMapping

isJoiningSupported

public boolean isJoiningSupported()

INTERNAL: Return if this mapping support joining.

Overrides:

isJoiningSupported in class ForeignReferenceMapping

updateTargetRowPostInsertSource

public void updateTargetRowPostInsertSource(WriteObjectQuery query)
                                     throws DatabaseException

INTERNAL: Update target foreign keys after a new source was inserted. This follows following steps.

Throws:

DatabaseException

updateTargetForeignKeyPostUpdateSource_ObjectAdded

public void updateTargetForeignKeyPostUpdateSource_ObjectAdded(ObjectLevelModifyQuery query,
                                                               java.lang.Object objectAdded,
                                                               java.util.Map extraData)
                                                        throws DatabaseException

INTERNAL: Update target foreign key after a target object was added to the source. This follows following steps.

- Extract primary key and its value from the source object.

- Extract target key and its value from the target object.

- Construct an update statement with above fields and values for target table.

- execute the statement.

Throws:

DatabaseException

updateTargetForeignKeyPostUpdateSource_ObjectRemoved

public void updateTargetForeignKeyPostUpdateSource_ObjectRemoved(ObjectLevelModifyQuery query,
                                                                 java.lang.Object objectRemoved)
                                                          throws DatabaseException

INTERNAL: Update target foreign key after a target object was removed from the source. This follows following steps.

- Extract primary key and its value from the source object.

- Extract target key and its value from the target object.

- Construct an update statement with above fields and values for target table.

- execute the statement.

Throws:

DatabaseException

updateTargetRowPreDeleteSource

public void updateTargetRowPreDeleteSource(ObjectLevelModifyQuery query)
                                    throws DatabaseException

INTERNAL: Update target foreign key after a target object was removed from the source. This follows following steps.

- Extract primary key and its value from the source object.

- Extract target key and its value from the target object.

- Construct an update statement with above fields and values for target table.

- execute the statement.

Throws:

DatabaseException

verifyDelete

public boolean verifyDelete(java.lang.Object object,
                            AbstractSession session)
                     throws DatabaseException

INTERNAL: Used to verify whether the specified object is deleted or not.

Overrides:

verifyDelete in class CollectionMapping

Throws:

DatabaseException