Package org.eclipse.persistence.mappings.structures

Class ReferenceMapping

java.lang.Object

org.eclipse.persistence.core.mappings.CoreMapping<AttributeAccessor,org.eclipse.persistence.internal.sessions.AbstractSession,org.eclipse.persistence.internal.queries.ContainerPolicy,ClassDescriptor,org.eclipse.persistence.internal.helper.DatabaseField>

org.eclipse.persistence.mappings.DatabaseMapping

org.eclipse.persistence.mappings.ForeignReferenceMapping

org.eclipse.persistence.mappings.ObjectReferenceMapping

org.eclipse.persistence.mappings.structures.ReferenceMapping

All Implemented Interfaces:

Serializable, Cloneable

public class ReferenceMapping
extends ObjectReferenceMapping

Purpose: In an object-relational data model, structures reference each other through "Refs"; not through foreign keys as in the relational data model. TopLink supports using the Ref to reference the target object.

See Also:

• Serialized Form

Nested Class Summary

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

DatabaseMapping.WriteType

Field Summary

Fields

Modifier and Type	Field	Description
protected org.eclipse.persistence.internal.helper.DatabaseField	field	A ref is always stored in a single field.

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

foreignKeyFields, isForeignKeyRelationship

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

batchFetchType, cascadeDetach, cascadeMerge, cascadePersist, cascadeRefresh, cascadeRemove, forceInitializationOfSelectionCriteria, hasCustomSelectionQuery, indirectionPolicy, INNER_JOIN, isCascadeOnDeleteSetOnDatabase, isPrivateOwned, joinFetch, mappedBy, NONE, OUTER_JOIN, partitioningPolicy, partitioningPolicyName, QUERY_BATCH_PARAMETER, referenceClass, referenceClassName, referenceDescriptor, relationshipPartner, relationshipPartnerAttributeName, requiresTransientWeavedFields, selectionQuery, tempInitSession

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

attributeAccessor, attributeName, derivedIdMapping, derivesId, descriptor, fields, isCacheable, isInSopObject, isJPAId, isLazy, isMapKeyMapping, isOptional, isPrimaryKeyMapping, isReadOnly, isRemotelyInitialized, mapsIdValue, NO_FIELDS, NO_WEIGHT, properties, unconvertedProperties, weight, WEIGHT_AGGREGATE, WEIGHT_DIRECT, WEIGHT_TO_ONE, WEIGHT_TRANSFORM

Constructor Summary

Constructors

Constructor	Description
ReferenceMapping()

Method Summary

Modifier and Type	Method	Description
Expression	buildExpression(Object queryObject, QueryByExamplePolicy policy, Expression expressionBuilder, Map processedObjects, org.eclipse.persistence.internal.sessions.AbstractSession session)	INTERNAL: In case Query By Example is used, this method builds and returns an expression that corresponds to a single attribute and it's value.
protected Vector	collectFields()	Returns all the aggregate fields.
org.eclipse.persistence.internal.helper.DatabaseField	getField()	INTERNAL: Returns the field which this mapping represents.
String	getFieldName()	PUBLIC: Return the name of the field this mapping represents.
Expression	getJoinCriteria(org.eclipse.persistence.internal.expressions.ObjectExpression context, Expression base)	INTERNAL: Join criteria is created to read target records (nested table) from the table.
boolean	hasConstraintDependency()	INTERNAL: The returns if the mapping has any constraint dependencies, such as foreign keys and join tables.
void	initialize(org.eclipse.persistence.internal.sessions.AbstractSession session)	INTERNAL: Initialize the mapping.
boolean	isReferenceMapping()	INTERNAL:
boolean	isRelationalMapping()	INTERNAL:
void	postDelete(DeleteObjectQuery query)	INTERNAL: Delete privately owned parts
void	postInsert(WriteObjectQuery query)	INTERNAL: Insert privately owned parts
void	postUpdate(WriteObjectQuery query)	INTERNAL: Update privately owned parts
void	preDelete(DeleteObjectQuery query)	INTERNAL: Delete privately owned parts
void	preInsert(WriteObjectQuery query)	INTERNAL: Insert privately owned parts
void	preUpdate(WriteObjectQuery query)	INTERNAL: Update privately owned parts
protected void	setField(org.eclipse.persistence.internal.helper.DatabaseField field)	Set the field in the mapping.
void	setFieldName(String fieldName)	PUBLIC: Set the field name in the mapping.
void	setReferenceClass(Class referenceClass)	PUBLIC: This is a reference class whose instances this mapping will store in the domain objects.
Object	valueFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord row, org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager, ObjectBuildingQuery query, org.eclipse.persistence.internal.identitymaps.CacheKey cacheKey, org.eclipse.persistence.internal.sessions.AbstractSession executionSession, boolean isTargetProtected, Boolean[] wasCacheUsed)	INTERNAL: Return the value of the field from the row or a value holder on the query to obtain the object.
void	writeFromObjectIntoRow(Object object, org.eclipse.persistence.internal.sessions.AbstractRecord record, org.eclipse.persistence.internal.sessions.AbstractSession session, DatabaseMapping.WriteType writeType)	INTERNAL: Get a value from the object and set that in the respective field of the row.
void	writeFromObjectIntoRowForShallowInsert(Object object, org.eclipse.persistence.internal.sessions.AbstractRecord record, 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 record, org.eclipse.persistence.internal.sessions.AbstractSession session)	INTERNAL: This row is built for shallow insert which happens in case of bidirectional inserts.
void	writeFromObjectIntoRowForUpdateAfterShallowInsert(Object object, org.eclipse.persistence.internal.sessions.AbstractRecord record, org.eclipse.persistence.internal.sessions.AbstractSession session, org.eclipse.persistence.internal.helper.DatabaseTable table)	INTERNAL: This row is built for update after shallow insert which happens in case of bidirectional inserts.
void	writeFromObjectIntoRowInternal(Object object, org.eclipse.persistence.internal.sessions.AbstractRecord record, org.eclipse.persistence.internal.sessions.AbstractSession session, boolean shouldIgnoreNull)	INTERNAL: Get a value from the object and set that in the respective field of the row.
void	writeFromObjectIntoRowWithChangeRecord(org.eclipse.persistence.internal.sessions.ChangeRecord changeRecord, org.eclipse.persistence.internal.sessions.AbstractRecord record, org.eclipse.persistence.internal.sessions.AbstractSession session, DatabaseMapping.WriteType writeType)	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 record, 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, buildReferencesPKList, buildTargetInterfaces, buildUnitofWorkCloneForPartObject, cascadeDiscoverAndPersistUnregisteredNewObjects, cascadeDiscoverAndPersistUnregisteredNewObjects, cascadePerformRemoveIfRequired, cascadePerformRemoveIfRequired, cascadePerformRemovePrivateOwnedObjectFromChangeSetIfRequired, cascadeRegisterNewIfRequired, cascadeRegisterNewIfRequired, collectQueryParameters, compareForChange, compareObjectsWithoutPrivateOwned, compareObjectsWithPrivateOwned, createCloneValueHolder, earlyPreDelete, extractPrimaryKeyRowForSourceObject, extractPrimaryKeysForReferenceObject, extractPrimaryKeysForReferenceObjectFromRow, extractPrimaryKeysFromRealReferenceObject, fixRealObjectReferences, getDescriptorForTarget, getForeignKeyFields, getPrimaryKeyForObject, getRealAttributeValueFromAttribute, hasRelationTableMechanism, insert, internalBuildChangeRecord, isChangeTrackingSupported, isForeignKeyRelationship, isObjectReferenceMapping, iterateOnRealAttributeValue, loadAll, mergeChangesIntoObject, mergeIntoObject, postCalculateChanges, preInitialize, readPrivateOwnedForObject, recordPrivateOwnedRemovals, setForeignKeyFields, setIsForeignKeyRelationship, setNewValueInChangeRecord, update, updateChangeRecord, updateChangeRecordForSelfMerge, useProxyIndirection, useProxyIndirection, useProxyIndirection, valueFromPKList, verifyDelete, writeFromObjectIntoRowForUpdate, writeFromObjectIntoRowForWhereClause

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

addForeignKeyField, addTargetForeignKeyField, batchedValueFromRow, buildBackupClone, buildBatchCriteria, buildClone, buildCloneFromRow, checkCacheForBatchKey, clone, compareObjects, convertClassNamesToClasses, dontDoMerge, dontUseBatchReading, dontUseIndirection, executeBatchQuery, extendPessimisticLockScopeInSourceQuery, extendPessimisticLockScopeInTargetQuery, extractBatchKeyFromRow, extractResultFromBatchQuery, fixObjectReferences, getAttributeValueFromObject, getAttributeValueWithClonedValueHolders, getBatchFetchType, getExtendPessimisticLockScopeDedicatedQuery, getFieldsForTranslationInAggregate, getIndirectionPolicy, getJoinFetch, getMappedBy, getObjectCorrespondingTo, getOrderByNormalizedExpressions, getPartitioningPolicy, getPartitioningPolicyName, getReferenceClass, getReferenceClassName, getReferenceDescriptor, getRelationshipPartner, getRelationshipPartnerAttributeName, getSelectionCriteria, getSelectionQuery, getTempSession, getValueFromRemoteValueHolder, hasCustomSelectionQuery, hasDependency, hasNestedIdentityReference, initializeReferenceDescriptor, initializeSelectionQuery, instantiateAttribute, isAttributeValueFromObjectInstantiated, isAttributeValueFullyBuilt, isAttributeValueInstantiated, isCascadeDetach, isCascadeMerge, isCascadeOnDeleteSetOnDatabase, isCascadePersist, isCascadeRefresh, isCascadeRemove, isExtendingPessimisticLockScope, isForeignReferenceMapping, isInnerJoinFetched, isJoinFetched, isJoiningSupported, isLazy, isLockableMapping, isOuterJoinFetched, isPrivateOwned, iterate, load, mergeRemoteValueHolder, postPrepareNestedBatchQuery, prepareHistoricalQuery, prepareNestedBatchQuery, prepareNestedJoinQueryClone, prepareNestedJoins, privateOwnedRelationship, readFromRowIntoObject, remoteInitialization, replaceValueHoldersIn, requiresTransientWeavedFields, setBatchFetchType, setCascadeAll, setCascadeDetach, setCascadeMerge, setCascadePersist, setCascadeRefresh, setCascadeRemove, setCustomSelectionQuery, setForceInitializationOfSelectionCriteria, setHasCustomSelectionQuery, setIndirectionPolicy, setIsCacheable, setIsCascadeOnDeleteSetOnDatabase, setIsPrivateOwned, setJoinFetch, setMappedBy, setPartitioningPolicy, setPartitioningPolicyName, setRealAttributeValueInObject, setReferenceClassName, setReferenceDescriptor, setRelationshipPartner, setRelationshipPartnerAttributeName, setRequiresTransientWeavedFields, setSelectionCall, setSelectionCriteria, setSelectionQuery, setSelectionSQLString, setShouldExtendPessimisticLockScope, setTempSession, setUsesBatchReading, setUsesIndirection, shouldExtendPessimisticLockScope, shouldExtendPessimisticLockScopeInDedicatedQuery, shouldExtendPessimisticLockScopeInSourceQuery, shouldExtendPessimisticLockScopeInTargetQuery, shouldForceInitializationOfSelectionCriteria, shouldInitializeSelectionCriteria, shouldMergeCascadeParts, shouldMergeCascadeReference, shouldObjectModifyCascadeToParts, shouldRefreshCascadeParts, shouldUseBatchReading, shouldUseValueFromRowWithJoin, trimRowForJoin, trimRowForJoin, useBasicIndirection, useBatchReading, useContainerIndirection, useInnerJoinFetch, useOuterJoinFetch, usesIndirection, useWeavedIndirection, validateBeforeInitialization, valueFromRowInternal, valueFromRowInternal, valueFromRowInternalWithJoin

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

addUnconvertedProperty, buildContainerClone, buildObjectJoinExpression, buildObjectJoinExpression, buildShallowOriginalFromRow, calculateDeferredChanges, cloneFields, convertConverterClassNamesToClasses, derivesId, extractNestedExpressions, extractNestedNonAggregateExpressions, getAttributeAccessor, getAttributeClassification, getAttributeName, getContainerPolicy, getDerivedIdMapping, getDescriptor, getFieldClassification, getFields, getGetMethodName, getMapsIdValue, getProperties, getProperty, getRealAttributeValueFromObject, getRealCollectionAttributeValueFromObject, getSelectFields, getSelectTables, getSetMethodName, getUnconvertedProperties, getWeight, hasInverseConstraintDependency, hasMapsIdValue, hasRootExpressionThatShouldUseOuterJoin, hasUnconvertedProperties, isAbstractColumnMapping, isAbstractCompositeCollectionMapping, isAbstractCompositeDirectCollectionMapping, isAbstractCompositeObjectMapping, isAbstractDirectMapping, isAggregateCollectionMapping, isAggregateMapping, isAggregateObjectMapping, isCacheable, isCandidateForPrivateOwnedRemoval, isCascadedLockingSupported, isCloningRequired, isCollectionMapping, isDatabaseMapping, isDirectCollectionMapping, isDirectMapMapping, isDirectToFieldMapping, isDirectToXMLTypeMapping, isEISMapping, isElementCollectionMapping, isInAndOutSopObject, isInOnlySopObject, isInSopObject, isJPAId, isManyToManyMapping, isManyToOneMapping, isMapKeyMapping, isMultitenantPrimaryKeyMapping, isNestedTableMapping, isOneToManyMapping, isOneToOneMapping, isOptional, isOutOnlySopObject, isOutSopObject, isOwned, isPrimaryKeyMapping, isReadOnly, isRemotelyInitialized, isStructureMapping, isTransformationMapping, isUnidirectionalOneToManyMapping, isUsingMethodAccess, isVariableOneToOneMapping, isWriteOnly, isXMLMapping, performDataModificationEvent, postCalculateChangesOnDeleted, postInitialize, postInitializeSourceAndTargetExpressions, prepareCascadeLockingPolicy, readFromResultSetIntoObject, readOnly, readWrite, rehashFieldDependancies, remotelyInitialized, setAttributeAccessor, setAttributeName, setAttributeValueInObject, setChangeListener, setDerivedIdMapping, setDerivesId, setDescriptor, setFields, setGetMethodName, setIsInAndOutSopObject, setIsInSopObject, setIsJPAId, setIsLazy, setIsMapKeyMapping, setIsOptional, setIsOutSopObject, setIsPrimaryKeyMapping, setIsReadOnly, setMapsIdValue, setProperties, setProperty, setSetMethodName, setWeight, simpleAddToCollectionChangeRecord, simpleRemoveFromCollectionChangeRecord, toString, updateCollectionChangeRecord, validateAfterInitialization, valueFromObject, valueFromResultSet, valueFromRow, writeFromAttributeIntoRow, writeFromObjectIntoRowForUpdateBeforeShallowDelete, writeUpdateFieldsIntoRow

Methods inherited from class java.lang.Object

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

Field Details

field

protected org.eclipse.persistence.internal.helper.DatabaseField field

A ref is always stored in a single field.

Constructor Details

ReferenceMapping

public ReferenceMapping()

Method Details

buildExpression

public Expression buildExpression(Object queryObject,
 QueryByExamplePolicy policy,
 Expression expressionBuilder,
 Map processedObjects,
 org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: In case Query By Example is used, this method builds and returns an expression that corresponds to a single attribute and it's value.

Overrides:

buildExpression in class ObjectReferenceMapping

collectFields

protected Vector collectFields()

Returns all the aggregate fields.

Overrides:

collectFields in class ObjectReferenceMapping

getField

public org.eclipse.persistence.internal.helper.DatabaseField getField()

INTERNAL: Returns the field which this mapping represents.

Overrides:

getField in class DatabaseMapping

getFieldName

public String getFieldName()

PUBLIC: Return the name of the field this mapping represents.

getJoinCriteria

public Expression getJoinCriteria(org.eclipse.persistence.internal.expressions.ObjectExpression context,
 Expression base)

INTERNAL: Join criteria is created to read target records (nested table) from the table.

Overrides:

getJoinCriteria in class ForeignReferenceMapping

hasConstraintDependency

public boolean hasConstraintDependency()

INTERNAL: The returns if the mapping has any constraint dependencies, such as foreign keys and join tables.

Overrides:

hasConstraintDependency in class ObjectReferenceMapping

initialize

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

INTERNAL: Initialize the mapping.

Overrides:

initialize in class ForeignReferenceMapping

Throws:

DescriptorException

isReferenceMapping

public boolean isReferenceMapping()

INTERNAL:

Overrides:

isReferenceMapping in class DatabaseMapping

preInsert

public void preInsert(WriteObjectQuery query)
               throws DatabaseException,
OptimisticLockException

INTERNAL: Insert privately owned parts

Overrides:

preInsert in class ObjectReferenceMapping

Throws:

DatabaseException

OptimisticLockException

preUpdate

public void preUpdate(WriteObjectQuery query)
               throws DatabaseException,
OptimisticLockException

INTERNAL: Update privately owned parts

Overrides:

preUpdate in class ObjectReferenceMapping

Throws:

DatabaseException

OptimisticLockException

postInsert

public void postInsert(WriteObjectQuery query)
                throws DatabaseException,
OptimisticLockException

INTERNAL: Insert privately owned parts

Overrides:

postInsert in class ObjectReferenceMapping

Throws:

DatabaseException

OptimisticLockException

postDelete

public void postDelete(DeleteObjectQuery query)
                throws DatabaseException,
OptimisticLockException

INTERNAL: Delete privately owned parts

Overrides:

postDelete in class ObjectReferenceMapping

Throws:

DatabaseException

OptimisticLockException

postUpdate

public void postUpdate(WriteObjectQuery query)
                throws DatabaseException,
OptimisticLockException

INTERNAL: Update privately owned parts

Overrides:

postUpdate in class ObjectReferenceMapping

Throws:

DatabaseException

OptimisticLockException

preDelete

public void preDelete(DeleteObjectQuery query)
               throws DatabaseException,
OptimisticLockException

INTERNAL: Delete privately owned parts

Overrides:

preDelete in class ObjectReferenceMapping

Throws:

DatabaseException

OptimisticLockException

setField

protected void setField(org.eclipse.persistence.internal.helper.DatabaseField field)

Set the field in the mapping.

setFieldName

public void setFieldName(String fieldName)

PUBLIC: Set the field name in the mapping.

setReferenceClass

public void setReferenceClass(Class referenceClass)

PUBLIC: This is a reference class whose instances this mapping will store in the domain objects.

Overrides:

setReferenceClass in class ForeignReferenceMapping

valueFromRow

public Object valueFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord row,
 org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
 ObjectBuildingQuery query,
 org.eclipse.persistence.internal.identitymaps.CacheKey cacheKey,
 org.eclipse.persistence.internal.sessions.AbstractSession executionSession,
 boolean isTargetProtected,
 Boolean[] wasCacheUsed)
                    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:

valueFromRow in class ForeignReferenceMapping

Throws:

DatabaseException

writeFromObjectIntoRow

public void writeFromObjectIntoRow(Object object,
 org.eclipse.persistence.internal.sessions.AbstractRecord record,
 org.eclipse.persistence.internal.sessions.AbstractSession session,
 DatabaseMapping.WriteType writeType)

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

Overrides:

writeFromObjectIntoRow in class DatabaseMapping

writeFromObjectIntoRowInternal

public void writeFromObjectIntoRowInternal(Object object,
 org.eclipse.persistence.internal.sessions.AbstractRecord record,
 org.eclipse.persistence.internal.sessions.AbstractSession session,
 boolean shouldIgnoreNull)

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

writeFromObjectIntoRowWithChangeRecord

public void writeFromObjectIntoRowWithChangeRecord(org.eclipse.persistence.internal.sessions.ChangeRecord changeRecord,
 org.eclipse.persistence.internal.sessions.AbstractRecord record,
 org.eclipse.persistence.internal.sessions.AbstractSession session,
 DatabaseMapping.WriteType writeType)

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

Overrides:

writeFromObjectIntoRowWithChangeRecord in class DatabaseMapping

writeFromObjectIntoRowForShallowInsert

public void writeFromObjectIntoRowForShallowInsert(Object object,
 org.eclipse.persistence.internal.sessions.AbstractRecord record,
 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

writeFromObjectIntoRowForUpdateAfterShallowInsert

public void writeFromObjectIntoRowForUpdateAfterShallowInsert(Object object,
 org.eclipse.persistence.internal.sessions.AbstractRecord record,
 org.eclipse.persistence.internal.sessions.AbstractSession session,
 org.eclipse.persistence.internal.helper.DatabaseTable table)

INTERNAL: This row is built for update after shallow insert which happens in case of bidirectional inserts. It contains the foreign keys with non null values that were set to null for shallow insert.

Overrides:

writeFromObjectIntoRowForUpdateAfterShallowInsert in class DatabaseMapping

writeFromObjectIntoRowForShallowInsertWithChangeRecord

public void writeFromObjectIntoRowForShallowInsertWithChangeRecord(org.eclipse.persistence.internal.sessions.ChangeRecord changeRecord,
 org.eclipse.persistence.internal.sessions.AbstractRecord record,
 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 record,
 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

isRelationalMapping

public boolean isRelationalMapping()

INTERNAL:

Overrides:

isRelationalMapping in class DatabaseMapping