org.eclipse.persistence.mappings
Class OneToOneMapping

java.lang.Object
  org.eclipse.persistence.mappings.DatabaseMapping
      org.eclipse.persistence.mappings.ForeignReferenceMapping
          org.eclipse.persistence.mappings.ObjectReferenceMapping
              org.eclipse.persistence.mappings.OneToOneMapping

All Implemented Interfaces:

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

public class OneToOneMapping
extends ObjectReferenceMapping
implements RelationalMapping, MapKeyMapping

Purpose: One to one mappings are used to represent a pointer references between two java objects. This mappings is usually represented by a single pointer (stored in an instance variable) between the source and target objects. In the relational database tables, these mappings are normally implemented using foreign keys.

See Also:

Serialized Form

Author:

Sati

Since:

TOPLink/Java 1.0

Field Summary

org.eclipse.persistence.internal.helper.DatabaseTable	keyTableForMapKey
protected RelationTableMechanism	mechanism Mechanism holds relationTable and all fields and queries associated with it.
protected Expression	privateOwnedCriteria
protected static java.lang.String	setObject
protected boolean	shouldVerifyDelete These are used for non-unit of work modification to check if the value of the 1-1 was changed and a deletion is required.
protected java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField>	sourceToTargetKeyFields Maps the source foreign/primary key fields to the target primary/foreign key fields.
protected java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField>	targetToSourceKeyFields Maps the target primary/foreign key fields to the source foreign/primary key fields.

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

foreignKeyFields, isForeignKeyRelationship

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

cascadeMerge, cascadePersist, cascadeRefresh, cascadeRemove, forceInitializationOfSelectionCriteria, hasCustomSelectionQuery, indirectionPolicy, INNER_JOIN, isPrivateOwned, joinFetch, NONE, OUTER_JOIN, referenceClass, referenceClassName, referenceDescriptor, relationshipPartner, relationshipPartnerAttributeName, requiresTransientWeavedFields, selectionQuery, tempInitSession, usesBatchReading

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

attributeAccessor, attributeName, descriptor, fields, isDerivedIdMapping, isLazy, isMapKeyMapping, isOptional, isPrimaryKeyMapping, isReadOnly, isRemotelyInitialized, mappedByIdValue, NO_FIELDS, NO_WEIGHT, properties, weight, WEIGHT_1

Constructor Summary

OneToOneMapping()
PUBLIC: Default constructor.

Method Summary

void	addAdditionalFieldsToQuery(ReadQuery selectionQuery, Expression baseExpression) INTERNAL: Used when initializing queries for mappings that use a Map Called when the selection query is being initialized to add the fields for the map key to the query
void	addFieldsForMapKey(org.eclipse.persistence.internal.sessions.AbstractRecord joinRow) INTERNAL: Used when initializing queries for mappings that use a Map Called when the insert query is being initialized to ensure the fields for the map key are in the insert query
void	addForeignKeyField(org.eclipse.persistence.internal.helper.DatabaseField sourceForeignKeyField, org.eclipse.persistence.internal.helper.DatabaseField targetPrimaryKeyField) PUBLIC: Define the foreign key relationship in the 1-1 mapping.
void	addForeignKeyFieldName(java.lang.String sourceForeignKeyFieldName, java.lang.String targetPrimaryKeyFieldName) PUBLIC: Define the foreign key relationship in the 1-1 mapping.
void	addKeyToDeletedObjectsList(java.lang.Object object, java.util.Map deletedObjects) INTERNAL: For mappings used as MapKeys in MappedKeyContainerPolicy.
void	addTargetForeignKeyField(org.eclipse.persistence.internal.helper.DatabaseField targetForeignKeyField, org.eclipse.persistence.internal.helper.DatabaseField sourcePrimaryKeyField) PUBLIC: Define the target foreign key relationship in the 1-1 mapping.
void	addTargetForeignKeyFieldName(java.lang.String targetForeignKeyFieldName, java.lang.String sourcePrimaryKeyFieldName) PUBLIC: Define the target foreign key relationship in the 1-1 mapping.
java.lang.Object	buildElementClone(java.lang.Object attributeValue, java.lang.Object parent, org.eclipse.persistence.internal.sessions.UnitOfWorkImpl unitOfWork, boolean isExisting) Build a clone of the given element in a unitOfWork
Expression	buildObjectJoinExpression(Expression expression, Expression argument, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Used to allow object level comparisons.
Expression	buildObjectJoinExpression(Expression expression, java.lang.Object value, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Used to allow object level comparisons.
Expression	buildSelectionCriteria() This method would allow customers to get the potential selection criteria for a mapping prior to initialization.
Expression	buildSelectionCriteria(boolean useParameter, boolean usePreviousSelectionCriteria) INTERNAL: Build the selection criteria for this mapping.
ReadQuery	buildSelectionQueryForDirectCollectionKeyMapping(org.eclipse.persistence.internal.queries.ContainerPolicy containerPolicy) INTERNAL: Certain key mappings favor different types of selection query.
void	buildShallowOriginalFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow, java.lang.Object original, org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager, ObjectBuildingQuery query, org.eclipse.persistence.internal.sessions.AbstractSession executionSession) INTERNAL: Builds a shallow original object.
java.lang.Object	clone() INTERNAL: This methods clones all the fields and ensures that each collection refers to the same clones.
protected java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField>	collectFields() INTERNAL: Return all the fields populated by this mapping, these are foreign keys only.
java.lang.Object	createMapComponentFromJoinedRow(org.eclipse.persistence.internal.sessions.AbstractRecord dbRow, org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager, ObjectBuildingQuery query, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL Called when a DatabaseMapping is used to map the key in a collection.
java.lang.Object	createMapComponentFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord dbRow, ObjectBuildingQuery query, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL Called when a DatabaseMapping is used to map the key in a collection.
QueryKey	createQueryKeyForMapKey() INTERNAL: Create a query key that links to the map key
void	deleteMapKey(java.lang.Object objectDeleted, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: For mappings used as MapKeys in MappedKeyContainerPolicy, Delete the passed object if necessary.
void	extendPessimisticLockScopeInSourceQuery(ObjectLevelReadQuery sourceQuery) INTERNAL: Called only if both shouldExtendPessimisticLockScope and shouldExtendPessimisticLockScopeInSourceQuery are true.
protected void	extendPessimisticLockScopeInTargetQuery(ObjectLevelReadQuery targetQuery, ObjectBuildingQuery sourceQuery) INTERNAL: Adds locking clause to the target query to extend pessimistic lock scope.
protected java.util.Vector	extractForeignKeyFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord row, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Extract the foreign key value from the source row.
java.util.Map	extractIdentityFieldsForQuery(java.lang.Object object, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Extract the fields for the Map key from the object to use in a query
protected java.util.Vector	extractKeyFromReferenceObject(java.lang.Object object, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Extract the key value from the reference object.
java.util.Vector	extractPrimaryKeysForReferenceObjectFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord row) INTERNAL: Return the primary key for the reference object (i.e. the object object referenced by domainObject and specified by mapping).
java.lang.Object	extractResultFromBatchQuery(DatabaseQuery query, org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow, org.eclipse.persistence.internal.sessions.AbstractSession session, org.eclipse.persistence.internal.sessions.AbstractRecord argumentRow) INTERNAL: Extract the value from the batch optimized query.
Expression	getAdditionalSelectionCriteriaForMapKey() INTERNAL: Return the selection criteria necessary to select the target object when this mapping is a map key.
java.util.List<org.eclipse.persistence.internal.helper.DatabaseTable>	getAdditionalTablesForJoinQuery() INTERNAL: Return any tables that will be required when this mapping is used as part of a join query
java.util.List<org.eclipse.persistence.internal.helper.DatabaseField>	getAllFieldsForMapKey() INTERNAL: Get all the fields for the map key
protected ReadQuery	getExtendPessimisticLockScopeDedicatedQuery(org.eclipse.persistence.internal.sessions.AbstractSession session, short lockMode) INTERNAL: Should be overridden by subclass that allows setting extendPessimisticLockScope to DEDICATED_QUERY.
java.lang.Class	getFieldClassification(org.eclipse.persistence.internal.helper.DatabaseField fieldToClassify) INTERNAL: Return the classification for the field contained in the mapping.
java.util.Vector	getForeignKeyFieldNames() PUBLIC: Return the foreign key field names associated with the mapping.
java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField>	getForeignKeyFieldsForMapKey() INTERNAL: Return a Map of any foreign keys defined within the the MapKey
protected java.util.Map	getForeignKeysToPrimaryKeys() Return the appropriate hashtable that maps the "foreign keys" to the "primary keys".
java.util.List<org.eclipse.persistence.internal.helper.DatabaseField>	getIdentityFieldsForMapKey() INTERNAL: Return the fields that make up the identity of the mapped object.
java.lang.Class	getMapKeyTargetType() INTERNAL: Return the class this key mapping maps or the descriptor for it
ObjectLevelReadQuery	getNestedJoinQuery(org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager, ObjectLevelReadQuery query, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Return the query that is used when this mapping is part of a joined relationship This method is used when this mapping is used to map the key in a Map
java.util.Vector	getOrderedForeignKeyFields() INTERNAL: Return a vector of the foreign key fields in the same order as the corresponding primary key fields are in their descriptor.
protected ClassDescriptor	getPrimaryKeyDescriptor() Return the descriptor for whichever side of the relation has the "primary key".
Expression	getPrivateOwnedCriteria() INTERNAL: The private owned criteria is only used outside of the unit of work to compare the previous value of the reference.
org.eclipse.persistence.internal.helper.DatabaseTable	getRelationTable() PUBLIC: Return RelationTable.
RelationTableMechanism	getRelationTableMechanism() PUBLIC: Returns RelationTableMechanism that may be owned by the mapping, that allows to configure the mapping to use relation table (just like ManyToManyMapping).
java.util.Vector	getSourceToTargetKeyFieldAssociations() INTERNAL: Return a collection of the source to target field value associations.
java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField>	getSourceToTargetKeyFields() INTERNAL: Returns the source keys to target keys fields association.
java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField>	getTargetToSourceKeyFields() INTERNAL: Returns the target keys to source keys fields association.
java.lang.Object	getTargetVersionOfSourceObject(java.lang.Object object, java.lang.Object parent, org.eclipse.persistence.internal.sessions.MergeManager mergeManager) INTERNAL: If required, get the targetVersion of the source object from the merge manager Used with MapKeyContainerPolicy to abstract getting the target version of a source key
boolean	hasRelationTable() PUBLIC: Indicates whether the mapping has RelationTable.
boolean	hasRelationTableMechanism() PUBLIC: Indicates whether the mapping has RelationTableMechanism.
void	initialize(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Initialize the mapping.
protected void	initializeForeignKeys(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: The foreign keys primary keys are stored as database fields in the map.
protected void	initializeForeignKeysWithDefaults(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: The foreign keys primary keys are stored as database fields in the map.
protected void	initializePrivateOwnedCriteria() INTERNAL: Selection criteria is created with source foreign keys and target keys.
boolean	isCascadedLockingSupported() INTERNAL Return true if this mapping supports cascaded version optimistic locking.
boolean	isJoiningSupported() INTERNAL: Return if this mapping support joining.
boolean	isOneToOneMapping() INTERNAL:
boolean	isRelationalMapping() INTERNAL:
void	iterateOnMapKey(org.eclipse.persistence.internal.descriptors.DescriptorIterator iterator, java.lang.Object element) INTERNAL: Called when iterating through descriptors to handle iteration on this mapping when it is used as a MapKey
void	performDataModificationEvent(java.lang.Object[] event, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Perform the commit event.
void	postInitializeMapValueSelectionQuery(ReadQuery selectionQuery, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Allow the selectionQuery to be modified when this MapComponentMapping is used as the value in a Map
void	postInsert(WriteObjectQuery query) INTERNAL: Insert into relation table.
protected void	postPrepareNestedBatchQuery(ReadQuery batchQuery, ReadAllQuery query) INTERNAL: Allow the mapping the do any further batch preparation.
void	postUpdate(WriteObjectQuery query) INTERNAL: Update the relation table with the entries related to this mapping.
void	preDelete(DeleteObjectQuery query) INTERNAL: Delete privately owned parts
void	preinitializeMapKey(org.eclipse.persistence.internal.helper.DatabaseTable table) INTERNAL: Making any mapping changes necessary to use a the mapping as a map key prior to initializing the mapping
void	prepareCascadeLockingPolicy() INTERNAL: Prepare a cascade locking policy.
protected java.lang.Object	readPrivateOwnedForObject(ObjectLevelModifyQuery modifyQuery) INTERNAL: Reads the private owned object.
void	rehashFieldDependancies(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Rehash any map based on fields.
void	setForeignKeyFieldName(java.lang.String sourceForeignKeyFieldName) PUBLIC: Define the foreign key relationship in the 1-1 mapping.
void	setForeignKeyFieldNames(java.util.Vector fieldNames) PUBLIC: Return the foreign key field names associated with the mapping.
protected void	setPrivateOwnedCriteria(Expression expression) INTERNAL: Private owned criteria is used to verify the deletion of the target.
void	setRelationTableMechanism(RelationTableMechanism mechanism) PUBLIC: Set RelationTableMechanism into the mapping, that allows to configure the mapping to use relation table (just like ManyToManyMapping).
void	setShouldVerifyDelete(boolean shouldVerifyDelete) PUBLIC: Verify delete is used during delete and update on private 1:1's outside of a unit of work only.
void	setSourceToTargetKeyFieldAssociations(java.util.Vector sourceToTargetKeyFieldAssociations) INTERNAL: Set a collection of the source to target field associations.
void	setSourceToTargetKeyFields(java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField> sourceToTargetKeyFields) INTERNAL: Set the source keys to target keys fields association.
void	setTargetForeignKeyFieldName(java.lang.String targetForeignKeyFieldName) PUBLIC: Define the target foreign key relationship in the 1-1 mapping.
void	setTargetToSourceKeyFields(java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField> targetToSourceKeyFields) INTERNAL: Set the target keys to source keys fields association.
boolean	shouldVerifyDelete() PUBLIC: Verify delete is used during delete and update outside of a unit of work only.
java.lang.Object	unwrapKey(java.lang.Object key, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Allow the key mapping to unwrap the object
java.lang.Object	valueFromObject(java.lang.Object object, org.eclipse.persistence.internal.helper.DatabaseField field, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Get a value from the object and set that in the respective field of the row.
protected java.lang.Object	valueFromRowInternal(org.eclipse.persistence.internal.sessions.AbstractRecord row, org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager, ObjectBuildingQuery sourceQuery, org.eclipse.persistence.internal.sessions.AbstractSession executionSession) INTERNAL: Return the value of the field from the row or a value holder on the query to obtain the object.
protected java.lang.Object	valueFromRowInternalWithJoin(org.eclipse.persistence.internal.sessions.AbstractRecord row, org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager, ObjectBuildingQuery sourceQuery, org.eclipse.persistence.internal.sessions.AbstractSession executionSession) INTERNAL: Return the value of the field from the row or a value holder on the query to obtain the object.
java.lang.Object	wrapKey(java.lang.Object key, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Allow the key mapping to wrap the object
void	writeFromAttributeIntoRow(java.lang.Object attribute, org.eclipse.persistence.internal.sessions.AbstractRecord row, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: A subclass should implement this method if it wants different behavior.
void	writeFromObjectIntoRow(java.lang.Object object, org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Get a value from the object and set that in the respective field of the row.
void	writeFromObjectIntoRowForShallowInsert(java.lang.Object object, org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: This row is built for shallow insert which happens in case of bidirectional inserts.
void	writeFromObjectIntoRowForShallowInsertWithChangeRecord(org.eclipse.persistence.internal.sessions.ChangeRecord ChangeRecord, org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: This row is built for shallow insert which happens in case of bidirectional inserts.
void	writeFromObjectIntoRowWithChangeRecord(org.eclipse.persistence.internal.sessions.ChangeRecord changeRecord, org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Get a value from the object and set that in the respective field of the row.
void	writeInsertFieldsIntoRow(org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Write fields needed for insert into the template for with null values.

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

buildBackupCloneForPartObject, buildChangeRecord, buildCloneForPartObject, buildCopy, buildExpression, buildReferencesPKList, buildTargetInterfaces, cacheKeysAreEqual, cascadeDiscoverAndPersistUnregisteredNewObjects, cascadeDiscoverAndPersistUnregisteredNewObjects, cascadePerformRemoveIfRequired, cascadePerformRemoveIfRequired, cascadePerformRemovePrivateOwnedObjectFromChangeSetIfRequired, cascadeRegisterNewIfRequired, cascadeRegisterNewIfRequired, compareForChange, compareObjectsWithoutPrivateOwned, compareObjectsWithPrivateOwned, createUnitOfWorkValueHolder, extractPrimaryKeyRowForSourceObject, extractPrimaryKeysForReferenceObject, extractPrimaryKeysFromRealReferenceObject, fixRealObjectReferences, getDescriptorForTarget, getForeignKeyFields, getPrimaryKeyForObject, getRealAttributeValueFromAttribute, hasConstraintDependency, insert, internalBuildChangeRecord, isChangeTrackingSupported, isForeignKeyRelationship, isObjectReferenceMapping, iterateOnRealAttributeValue, mergeChangesIntoObject, mergeIntoObject, postCalculateChanges, postDelete, preInitialize, preInsert, preUpdate, recordPrivateOwnedRemovals, setForeignKeyFields, setIsForeignKeyRelationship, setNewValueInChangeRecord, update, updateChangeRecord, useProxyIndirection, useProxyIndirection, useProxyIndirection, valueFromPKList, verifyDelete, writeFromObjectIntoRowForUpdate, writeFromObjectIntoRowForWhereClause

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

batchedValueFromRow, buildBackupClone, buildClone, buildCloneFromRow, compareObjects, convertClassNamesToClasses, dontDoMerge, dontUseBatchReading, dontUseIndirection, fixObjectReferences, getAttributeValueFromObject, getAttributeValueWithClonedValueHolders, getBatchReadObjects, getIndirectionPolicy, getJoinCriteria, getJoinFetch, getObjectCorrespondingTo, getReferenceClass, getReferenceClassName, getReferenceDescriptor, getRelationshipPartner, getRelationshipPartnerAttributeName, getSelectionCriteria, getSelectionQuery, getTempSession, getValueFromRemoteValueHolder, hasCustomSelectionQuery, initializeReferenceDescriptor, initializeSelectionQuery, instantiateAttribute, isAttributeValueInstantiated, isCascadeMerge, isCascadePersist, isCascadeRefresh, isCascadeRemove, isExtendingPessimisticLockScope, isForeignReferenceMapping, isInnerJoinFetched, isJoinFetched, isLazy, isLockableMapping, isOuterJoinFetched, isPrivateOwned, iterate, mergeRemoteValueHolder, prepareHistoricalQuery, prepareNestedBatchQuery, prepareNestedJoinQueryClone, prepareNestedJoins, privateOwnedRelationship, remoteInitialization, replaceValueHoldersIn, requiresTransientWeavedFields, setBatchReadObjects, setCascadeAll, setCascadeMerge, setCascadePersist, setCascadeRefresh, setCascadeRemove, setCustomSelectionQuery, setForceInitializationOfSelectionCriteria, setHasCustomSelectionQuery, setIndirectionPolicy, setIsPrivateOwned, setJoinFetch, setRealAttributeValueInObject, setReferenceClass, setReferenceClassName, setReferenceDescriptor, setRelationshipPartner, setRelationshipPartnerAttributeName, setRequiresTransientWeavedFields, setSelectionCall, setSelectionCriteria, setSelectionQuery, setSelectionSQLString, setShouldExtendPessimisticLockScope, setTempSession, setUsesBatchReading, setUsesIndirection, shouldExtendPessimisticLockScope, shouldExtendPessimisticLockScopeInDedicatedQuery, shouldExtendPessimisticLockScopeInSourceQuery, shouldExtendPessimisticLockScopeInTargetQuery, shouldForceInitializationOfSelectionCriteria, shouldInitializeSelectionCriteria, shouldMergeCascadeParts, shouldMergeCascadeReference, shouldObjectModifyCascadeToParts, shouldUseBatchReading, shouldUseValueFromRowWithJoin, trimRowForJoin, trimRowForJoin, useBasicIndirection, useBatchReading, useContainerIndirection, useInnerJoinFetch, useOuterJoinFetch, usesIndirection, useWeavedIndirection, validateBeforeInitialization, valueFromRow

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

calculateDeferredChanges, cascadeMerge, cloneFields, earlyPreDelete, extractNestedExpressions, getAttributeAccessor, getAttributeClassification, getAttributeName, getContainerPolicy, getDescriptor, getField, getFields, getGetMethodName, getMappedByIdValue, getProperties, getProperty, getRealAttributeValueFromObject, getRealCollectionAttributeValueFromObject, getSelectFields, getSelectTables, getSetMethodName, getWeight, hasDependency, hasInverseConstraintDependency, hasMappedByIdValue, hasRootExpressionThatShouldUseOuterJoin, isAbstractCompositeCollectionMapping, isAbstractCompositeDirectCollectionMapping, isAbstractCompositeObjectMapping, isAbstractDirectMapping, isAggregateCollectionMapping, isAggregateMapping, isAggregateObjectMapping, isCandidateForPrivateOwnedRemoval, isCloningRequired, isCollectionMapping, isDatabaseMapping, isDerivedIdMapping, isDirectCollectionMapping, isDirectMapMapping, isDirectToFieldMapping, isDirectToXMLTypeMapping, isEISMapping, isManyToManyMapping, isMapKeyMapping, isNestedTableMapping, isOneToManyMapping, isOptional, isPrimaryKeyMapping, isReadOnly, isReferenceMapping, isRemotelyInitialized, isStructureMapping, isTransformationMapping, isUnidirectionalOneToManyMapping, isUsingMethodAccess, isVariableOneToOneMapping, isWriteOnly, isXMLMapping, postCalculateChangesOnDeleted, postInitialize, readFromResultSetIntoObject, readFromRowIntoObject, readOnly, readWrite, remotelyInitialized, setAttributeAccessor, setAttributeName, setAttributeValueInObject, setChangeListener, setDescriptor, setFields, setGetMethodName, setIsDerivedIdMapping, setIsLazy, setIsMapKeyMapping, setIsOptional, setIsPrimaryKeyMapping, setIsReadOnly, setMappedByIdValue, setProperties, setProperty, setSetMethodName, setWeight, simpleAddToCollectionChangeRecord, simpleRemoveFromCollectionChangeRecord, toString, updateCollectionChangeRecord, validateAfterInitialization, valueFromResultSet, valueFromRow, writeUpdateFieldsIntoRow

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.persistence.mappings.foundation.MapKeyMapping

cascadeDiscoverAndPersistUnregisteredNewObjects, cascadePerformRemoveIfRequired, cascadeRegisterNewIfRequired, getReferenceDescriptor

Field Detail

sourceToTargetKeyFields

protected java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField> sourceToTargetKeyFields

Maps the source foreign/primary key fields to the target primary/foreign key fields.

targetToSourceKeyFields

protected java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField> targetToSourceKeyFields

Maps the target primary/foreign key fields to the source foreign/primary key fields.

shouldVerifyDelete

protected boolean shouldVerifyDelete

These are used for non-unit of work modification to check if the value of the 1-1 was changed and a deletion is required.

privateOwnedCriteria

protected transient Expression privateOwnedCriteria

keyTableForMapKey

public org.eclipse.persistence.internal.helper.DatabaseTable keyTableForMapKey

setObject

protected static final java.lang.String setObject

See Also:

Constant Field Values

mechanism

protected transient RelationTableMechanism mechanism

Mechanism holds relationTable and all fields and queries associated with it.

Constructor Detail

OneToOneMapping

public OneToOneMapping()

PUBLIC: Default constructor.

Method Detail

isRelationalMapping

public boolean isRelationalMapping()

INTERNAL:

Overrides:

isRelationalMapping in class DatabaseMapping

addAdditionalFieldsToQuery

public void addAdditionalFieldsToQuery(ReadQuery selectionQuery,
                                       Expression baseExpression)

INTERNAL: Used when initializing queries for mappings that use a Map Called when the selection query is being initialized to add the fields for the map key to the query

Specified by:

addAdditionalFieldsToQuery in interface MapKeyMapping

addFieldsForMapKey

public void addFieldsForMapKey(org.eclipse.persistence.internal.sessions.AbstractRecord joinRow)

INTERNAL: Used when initializing queries for mappings that use a Map Called when the insert query is being initialized to ensure the fields for the map key are in the insert query

Specified by:

addFieldsForMapKey in interface MapKeyMapping

addForeignKeyField

public void addForeignKeyField(org.eclipse.persistence.internal.helper.DatabaseField sourceForeignKeyField,
                               org.eclipse.persistence.internal.helper.DatabaseField targetPrimaryKeyField)

PUBLIC: Define the foreign key relationship in the 1-1 mapping. This method is used for composite foreign key relationships, that is the source object's table has multiple foreign key fields to the target object's primary key fields. Both the source foreign key field and the target foreign key field must be specified. When a foreign key is specified TopLink will automatically populate the value for that field from the target object when the object is written to the database. If the foreign key is also mapped through a direct-to-field then the direct-to-field must be set read-only.

addForeignKeyFieldName

public void addForeignKeyFieldName(java.lang.String sourceForeignKeyFieldName,
                                   java.lang.String targetPrimaryKeyFieldName)

PUBLIC: Define the foreign key relationship in the 1-1 mapping. This method is used for composite foreign key relationships, that is the source object's table has multiple foreign key fields to the target object's primary key fields. Both the source foreign key field name and the target foreign key field name must be specified. When a foreign key is specified TopLink will automatically populate the value for that field from the target object when the object is written to the database. If the foreign key is also mapped through a direct-to-field then the direct-to-field must be set read-only.

addTargetForeignKeyField

public void addTargetForeignKeyField(org.eclipse.persistence.internal.helper.DatabaseField targetForeignKeyField,
                                     org.eclipse.persistence.internal.helper.DatabaseField sourcePrimaryKeyField)

PUBLIC: Define the target foreign key relationship in the 1-1 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 primary key fields. Both the target foreign key field and the source primary key field must be specified. The distinction between a foreign key and target foreign key is that the 1-1 mapping will not populate the target foreign key value when written (because it is in the target table). Normally 1-1's are through foreign keys but in bi-directional 1-1's the back reference will be a target foreign key. In obscure composite legacy data models a 1-1 may consist of a foreign key part and a target foreign key part, in this case both method will be called with the correct parts.

addTargetForeignKeyFieldName

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

PUBLIC: Define the target foreign key relationship in the 1-1 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 primary key fields. Both the target foreign key field name and the source primary key field name must be specified. The distinction between a foreign key and target foreign key is that the 1-1 mapping will not populate the target foreign key value when written (because it is in the target table). Normally 1-1's are through foreign keys but in bi-directional 1-1's the back reference will be a target foreign key. In obscure composite legacy data models a 1-1 may consist of a foreign key part and a target foreign key part, in this case both method will be called with the correct parts.

addKeyToDeletedObjectsList

public void addKeyToDeletedObjectsList(java.lang.Object object,
                                       java.util.Map deletedObjects)

INTERNAL: For mappings used as MapKeys in MappedKeyContainerPolicy. Add the target of this mapping to the deleted objects list if necessary This method is used for removal of private owned relationships

Specified by:

addKeyToDeletedObjectsList in interface MapKeyMapping

Parameters:

object -

manager -

buildElementClone

public java.lang.Object buildElementClone(java.lang.Object attributeValue,
                                          java.lang.Object parent,
                                          org.eclipse.persistence.internal.sessions.UnitOfWorkImpl unitOfWork,
                                          boolean isExisting)

Build a clone of the given element in a unitOfWork

Specified by:

buildElementClone in interface MapKeyMapping

Parameters:

element -

unitOfWork -

isExisting -

Returns:

buildObjectJoinExpression

public Expression buildObjectJoinExpression(Expression expression,
                                            java.lang.Object value,
                                            org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Used to allow object level comparisons.

Overrides:

buildObjectJoinExpression in class DatabaseMapping

buildObjectJoinExpression

public Expression buildObjectJoinExpression(Expression expression,
                                            Expression argument,
                                            org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Used to allow object level comparisons.

Overrides:

buildObjectJoinExpression in class DatabaseMapping

buildSelectionQueryForDirectCollectionKeyMapping

public ReadQuery buildSelectionQueryForDirectCollectionKeyMapping(org.eclipse.persistence.internal.queries.ContainerPolicy containerPolicy)

INTERNAL: Certain key mappings favor different types of selection query. Return the appropriate type of selectionQuery

Specified by:

buildSelectionQueryForDirectCollectionKeyMapping in interface MapKeyMapping

Returns:

clone

public java.lang.Object clone()

INTERNAL: This methods clones all the fields and ensures that each collection refers to the same clones.

Overrides:

clone in class ForeignReferenceMapping

createMapComponentFromRow

public java.lang.Object createMapComponentFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord dbRow,
                                                  ObjectBuildingQuery query,
                                                  org.eclipse.persistence.internal.sessions.AbstractSession session)

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

Specified by:

createMapComponentFromRow in interface MapComponentMapping

createMapComponentFromJoinedRow

public java.lang.Object createMapComponentFromJoinedRow(org.eclipse.persistence.internal.sessions.AbstractRecord dbRow,
                                                        org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
                                                        ObjectBuildingQuery query,
                                                        org.eclipse.persistence.internal.sessions.AbstractSession session)

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

Specified by:

createMapComponentFromJoinedRow in interface MapKeyMapping

createQueryKeyForMapKey

public QueryKey createQueryKeyForMapKey()

INTERNAL: Create a query key that links to the map key

Specified by:

createQueryKeyForMapKey in interface MapKeyMapping

Returns:

deleteMapKey

public void deleteMapKey(java.lang.Object objectDeleted,
                         org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: For mappings used as MapKeys in MappedKeyContainerPolicy, Delete the passed object if necessary. This method is used for removal of private owned relationships

Specified by:

deleteMapKey in interface MapKeyMapping

Parameters:

objectDeleted -

session -

extendPessimisticLockScopeInTargetQuery

protected void extendPessimisticLockScopeInTargetQuery(ObjectLevelReadQuery targetQuery,
                                                       ObjectBuildingQuery sourceQuery)

INTERNAL: Adds locking clause to the target query to extend pessimistic lock scope.

Overrides:

extendPessimisticLockScopeInTargetQuery in class ForeignReferenceMapping

extendPessimisticLockScopeInSourceQuery

public void extendPessimisticLockScopeInSourceQuery(ObjectLevelReadQuery sourceQuery)

INTERNAL: Called only if both shouldExtendPessimisticLockScope and shouldExtendPessimisticLockScopeInSourceQuery are true. Adds fields to be locked to the where clause of the source query. Note that the sourceQuery must be ObjectLevelReadQuery so that it has ExpressionBuilder. This method must be implemented in subclasses that allow setting shouldExtendPessimisticLockScopeInSourceQuery to true.

Overrides:

extendPessimisticLockScopeInSourceQuery in class ForeignReferenceMapping

extractForeignKeyFromRow

protected java.util.Vector extractForeignKeyFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord row,
                                                    org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Extract the foreign key value from the source row.

extractIdentityFieldsForQuery

public java.util.Map extractIdentityFieldsForQuery(java.lang.Object object,
                                                   org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Extract the fields for the Map key from the object to use in a query

Specified by:

extractIdentityFieldsForQuery in interface MapKeyMapping

Returns:

extractKeyFromReferenceObject

protected java.util.Vector extractKeyFromReferenceObject(java.lang.Object object,
                                                         org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Extract the key value from the reference object.

extractPrimaryKeysForReferenceObjectFromRow

public java.util.Vector extractPrimaryKeysForReferenceObjectFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord row)

INTERNAL: Return the primary key for the reference object (i.e. the object object referenced by domainObject and specified by mapping). This key will be used by a RemoteValueHolder.

Overrides:

extractPrimaryKeysForReferenceObjectFromRow in class ObjectReferenceMapping

postPrepareNestedBatchQuery

protected void postPrepareNestedBatchQuery(ReadQuery batchQuery,
                                           ReadAllQuery query)

INTERNAL: Allow the mapping the do any further batch preparation.

Overrides:

postPrepareNestedBatchQuery in class ForeignReferenceMapping

extractResultFromBatchQuery

public java.lang.Object extractResultFromBatchQuery(DatabaseQuery query,
                                                    org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow,
                                                    org.eclipse.persistence.internal.sessions.AbstractSession session,
                                                    org.eclipse.persistence.internal.sessions.AbstractRecord argumentRow)

INTERNAL: Extract the value from the batch optimized query.

Overrides:

extractResultFromBatchQuery in class ForeignReferenceMapping

getAdditionalSelectionCriteriaForMapKey

public Expression getAdditionalSelectionCriteriaForMapKey()

INTERNAL: Return the selection criteria necessary to select the target object when this mapping is a map key.

Specified by:

getAdditionalSelectionCriteriaForMapKey in interface MapKeyMapping

Returns:

getAdditionalTablesForJoinQuery

public java.util.List<org.eclipse.persistence.internal.helper.DatabaseTable> getAdditionalTablesForJoinQuery()

INTERNAL: Return any tables that will be required when this mapping is used as part of a join query

Specified by:

getAdditionalTablesForJoinQuery in interface MapKeyMapping

Returns:

getExtendPessimisticLockScopeDedicatedQuery

protected ReadQuery getExtendPessimisticLockScopeDedicatedQuery(org.eclipse.persistence.internal.sessions.AbstractSession session,
                                                                short lockMode)

INTERNAL: Should be overridden by subclass that allows setting extendPessimisticLockScope to DEDICATED_QUERY.

Overrides:

getExtendPessimisticLockScopeDedicatedQuery in class ForeignReferenceMapping

getFieldClassification

public java.lang.Class getFieldClassification(org.eclipse.persistence.internal.helper.DatabaseField fieldToClassify)
                                       throws DescriptorException

INTERNAL: Return the classification for the field contained in the mapping. This is used to convert the row value to a consistent java value.

Overrides:

getFieldClassification in class DatabaseMapping

Throws:

DescriptorException

getForeignKeyFieldNames

public java.util.Vector getForeignKeyFieldNames()

PUBLIC: Return the foreign key field names associated with the mapping. These are only the source fields that are writable.

getForeignKeysToPrimaryKeys

protected java.util.Map getForeignKeysToPrimaryKeys()

Return the appropriate hashtable that maps the "foreign keys" to the "primary keys".

getForeignKeyFieldsForMapKey

public java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField> getForeignKeyFieldsForMapKey()

INTERNAL: Return a Map of any foreign keys defined within the the MapKey

Specified by:

getForeignKeyFieldsForMapKey in interface MapKeyMapping

Returns:

getIdentityFieldsForMapKey

public java.util.List<org.eclipse.persistence.internal.helper.DatabaseField> getIdentityFieldsForMapKey()

INTERNAL: Return the fields that make up the identity of the mapped object. For mappings with a primary key, it will be the set of fields in the primary key. For mappings without a primary key it will likely be all the fields

Specified by:

getIdentityFieldsForMapKey in interface MapKeyMapping

Returns:

getNestedJoinQuery

public ObjectLevelReadQuery getNestedJoinQuery(org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
                                               ObjectLevelReadQuery query,
                                               org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Return the query that is used when this mapping is part of a joined relationship This method is used when this mapping is used to map the key in a Map

Specified by:

getNestedJoinQuery in interface MapKeyMapping

Returns:

getAllFieldsForMapKey

public java.util.List<org.eclipse.persistence.internal.helper.DatabaseField> getAllFieldsForMapKey()

INTERNAL: Get all the fields for the map key

Specified by:

getAllFieldsForMapKey in interface MapKeyMapping

getOrderedForeignKeyFields

public java.util.Vector getOrderedForeignKeyFields()

INTERNAL: Return a vector of the foreign key fields in the same order as the corresponding primary key fields are in their descriptor.

getPrimaryKeyDescriptor

protected ClassDescriptor getPrimaryKeyDescriptor()

Return the descriptor for whichever side of the relation has the "primary key".

getPrivateOwnedCriteria

public Expression getPrivateOwnedCriteria()

INTERNAL: The private owned criteria is only used outside of the unit of work to compare the previous value of the reference.

getSourceToTargetKeyFieldAssociations

public java.util.Vector getSourceToTargetKeyFieldAssociations()

INTERNAL: Return a collection of the source to target field value associations.

getSourceToTargetKeyFields

public java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField> getSourceToTargetKeyFields()

INTERNAL: Returns the source keys to target keys fields association.

getTargetToSourceKeyFields

public java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField> getTargetToSourceKeyFields()

INTERNAL: Returns the target keys to source keys fields association.

getTargetVersionOfSourceObject

public java.lang.Object getTargetVersionOfSourceObject(java.lang.Object object,
                                                       java.lang.Object parent,
                                                       org.eclipse.persistence.internal.sessions.MergeManager mergeManager)

INTERNAL: If required, get the targetVersion of the source object from the merge manager Used with MapKeyContainerPolicy to abstract getting the target version of a source key

Specified by:

getTargetVersionOfSourceObject in interface MapKeyMapping

Returns:

getMapKeyTargetType

public java.lang.Class getMapKeyTargetType()

INTERNAL: Return the class this key mapping maps or the descriptor for it

Specified by:

getMapKeyTargetType in interface MapKeyMapping

Returns:

initialize

public void initialize(org.eclipse.persistence.internal.sessions.AbstractSession session)
                throws DescriptorException

INTERNAL: Initialize the mapping.

Overrides:

initialize in class ForeignReferenceMapping

Throws:

DescriptorException

initializeForeignKeys

protected void initializeForeignKeys(org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: The foreign keys primary keys are stored as database fields in the map.

initializeForeignKeysWithDefaults

protected void initializeForeignKeysWithDefaults(org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: The foreign keys primary keys are stored as database fields in the map.

initializePrivateOwnedCriteria

protected void initializePrivateOwnedCriteria()

INTERNAL: Selection criteria is created with source foreign keys and target keys.

preinitializeMapKey

public void preinitializeMapKey(org.eclipse.persistence.internal.helper.DatabaseTable table)
                         throws DescriptorException

INTERNAL: Making any mapping changes necessary to use a the mapping as a map key prior to initializing the mapping

Specified by:

preinitializeMapKey in interface MapKeyMapping

Throws:

DescriptorException

postInitializeMapValueSelectionQuery

public void postInitializeMapValueSelectionQuery(ReadQuery selectionQuery,
                                                 org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Allow the selectionQuery to be modified when this MapComponentMapping is used as the value in a Map

prepareCascadeLockingPolicy

public void prepareCascadeLockingPolicy()

INTERNAL: Prepare a cascade locking policy.

Overrides:

prepareCascadeLockingPolicy in class DatabaseMapping

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.

buildSelectionCriteria

public Expression buildSelectionCriteria(boolean useParameter,
                                         boolean usePreviousSelectionCriteria)

INTERNAL: Build the selection criteria for this mapping. Allows several variations. Either a parameter can be used for the join or simply the database field The existing selection criteria can be built upon or a whole new criteria can be built.

Parameters:

useParameter -

usePreviousSelectionCriteria -

Returns:

buildShallowOriginalFromRow

public void buildShallowOriginalFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow,
                                        java.lang.Object original,
                                        org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
                                        ObjectBuildingQuery query,
                                        org.eclipse.persistence.internal.sessions.AbstractSession executionSession)

INTERNAL: Builds a shallow original object. Only direct attributes and primary keys are populated. In this way the minimum original required for instantiating a working copy clone can be built without placing it in the shared cache (no concern over cycles).

Overrides:

buildShallowOriginalFromRow in class DatabaseMapping

isOneToOneMapping

public boolean isOneToOneMapping()

INTERNAL:

Overrides:

isOneToOneMapping in class DatabaseMapping

readPrivateOwnedForObject

protected java.lang.Object readPrivateOwnedForObject(ObjectLevelModifyQuery modifyQuery)
                                              throws DatabaseException

INTERNAL: Reads the private owned object.

Overrides:

readPrivateOwnedForObject in class ObjectReferenceMapping

Throws:

DatabaseException

rehashFieldDependancies

public void rehashFieldDependancies(org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Rehash any map based on fields. This is used to clone descriptors for aggregates, which hammer field names, it is probably better not to hammer the field name and this should be refactored.

Overrides:

rehashFieldDependancies in class DatabaseMapping

setForeignKeyFieldName

public void setForeignKeyFieldName(java.lang.String sourceForeignKeyFieldName)

PUBLIC: Define the foreign key relationship in the 1-1 mapping. This method is used for singleton foreign key relationships only, that is the source object's table has a foreign key field to the target object's primary key field. Only the source foreign key field name is specified. When a foreign key is specified TopLink will automatically populate the value for that field from the target object when the object is written to the database. If the foreign key is also mapped through a direct-to-field then the direct-to-field must be set read-only.

setForeignKeyFieldNames

public void setForeignKeyFieldNames(java.util.Vector fieldNames)

PUBLIC: Return the foreign key field names associated with the mapping. These are only the source fields that are writable.

setPrivateOwnedCriteria

protected void setPrivateOwnedCriteria(Expression expression)

INTERNAL: Private owned criteria is used to verify the deletion of the target. It joins from the source table on the foreign key to the target table, with a parameterization of the primary key of the source object.

setShouldVerifyDelete

public void setShouldVerifyDelete(boolean shouldVerifyDelete)

PUBLIC: Verify delete is used during delete and update on private 1:1's outside of a unit of work only. It checks for the previous value of the target object through joining the source and target tables. By default it is always done, but may be disabled for performance on distributed database reasons. In the unit of work the previous value is obtained from the backup-clone so it is never used.

setSourceToTargetKeyFieldAssociations

public void setSourceToTargetKeyFieldAssociations(java.util.Vector sourceToTargetKeyFieldAssociations)

INTERNAL: Set a collection of the source to target field associations.

setSourceToTargetKeyFields

public void setSourceToTargetKeyFields(java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField> sourceToTargetKeyFields)

INTERNAL: Set the source keys to target keys fields association.

setTargetForeignKeyFieldName

public void setTargetForeignKeyFieldName(java.lang.String targetForeignKeyFieldName)

PUBLIC: Define the target foreign key relationship in the 1-1 mapping. This method is used for singleton target foreign key relationships only, that is the target object's table has a foreign key field to the source object's primary key field. The target foreign key field name is specified. The distinction between a foreign key and target foreign key is that the 1-1 mapping will not populate the target foreign key value when written (because it is in the target table). Normally 1-1's are through foreign keys but in bi-directional 1-1's the back reference will be a target foreign key.

setTargetToSourceKeyFields

public void setTargetToSourceKeyFields(java.util.Map<org.eclipse.persistence.internal.helper.DatabaseField,org.eclipse.persistence.internal.helper.DatabaseField> targetToSourceKeyFields)

INTERNAL: Set the target keys to source keys fields association.

shouldVerifyDelete

public boolean shouldVerifyDelete()

PUBLIC: Verify delete is used during delete and update outside of a unit of work only. It checks for the previous value of the target object through joining the source and target tables.

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

iterateOnMapKey

public void iterateOnMapKey(org.eclipse.persistence.internal.descriptors.DescriptorIterator iterator,
                            java.lang.Object element)

INTERNAL: Called when iterating through descriptors to handle iteration on this mapping when it is used as a MapKey

Specified by:

iterateOnMapKey in interface MapKeyMapping

Parameters:

iterator -

element -

unwrapKey

public java.lang.Object unwrapKey(java.lang.Object key,
                                  org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Allow the key mapping to unwrap the object

Specified by:

unwrapKey in interface MapKeyMapping

Parameters:

key -

session -

Returns:

wrapKey

public java.lang.Object wrapKey(java.lang.Object key,
                                org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Allow the key mapping to wrap the object

Specified by:

wrapKey in interface MapKeyMapping

Parameters:

key -

session -

Returns:

writeFromAttributeIntoRow

public void writeFromAttributeIntoRow(java.lang.Object attribute,
                                      org.eclipse.persistence.internal.sessions.AbstractRecord row,
                                      org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: A subclass should implement this method if it wants different behavior. Write the foreign key values from the attribute to the row.

Overrides:

writeFromAttributeIntoRow in class DatabaseMapping

valueFromObject

public java.lang.Object valueFromObject(java.lang.Object object,
                                        org.eclipse.persistence.internal.helper.DatabaseField field,
                                        org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Get a value from the object and set that in the respective field of the row.

Overrides:

valueFromObject in class DatabaseMapping

valueFromRowInternalWithJoin

protected java.lang.Object valueFromRowInternalWithJoin(org.eclipse.persistence.internal.sessions.AbstractRecord row,
                                                        org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
                                                        ObjectBuildingQuery sourceQuery,
                                                        org.eclipse.persistence.internal.sessions.AbstractSession executionSession)
                                                 throws DatabaseException

INTERNAL: Return the value of the field from the row or a value holder on the query to obtain the object. Check for batch + aggregation reading.

Overrides:

valueFromRowInternalWithJoin in class ForeignReferenceMapping

Throws:

DatabaseException

valueFromRowInternal

protected java.lang.Object valueFromRowInternal(org.eclipse.persistence.internal.sessions.AbstractRecord row,
                                                org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
                                                ObjectBuildingQuery sourceQuery,
                                                org.eclipse.persistence.internal.sessions.AbstractSession executionSession)
                                         throws DatabaseException

INTERNAL: Return the value of the field from the row or a value holder on the query to obtain the object. Check for batch + aggregation reading.

Overrides:

valueFromRowInternal in class ForeignReferenceMapping

Throws:

DatabaseException

writeFromObjectIntoRow

public void writeFromObjectIntoRow(java.lang.Object object,
                                   org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow,
                                   org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Get a value from the object and set that in the respective field of the row.

Overrides:

writeFromObjectIntoRow in class DatabaseMapping

writeFromObjectIntoRowForShallowInsert

public void writeFromObjectIntoRowForShallowInsert(java.lang.Object object,
                                                   org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow,
                                                   org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: This row is built for shallow insert which happens in case of bidirectional inserts. The foreign keys must be set to null to avoid constraints.

Overrides:

writeFromObjectIntoRowForShallowInsert in class DatabaseMapping

writeFromObjectIntoRowWithChangeRecord

public void writeFromObjectIntoRowWithChangeRecord(org.eclipse.persistence.internal.sessions.ChangeRecord changeRecord,
                                                   org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow,
                                                   org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Get a value from the object and set that in the respective field of the row. Validation preventing primary key updates is implemented here.

Overrides:

writeFromObjectIntoRowWithChangeRecord in class DatabaseMapping

writeFromObjectIntoRowForShallowInsertWithChangeRecord

public void writeFromObjectIntoRowForShallowInsertWithChangeRecord(org.eclipse.persistence.internal.sessions.ChangeRecord ChangeRecord,
                                                                   org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow,
                                                                   org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: This row is built for shallow insert which happens in case of bidirectional inserts. The foreign keys must be set to null to avoid constraints.

Overrides:

writeFromObjectIntoRowForShallowInsertWithChangeRecord in class DatabaseMapping

writeInsertFieldsIntoRow

public void writeInsertFieldsIntoRow(org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow,
                                     org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: Write fields needed for insert into the template for with null values.

Overrides:

writeInsertFieldsIntoRow in class DatabaseMapping

hasRelationTableMechanism

public boolean hasRelationTableMechanism()

PUBLIC: Indicates whether the mapping has RelationTableMechanism.

hasRelationTable

public boolean hasRelationTable()

PUBLIC: Indicates whether the mapping has RelationTable.

getRelationTableMechanism

public RelationTableMechanism getRelationTableMechanism()

PUBLIC: Returns RelationTableMechanism that may be owned by the mapping, that allows to configure the mapping to use relation table (just like ManyToManyMapping). By default its null, should be created and set into the mapping before use.

setRelationTableMechanism

public void setRelationTableMechanism(RelationTableMechanism mechanism)

PUBLIC: Set RelationTableMechanism into the mapping, that allows to configure the mapping to use relation table (just like ManyToManyMapping).

getRelationTable

public org.eclipse.persistence.internal.helper.DatabaseTable getRelationTable()

PUBLIC: Return RelationTable.

preDelete

public void preDelete(DeleteObjectQuery query)
               throws DatabaseException,
                      OptimisticLockException

INTERNAL: Delete privately owned parts

Overrides:

preDelete in class ObjectReferenceMapping

Throws:

DatabaseException

OptimisticLockException

postInsert

public void postInsert(WriteObjectQuery query)
                throws DatabaseException

INTERNAL: Insert into relation table. 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 a insert statement with above fields and values for relation table.

- execute the statement.

Overrides:

postInsert in class ObjectReferenceMapping

Throws:

DatabaseException

postUpdate

public void postUpdate(WriteObjectQuery query)
                throws DatabaseException

INTERNAL: Update the relation table with the entries related to this mapping. Delete entries removed, insert entries added. If private also insert/delete/update target objects.

Overrides:

postUpdate in class ObjectReferenceMapping

Throws:

DatabaseException

performDataModificationEvent

public void performDataModificationEvent(java.lang.Object[] event,
                                         org.eclipse.persistence.internal.sessions.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

collectFields

protected java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> collectFields()

INTERNAL: Return all the fields populated by this mapping, these are foreign keys only.

Overrides:

collectFields in class ObjectReferenceMapping