org.eclipse.persistence.mappings
Class ManyToManyMapping

java.lang.Object
  org.eclipse.persistence.mappings.DatabaseMapping
      org.eclipse.persistence.mappings.ForeignReferenceMapping
          org.eclipse.persistence.mappings.CollectionMapping
              org.eclipse.persistence.mappings.ManyToManyMapping

All Implemented Interfaces:

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

public class ManyToManyMapping
extends CollectionMapping
implements RelationalMapping, MapComponentMapping

Purpose: Many to many mappings are used to represent the relationships between a collection of source objects and a collection of target objects. The mapping require the creation of an intermediate table for managing the associations between the source and target records.

See Also:

Serialized Form

Author:

Sati

Since:

TOPLink/Java 1.0

Field Summary

protected DataModifyQuery	deleteQuery Query used for single row deletion.
protected boolean	hasCustomDeleteQuery
protected boolean	hasCustomInsertQuery
protected HistoryPolicy	historyPolicy
protected DataModifyQuery	insertQuery Used for insertion.
protected static java.lang.String	ObjectAdded
protected static java.lang.String	ObjectRemoved
protected static java.lang.String	PostInsert Used for data modification events.
protected org.eclipse.persistence.internal.helper.DatabaseTable	relationTable The intermediate relation table.
protected java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField>	sourceKeyFields The field in the source table that corresponds to the key in the relation table
protected java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField>	sourceRelationKeyFields The field in the intermediate table that corresponds to the key in the source table
protected java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField>	targetKeyFields The field in the target table that corresponds to the key in the relation table
protected java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField>	targetRelationKeyFields The field in the intermediate table that corresponds to the key in the target table

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

containerPolicy, deleteAllQuery, hasCustomDeleteAllQuery, hasOrderBy

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, isLazy, isOptional, isPrimaryKeyMapping, isReadOnly, isRemotelyInitialized, NO_FIELDS, NO_WEIGHT, properties, weight, WEIGHT_1

Constructor Summary

ManyToManyMapping()
PUBLIC: Default constructor.

Method Summary

void	addSourceRelationKeyField(org.eclipse.persistence.internal.helper.DatabaseField sourceRelationKeyField, org.eclipse.persistence.internal.helper.DatabaseField sourcePrimaryKeyField) PUBLIC: Add the fields in the intermediate table that corresponds to the primary key in the source table.
void	addSourceRelationKeyFieldName(java.lang.String sourceRelationKeyFieldName, java.lang.String sourcePrimaryKeyFieldName) PUBLIC: Add the fields in the intermediate table that corresponds to the primary key in the source table.
void	addTargetRelationKeyField(org.eclipse.persistence.internal.helper.DatabaseField targetRelationKeyField, org.eclipse.persistence.internal.helper.DatabaseField targetPrimaryKeyField) PUBLIC: Add the fields in the intermediate table that corresponds to the primary key in the target table.
void	addTargetRelationKeyFieldName(java.lang.String targetRelationKeyFieldName, java.lang.String targetPrimaryKeyFieldName) PUBLIC: Add the fields in the intermediate table that corresponds to the primary key in the target table.
java.lang.Object	clone() INTERNAL: The mapping clones itself to create deep copy.
protected java.util.Vector	extractKeyFromRelationRow(org.eclipse.persistence.internal.sessions.AbstractRecord row, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Extract the source primary key value from the relation row.
protected java.util.Vector	extractPrimaryKeyFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord row, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Extract the primary key value from the source row.
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.
protected DataModifyQuery	getDeleteQuery()
HistoryPolicy	getHistoryPolicy() PUBLIC:
protected DataModifyQuery	getInsertQuery()
Expression	getJoinCriteria(org.eclipse.persistence.internal.expressions.QueryKeyExpression exp) INTERNAL: Returns the join criteria stored in the mapping selection query.
org.eclipse.persistence.internal.helper.DatabaseTable	getRelationTable() INTERNAL: Return the relation table associated with the mapping.
java.lang.String	getRelationTableName() PUBLIC: Return the relation table name associated with the mapping.
java.lang.String	getRelationTableQualifiedName() PUBLIC: Return the relation table qualified name associated with the mapping.
Expression	getSelectionCriteria() INTERNAL: Returns the selection criteria stored in the mapping selection query.
ReadQuery	getSelectionQuery() INTERNAL: Returns the read query assoicated with the mapping.
java.util.Vector	getSourceKeyFieldNames() PUBLIC: Return the source key field names associated with the mapping.
java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField>	getSourceKeyFields() INTERNAL: Return all the source key fields associated with the mapping.
java.util.Vector	getSourceRelationKeyFieldNames() PUBLIC: Return the source relation key field names associated with the mapping.
java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField>	getSourceRelationKeyFields() INTERNAL: Return all the source realtion key fields associated with the mapping.
java.util.Vector	getTargetKeyFieldNames() PUBLIC: Return the target key field names associated with the mapping.
java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField>	getTargetKeyFields() INTERNAL: Return all the target keys associated with the mapping.
java.util.Vector	getTargetRelationKeyFieldNames() PUBLIC: Return the target relation key field names associated with the mapping.
java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField>	getTargetRelationKeyFields() INTERNAL: Return all the target relation key fields associated with the mapping.
protected boolean	hasCustomDeleteQuery()
protected boolean	hasCustomInsertQuery()
boolean	hasDependency() INTERNAL: The join table is a dependency if not read-only.
void	initialize(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Initialize mappings
protected void	initializeDeleteAllQuery(org.eclipse.persistence.internal.sessions.AbstractSession session) Initialize delete all query.
protected void	initializeDeleteQuery(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Initialize delete query.
protected void	initializeInsertQuery(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Initialize insert query.
protected void	initializeRelationTable(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Set the table qualifier on the relation table if required
protected void	initializeSelectionCriteria(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Selection criteria is created to read target records from the table.
protected void	initializeSelectionCriteria(org.eclipse.persistence.internal.sessions.AbstractSession session, Expression startCriteria) INTERNAL: Selection criteria is created to read target records from the table.
protected void	initializeSourceKeys(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: All the source key field names are converted to DatabaseField and stored.
protected void	initializeSourceKeysWithDefaults(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: If a user does not specify the source key then the primary keys of the source table are used.
protected void	initializeSourceRelationKeys(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: All the source relation key field names are converted to DatabaseField and stored.
protected void	initializeTargetKeys(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: All the target key field names are converted to DatabaseField and stored.
protected void	initializeTargetKeysWithDefaults(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: If a user does not specify the target key then the primary keys of the target table are used.
protected void	initializeTargetRelationKeys(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: All the target relation key field names are converted to DatabaseField and stored.
protected void	insertAddedObjectEntry(ObjectLevelModifyQuery query, java.lang.Object objectAdded) INTERNAL: An object was added to the collection during an update, insert it.
void	insertIntoRelationTable(WriteObjectQuery query) INTERNAL: Insert into relation table.
void	insertTargetObjects(WriteObjectQuery query) INTERNAL: Write the target objects if the cascade policy requires them to be written first.
boolean	isJoiningSupported() INTERNAL: Return if this mapping support joining.
boolean	isManyToManyMapping() INTERNAL:
boolean	isRelationalMapping() INTERNAL:
protected boolean	isSingleSourceRelationKeySpecified() INTERNAL: Checks if a single source key was specified.
protected boolean	isSingleTargetRelationKeySpecified() INTERNAL: Checks if a single target key was specified.
protected void	objectAddedDuringUpdate(ObjectLevelModifyQuery query, java.lang.Object objectAdded, org.eclipse.persistence.internal.sessions.ObjectChangeSet changeSet) INTERNAL: An object was added to the collection during an update, insert it if private.
protected void	objectRemovedDuringUpdate(ObjectLevelModifyQuery query, java.lang.Object objectDeleted) INTERNAL: An object was removed to the collection during an update, delete it if private.
void	performDataModificationEvent(java.lang.Object[] event, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: Perform the commit event.
void	postInsert(WriteObjectQuery query) INTERNAL: Insert into relation table.
protected void	postPrepareNestedBatchQuery(ReadQuery batchQuery, ReadAllQuery query) INTERNAL: Add additional fields and check for history.
void	postUpdate(WriteObjectQuery query) INTERNAL: Update the relation table with the entries related to this mapping.
void	preDelete(DeleteObjectQuery query) INTERNAL: Delete entries related to this mapping from the relation table.
protected ReadQuery	prepareHistoricalQuery(ReadQuery targetQuery, ObjectBuildingQuery sourceQuery, org.eclipse.persistence.internal.sessions.AbstractSession executionSession) INTERNAL: Append the temporal selection to the query selection criteria.
protected void	prepareTranslationRow(org.eclipse.persistence.internal.sessions.AbstractRecord translationRow, java.lang.Object object, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: The translation row may require additional fields than the primary key if the mapping in not on the primary key.
void	setCustomDeleteQuery(DataModifyQuery query) PUBLIC: The default delete query for mapping can be overridden by specifying the new query.
void	setCustomInsertQuery(DataModifyQuery query) PUBLIC: The default insert query for mapping can be overridden by specifying the new query.
void	setDeleteCall(Call call) PUBLIC: Set the receiver's delete Call.
protected void	setDeleteQuery(DataModifyQuery deleteQuery)
void	setDeleteSQLString(java.lang.String sqlString) PUBLIC: Set the receiver's delete SQL string.
protected void	setHasCustomDeleteQuery(boolean hasCustomDeleteQuery)
protected void	setHasCustomInsertQuery(boolean bool)
void	setHistoryPolicy(HistoryPolicy policy) PUBLIC:
void	setInsertCall(Call call) PUBLIC: Set the receiver's insert Call.
protected void	setInsertQuery(DataModifyQuery insertQuery)
void	setInsertSQLString(java.lang.String sqlString) PUBLIC: Set the receiver's insert SQL string.
void	setRelationTable(org.eclipse.persistence.internal.helper.DatabaseTable relationTable) PUBLIC: Set the relational table.
void	setRelationTableName(java.lang.String tableName) PUBLIC: Set the name of the relational table.
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) PUBLIC: Set the source key field names associated with the mapping.
void	setSourceKeyFields(java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> sourceKeyFields) INTERNAL: Set the source fields.
void	setSourceRelationKeyFieldName(java.lang.String sourceRelationKeyFieldName) PUBLIC: Set the source key field in the relation table.
void	setSourceRelationKeyFieldNames(java.util.Vector fieldNames) PUBLIC: Set the source relation key field names associated with the mapping.
void	setSourceRelationKeyFields(java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> sourceRelationKeyFields) INTERNAL: Set the source fields.
void	setTargetKeyFieldNames(java.util.Vector fieldNames) INTERNAL: Set the target key field names associated with the mapping.
void	setTargetKeyFields(java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> targetKeyFields) INTERNAL: Set the target fields.
void	setTargetRelationKeyFieldName(java.lang.String targetRelationKeyFieldName) PUBLIC: Set the target key field in the relation table.
void	setTargetRelationKeyFieldNames(java.util.Vector fieldNames) INTERNAL: Set the target relation key field names associated with the mapping.
void	setTargetRelationKeyFields(java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> targetRelationKeyFields) INTERNAL: Set the target fields.

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

addAggregateOrderBy, addAscendingOrdering, addDescendingOrdering, addOrderBy, addToCollectionChangeRecord, buildBackupCloneForPartObject, buildChangeRecord, buildCloneForPartObject, buildCopy, buildElementClone, buildReferencesPKList, calculateDeferredChanges, cascadeDiscoverAndPersistUnregisteredNewObjects, cascadeMerge, cascadePerformRemoveIfRequired, cascadePerformRemovePrivateOwnedObjectFromChangeSetIfRequired, cascadeRegisterNewIfRequired, compareCollectionsForChange, compareForChange, compareObjects, compareObjectsAndWrite, compareObjectsWithoutPrivateOwned, compareObjectsWithPrivateOwned, convertClassNamesToClasses, fixRealObjectReferences, getContainerPolicy, getDeleteAllQuery, getObjectCorrespondingTo, getOrderByQueryKeyExpressions, getRealCollectionAttributeValueFromObject, hasCustomDeleteAllQuery, hasOrderBy, isAttributeValueInstantiatedOrChanged, isChangeTrackingSupported, isCollectionMapping, iterateOnElement, iterateOnRealAttributeValue, mergeChangesIntoObject, mergeIntoObject, mustDeleteReferenceObjectsOneByOne, objectUnchangedDuringUpdate, objectUnchangedDuringUpdate, readPrivateOwnedForObject, removeFromCollectionChangeRecord, replaceValueHoldersIn, setChangeListener, setContainerPolicy, setCustomDeleteAllQuery, setDeleteAllCall, setDeleteAllQuery, setDeleteAllSQLString, setHasCustomDeleteAllQuery, setSelectionQueryContainerPolicy, simpleAddToCollectionChangeRecord, simpleRemoveFromCollectionChangeRecord, updateChangeRecord, updateCollectionChangeRecord, useCollectionClass, useCollectionClassName, useListClassName, useMapClass, useMapClass, useMapClassName, useSortedSetClass, useSortedSetClassName, useSortedSetClassName, useTransparentCollection, useTransparentList, useTransparentMap, useTransparentSet, validateBeforeInitialization, valueFromPKList, valueFromRowInternalWithJoin, verifyDelete

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

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

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

buildExpression, buildObjectJoinExpression, buildObjectJoinExpression, buildShallowOriginalFromRow, cloneFields, collectFields, extractNestedExpressions, getAttributeAccessor, getAttributeClassification, getAttributeName, getDescriptor, getField, getFieldClassification, getFields, getGetMethodName, getProperties, getProperty, getRealAttributeValueFromObject, getSelectFields, getSelectTables, getSetMethodName, getWeight, hasConstraintDependency, hasInverseConstraintDependency, hasRootExpressionThatShouldUseOuterJoin, isAbstractCompositeCollectionMapping, isAbstractCompositeDirectCollectionMapping, isAbstractCompositeObjectMapping, isAbstractDirectMapping, isAggregateCollectionMapping, isAggregateMapping, isAggregateObjectMapping, isCandidateForPrivateOwnedRemoval, isCascadedLockingSupported, isCloningRequired, isDatabaseMapping, isDirectCollectionMapping, isDirectMapMapping, isDirectToFieldMapping, isDirectToXMLTypeMapping, isEISMapping, isNestedTableMapping, isObjectReferenceMapping, isOneToManyMapping, isOneToOneMapping, isOptional, isPrimaryKeyMapping, isReadOnly, isReferenceMapping, isRemotelyInitialized, isStructureMapping, isTransformationMapping, isUnidirectionalOneToManyMapping, isUsingMethodAccess, isVariableOneToOneMapping, isWriteOnly, isXMLMapping, postCalculateChanges, postCalculateChangesOnDeleted, postDelete, postInitialize, preInsert, prepareCascadeLockingPolicy, preUpdate, readFromResultSetIntoObject, readFromRowIntoObject, readOnly, readWrite, rehashFieldDependancies, remotelyInitialized, setAttributeAccessor, setAttributeName, setAttributeValueInObject, setDescriptor, setFields, setGetMethodName, setIsLazy, setIsOptional, setIsPrimaryKeyMapping, setIsReadOnly, setProperties, setProperty, setSetMethodName, setWeight, toString, validateAfterInitialization, valueFromObject, valueFromResultSet, valueFromRow, writeFromAttributeIntoRow, writeFromObjectIntoRow, writeFromObjectIntoRowForShallowInsert, writeFromObjectIntoRowForShallowInsertWithChangeRecord, writeFromObjectIntoRowForUpdate, writeFromObjectIntoRowForWhereClause, writeFromObjectIntoRowWithChangeRecord, writeInsertFieldsIntoRow, writeUpdateFieldsIntoRow

Methods inherited from class java.lang.Object

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

Field Detail

PostInsert

protected static final java.lang.String PostInsert

Used for data modification events.

See Also:

Constant Field Values

ObjectRemoved

protected static final java.lang.String ObjectRemoved

See Also:

Constant Field Values

ObjectAdded

protected static final java.lang.String ObjectAdded

See Also:

Constant Field Values

relationTable

protected transient org.eclipse.persistence.internal.helper.DatabaseTable relationTable

The intermediate relation table.

sourceKeyFields

protected transient java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> sourceKeyFields

The field in the source table that corresponds to the key in the relation table

targetKeyFields

protected transient java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> targetKeyFields

The field in the target table that corresponds to the key in the relation table

sourceRelationKeyFields

protected transient java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> sourceRelationKeyFields

The field in the intermediate table that corresponds to the key in the source table

targetRelationKeyFields

protected transient java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> targetRelationKeyFields

The field in the intermediate table that corresponds to the key in the target table

deleteQuery

protected transient DataModifyQuery deleteQuery

Query used for single row deletion.

hasCustomDeleteQuery

protected transient boolean hasCustomDeleteQuery

insertQuery

protected transient DataModifyQuery insertQuery

Used for insertion.

hasCustomInsertQuery

protected transient boolean hasCustomInsertQuery

historyPolicy

protected HistoryPolicy historyPolicy

Constructor Detail

ManyToManyMapping

public ManyToManyMapping()

PUBLIC: Default constructor.

Method Detail

isRelationalMapping

public boolean isRelationalMapping()

INTERNAL:

Overrides:

isRelationalMapping in class DatabaseMapping

addSourceRelationKeyField

public void addSourceRelationKeyField(org.eclipse.persistence.internal.helper.DatabaseField sourceRelationKeyField,
                                      org.eclipse.persistence.internal.helper.DatabaseField sourcePrimaryKeyField)

PUBLIC: Add the fields in the intermediate table that corresponds to the primary key in the source table. This method is used if the keys are composite.

addSourceRelationKeyFieldName

public void addSourceRelationKeyFieldName(java.lang.String sourceRelationKeyFieldName,
                                          java.lang.String sourcePrimaryKeyFieldName)

PUBLIC: Add the fields in the intermediate table that corresponds to the primary key in the source table. This method is used if the keys are composite.

addTargetRelationKeyField

public void addTargetRelationKeyField(org.eclipse.persistence.internal.helper.DatabaseField targetRelationKeyField,
                                      org.eclipse.persistence.internal.helper.DatabaseField targetPrimaryKeyField)

PUBLIC: Add the fields in the intermediate table that corresponds to the primary key in the target table. This method is used if the keys are composite.

addTargetRelationKeyFieldName

public void addTargetRelationKeyFieldName(java.lang.String targetRelationKeyFieldName,
                                          java.lang.String targetPrimaryKeyFieldName)

PUBLIC: Add the fields in the intermediate table that corresponds to the primary key in the target table. This method is used if the keys are composite.

clone

public java.lang.Object clone()

INTERNAL: The mapping clones itself to create deep copy.

Overrides:

clone in class CollectionMapping

extractKeyFromRelationRow

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

INTERNAL: Extract the source primary key value from the relation row. Used for batch reading, most following same order and fields as in the mapping.

extractPrimaryKeyFromRow

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

INTERNAL: Extract the primary key value from the source row. Used for batch reading, most following same order and fields as in the mapping.

postPrepareNestedBatchQuery

protected void postPrepareNestedBatchQuery(ReadQuery batchQuery,
                                           ReadAllQuery query)

INTERNAL: Add additional fields and check for history.

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

getDeleteQuery

protected DataModifyQuery getDeleteQuery()

getInsertQuery

protected DataModifyQuery getInsertQuery()

getJoinCriteria

public Expression getJoinCriteria(org.eclipse.persistence.internal.expressions.QueryKeyExpression exp)

INTERNAL: Returns the join criteria stored in the mapping selection query. This criteria is used to read reference objects across the tables from the database.

Overrides:

getJoinCriteria in class ForeignReferenceMapping

getHistoryPolicy

public HistoryPolicy getHistoryPolicy()

PUBLIC:

getRelationTable

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

INTERNAL: Return the relation table associated with the mapping.

getRelationTableName

public java.lang.String getRelationTableName()

PUBLIC: Return the relation table name associated with the mapping.

getRelationTableQualifiedName

public java.lang.String getRelationTableQualifiedName()

PUBLIC: Return the relation table qualified name associated with the mapping.

getSelectionCriteria

public Expression getSelectionCriteria()

INTERNAL: Returns the selection criteria stored in the mapping selection query. This criteria is used to read reference objects from the database.

Overrides:

getSelectionCriteria in class ForeignReferenceMapping

See Also:

OneToOneMapping.buildSelectionCriteria(), OneToManyMapping.buildSelectionCriteria()

getSelectionQuery

public ReadQuery getSelectionQuery()

INTERNAL: Returns the read query assoicated with the mapping.

Overrides:

getSelectionQuery 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 sourceRelationKeyFieldNames.

getSourceKeyFields

public java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> getSourceKeyFields()

INTERNAL: Return all the source key fields associated with the mapping.

getSourceRelationKeyFieldNames

public java.util.Vector getSourceRelationKeyFieldNames()

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

getSourceRelationKeyFields

public java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> getSourceRelationKeyFields()

INTERNAL: Return all the source realtion key fields associated with the mapping.

getTargetKeyFieldNames

public java.util.Vector getTargetKeyFieldNames()

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

getTargetKeyFields

public java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> getTargetKeyFields()

INTERNAL: Return all the target keys associated with the mapping.

getTargetRelationKeyFieldNames

public java.util.Vector getTargetRelationKeyFieldNames()

PUBLIC: Return the target relation key field names associated with the mapping. These are in-order with the targetKeyFieldNames.

getTargetRelationKeyFields

public java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> getTargetRelationKeyFields()

INTERNAL: Return all the target relation key fields associated with the mapping.

hasCustomDeleteQuery

protected boolean hasCustomDeleteQuery()

hasCustomInsertQuery

protected boolean hasCustomInsertQuery()

hasDependency

public boolean hasDependency()

INTERNAL: The join table is a dependency if not read-only.

Overrides:

hasDependency in class DatabaseMapping

initialize

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

INTERNAL: Initialize mappings

Overrides:

initialize in class CollectionMapping

Throws:

DescriptorException

initializeDeleteAllQuery

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

Initialize delete all query. This query is used to all relevant rows from the relation table.

initializeDeleteQuery

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

INTERNAL: Initialize delete query. This query is used to delete a specific row from the join table in uow, given the objects on both sides of the relation.

initializeInsertQuery

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

INTERNAL: Initialize insert query. This query is used to insert the collection of objects into the relation table.

initializeRelationTable

protected void initializeRelationTable(org.eclipse.persistence.internal.sessions.AbstractSession session)
                                throws DescriptorException

INTERNAL: Set the table qualifier on the relation table if required

Throws:

DescriptorException

initializeSelectionCriteria

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

INTERNAL: Selection criteria is created to read target records from the table.

initializeSelectionCriteria

protected void initializeSelectionCriteria(org.eclipse.persistence.internal.sessions.AbstractSession session,
                                           Expression startCriteria)

INTERNAL: Selection criteria is created to read target records from the table.

initializeSourceKeys

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

INTERNAL: All the source key field names are converted to DatabaseField and stored.

initializeSourceKeysWithDefaults

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

INTERNAL: If a user does not specify the source key then the primary keys of the source table are used.

initializeSourceRelationKeys

protected void initializeSourceRelationKeys(org.eclipse.persistence.internal.sessions.AbstractSession session)
                                     throws DescriptorException

INTERNAL: All the source relation key field names are converted to DatabaseField and stored.

Throws:

DescriptorException

initializeTargetKeys

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

INTERNAL: All the target key field names are converted to DatabaseField and stored.

initializeTargetKeysWithDefaults

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

INTERNAL: If a user does not specify the target key then the primary keys of the target table are used.

initializeTargetRelationKeys

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

INTERNAL: All the target relation key field names are converted to DatabaseField and stored.

insertAddedObjectEntry

protected void insertAddedObjectEntry(ObjectLevelModifyQuery query,
                                      java.lang.Object objectAdded)
                               throws DatabaseException,
                                      OptimisticLockException

INTERNAL: An object was added to the collection during an update, insert it.

Throws:

DatabaseException

OptimisticLockException

insertIntoRelationTable

public void insertIntoRelationTable(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.

- Repeat above three statements until all the target objects are done.

Throws:

DatabaseException

insertTargetObjects

public void insertTargetObjects(WriteObjectQuery query)
                         throws DatabaseException,
                                OptimisticLockException

INTERNAL: Write the target objects if the cascade policy requires them to be written first. They must be written within a unit of work to ensure that they exist.

Throws:

DatabaseException

OptimisticLockException

isJoiningSupported

public boolean isJoiningSupported()

INTERNAL: Return if this mapping support joining.

Overrides:

isJoiningSupported in class ForeignReferenceMapping

isManyToManyMapping

public boolean isManyToManyMapping()

INTERNAL:

Overrides:

isManyToManyMapping in class DatabaseMapping

isSingleSourceRelationKeySpecified

protected boolean isSingleSourceRelationKeySpecified()

INTERNAL: Checks if a single source key was specified.

isSingleTargetRelationKeySpecified

protected boolean isSingleTargetRelationKeySpecified()

INTERNAL: Checks if a single target key was specified.

objectAddedDuringUpdate

protected void objectAddedDuringUpdate(ObjectLevelModifyQuery query,
                                       java.lang.Object objectAdded,
                                       org.eclipse.persistence.internal.sessions.ObjectChangeSet changeSet)
                                throws DatabaseException,
                                       OptimisticLockException

INTERNAL: An object was added to the collection during an update, insert it if private.

Overrides:

objectAddedDuringUpdate in class CollectionMapping

Throws:

DatabaseException

OptimisticLockException

objectRemovedDuringUpdate

protected void objectRemovedDuringUpdate(ObjectLevelModifyQuery query,
                                         java.lang.Object objectDeleted)
                                  throws DatabaseException,
                                         OptimisticLockException

INTERNAL: An object was removed to the collection during an update, delete it if private.

Overrides:

objectRemovedDuringUpdate in class CollectionMapping

Throws:

DatabaseException

OptimisticLockException

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

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.

- Repeat above three statements until all the target objects are done.

Overrides:

postInsert in class DatabaseMapping

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 DatabaseMapping

Throws:

DatabaseException

preDelete

public void preDelete(DeleteObjectQuery query)
               throws DatabaseException

INTERNAL: Delete entries related to this mapping from the relation table.

Overrides:

preDelete in class DatabaseMapping

Throws:

DatabaseException

prepareTranslationRow

protected void prepareTranslationRow(org.eclipse.persistence.internal.sessions.AbstractRecord translationRow,
                                     java.lang.Object object,
                                     org.eclipse.persistence.internal.sessions.AbstractSession session)

INTERNAL: The translation row may require additional fields than the primary key if the mapping in not on the primary key.

Overrides:

prepareTranslationRow in class CollectionMapping

setCustomDeleteQuery

public void setCustomDeleteQuery(DataModifyQuery query)

PUBLIC: The default delete query for mapping can be overridden by specifying the new query. This query must delete the row from the M-M join table.

setCustomInsertQuery

public void setCustomInsertQuery(DataModifyQuery query)

PUBLIC: The default insert query for mapping can be overridden by specifying the new query. This query must insert the row into the M-M join table.

setDeleteQuery

protected void setDeleteQuery(DataModifyQuery deleteQuery)

setDeleteSQLString

public void setDeleteSQLString(java.lang.String sqlString)

PUBLIC: Set the receiver's delete SQL string. This allows the user to override the SQL generated by TOPLink, with there own SQL or procedure call. The arguments are translated from the fields of the source row, through replacing the field names marked by '#' with the values for those fields. This is used to delete a single entry from the M-M join table. Example, 'delete from PROJ_EMP where PROJ_ID = #PROJ_ID AND EMP_ID = #EMP_ID'.

setDeleteCall

public void setDeleteCall(Call call)

PUBLIC: Set the receiver's delete Call. This allows the user to override the SQL generated by TOPLink, with there own SQL or procedure call. The arguments are translated from the fields of the source row. This is used to delete a single entry from the M-M join table. Example, 'new SQLCall("delete from PROJ_EMP where PROJ_ID = #PROJ_ID AND EMP_ID = #EMP_ID")'.

setHasCustomDeleteQuery

protected void setHasCustomDeleteQuery(boolean hasCustomDeleteQuery)

setHasCustomInsertQuery

protected void setHasCustomInsertQuery(boolean bool)

setInsertQuery

protected void setInsertQuery(DataModifyQuery insertQuery)

setInsertSQLString

public void setInsertSQLString(java.lang.String sqlString)

PUBLIC: Set the receiver's insert SQL string. This allows the user to override the SQL generated by TOPLink, with there own SQL or procedure call. The arguments are translated from the fields of the source row, through replacing the field names marked by '#' with the values for those fields. This is used to insert an entry into the M-M join table. Example, 'insert into PROJ_EMP (EMP_ID, PROJ_ID) values (#EMP_ID, #PROJ_ID)'.

setInsertCall

public void setInsertCall(Call call)

PUBLIC: Set the receiver's insert Call. This allows the user to override the SQL generated by TOPLink, with there own SQL or procedure call. The arguments are translated from the fields of the source row. This is used to insert an entry into the M-M join table. Example, 'new SQLCall("insert into PROJ_EMP (EMP_ID, PROJ_ID) values (#EMP_ID, #PROJ_ID)")'.

setRelationTable

public void setRelationTable(org.eclipse.persistence.internal.helper.DatabaseTable relationTable)

PUBLIC: Set the relational table. This is the join table that store both the source and target primary keys.

setHistoryPolicy

public void setHistoryPolicy(HistoryPolicy policy)

PUBLIC:

setRelationTableName

public void setRelationTableName(java.lang.String tableName)

PUBLIC: Set the name of the relational table. This is the join table that store both the source and target primary keys.

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)

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

setSourceKeyFields

public void setSourceKeyFields(java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> sourceKeyFields)

INTERNAL: Set the source fields.

setSourceRelationKeyFieldName

public void setSourceRelationKeyFieldName(java.lang.String sourceRelationKeyFieldName)

PUBLIC: Set the source key field in the relation table. This is the name of the foreign key in the relation table to the source's primary key field. This method is used if the source primary key is a singleton only.

setSourceRelationKeyFieldNames

public void setSourceRelationKeyFieldNames(java.util.Vector fieldNames)

PUBLIC: Set the source relation key field names associated with the mapping. These must be in-order with the sourceKeyFieldNames.

setSourceRelationKeyFields

public void setSourceRelationKeyFields(java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> sourceRelationKeyFields)

INTERNAL: Set the source fields.

setTargetKeyFieldNames

public void setTargetKeyFieldNames(java.util.Vector fieldNames)

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

setTargetKeyFields

public void setTargetKeyFields(java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> targetKeyFields)

INTERNAL: Set the target fields.

setTargetRelationKeyFieldName

public void setTargetRelationKeyFieldName(java.lang.String targetRelationKeyFieldName)

PUBLIC: Set the target key field in the relation table. This is the name of the foreign key in the relation table to the target's primary key field. This method is used if the target's primary key is a singleton only.

setTargetRelationKeyFieldNames

public void setTargetRelationKeyFieldNames(java.util.Vector fieldNames)

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

setTargetRelationKeyFields

public void setTargetRelationKeyFields(java.util.Vector<org.eclipse.persistence.internal.helper.DatabaseField> targetRelationKeyFields)

INTERNAL: Set the target fields.

prepareHistoricalQuery

protected ReadQuery prepareHistoricalQuery(ReadQuery targetQuery,
                                           ObjectBuildingQuery sourceQuery,
                                           org.eclipse.persistence.internal.sessions.AbstractSession executionSession)

INTERNAL: Append the temporal selection to the query selection criteria.

Overrides:

prepareHistoricalQuery in class ForeignReferenceMapping