org.eclipse.persistence.mappings
Class ManyToManyMapping

java.lang.Object
  extended by org.eclipse.persistence.mappings.DatabaseMapping
      extended by org.eclipse.persistence.mappings.ForeignReferenceMapping
          extended by org.eclipse.persistence.mappings.CollectionMapping
              extended by 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 requires the creation of an intermediate table for managing the associations between the source and target records.

Since:
TOPLink/Java 1.0
Author:
Sati
See Also:
Serialized Form

Nested Class Summary
 
Nested classes/interfaces inherited from class org.eclipse.persistence.mappings.DatabaseMapping
DatabaseMapping.WriteType
 
Field Summary
 
Fields inherited from class org.eclipse.persistence.mappings.ForeignReferenceMapping
INNER_JOIN, NONE, OUTER_JOIN
 
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.
 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.
 void earlyPreDelete(DeleteObjectQuery query)
          INTERNAL: This method is called to update collection tables prior to commit.
 void extendPessimisticLockScopeInSourceQuery(ObjectLevelReadQuery sourceQuery)
          INTERNAL: Called only if both shouldExtendPessimisticLockScope and shouldExtendPessimisticLockScopeInSourceQuery are true.
 HistoryPolicy getHistoryPolicy()
          PUBLIC:
 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.
 RelationTableMechanism getRelationTableMechanism()
          PUBLIC: Returns RelationTableMechanism that may be owned by 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 relation 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.
 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
 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 isDefinedAsOneToManyMapping()
          INTERNAL: Return whether this mapping was originally defined as a OneToMany
 boolean isJoiningSupported()
          INTERNAL: Return if this mapping support joining.
 boolean isManyToManyMapping()
          INTERNAL:
 boolean isOwned()
          INTERNAL:
 boolean isRelationalMapping()
          INTERNAL:
 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.
 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.
 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 setDefinedAsOneToManyMapping(boolean isDefinedAsOneToManyMapping)
          INTERNAL: Set whether this mapping was originally defined as a OneToMany
 void setDeleteCall(Call call)
          PUBLIC: Set the receiver's delete Call.
 void setDeleteSQLString(java.lang.String sqlString)
          PUBLIC: Set the receiver's delete SQL string.
 void setHistoryPolicy(HistoryPolicy policy)
          PUBLIC:
 void setInsertCall(Call call)
          PUBLIC: Set the receiver's insert Call.
 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.
 boolean shouldUseListOrderFieldTableExpression()
          INTERNAL: Indicates whether getListOrderFieldExpression method should create field expression on table expression.
 
Methods inherited from class org.eclipse.persistence.mappings.CollectionMapping
addAggregateOrderBy, addAscendingOrdering, addDescendingOrdering, addOrderBy, buildBackupCloneForPartObject, buildChangeRecord, buildCloneForPartObject, buildCopy, buildElementClone, buildReferencesPKList, calculateDeferredChanges, cascadeDiscoverAndPersistUnregisteredNewObjects, cascadeMerge, cascadePerformRemoveIfRequired, cascadePerformRemovePrivateOwnedObjectFromChangeSetIfRequired, cascadeRegisterNewIfRequired, compareCollectionsForChange, compareForChange, compareObjects, convertClassNamesToClasses, extractResultFromBatchQuery, fixRealObjectReferences, getContainerPolicy, getListOrderField, getListOrderFieldExpression, getObjectCorrespondingTo, getOrderByQueryKeyExpressions, getOrderCorrectionType, getRealCollectionAttributeValueFromObject, getTargetPrimaryKeyFields, hasOrderBy, isAttributeValueInstantiatedOrChanged, isChangeTrackingSupported, isCollectionMapping, isListOrderFieldSupported, iterateOnElement, iterateOnRealAttributeValue, mergeChangesIntoObject, mergeIntoObject, postCalculateChanges, postDelete, postInitialize, preInsert, prepareNestedBatchQuery, preUpdate, recordPrivateOwnedRemovals, replaceValueHoldersIn, setChangeListener, setContainerPolicy, setCustomDeleteAllQuery, setDeleteAllCall, setDeleteAllSQLString, setListOrderField, setListOrderFieldName, setOrderCorrectionType, simpleAddToCollectionChangeRecord, simpleRemoveFromCollectionChangeRecord, updateChangeRecord, updateCollectionChangeRecord, useCollectionClass, useCollectionClassName, useListClassName, useMapClass, useMapClass, useMapClassName, useSortedSetClass, useSortedSetClassName, useSortedSetClassName, useTransparentCollection, useTransparentList, useTransparentMap, useTransparentSet, validateBeforeInitialization, valueFromPKList, verifyDelete
 
Methods inherited from class org.eclipse.persistence.mappings.ForeignReferenceMapping
buildBackupClone, buildClone, buildCloneFromRow, createUnitOfWorkValueHolder, dontUseBatchReading, dontUseIndirection, fixObjectReferences, getAttributeValueFromObject, getAttributeValueWithClonedValueHolders, getIndirectionPolicy, getJoinFetch, getRealAttributeValueFromAttribute, getReferenceClass, getReferenceClassName, getReferenceDescriptor, getRelationshipPartner, getRelationshipPartnerAttributeName, getValueFromRemoteValueHolder, hasCustomSelectionQuery, instantiateAttribute, isAttributeValueInstantiated, isCascadeDetach, isCascadeMerge, isCascadePersist, isCascadeRefresh, isCascadeRemove, isForeignReferenceMapping, isInnerJoinFetched, isJoinFetched, isLazy, isLockableMapping, isOuterJoinFetched, isPrivateOwned, iterate, mergeRemoteValueHolder, preInitialize, prepareNestedJoins, privateOwnedRelationship, remoteInitialization, requiresTransientWeavedFields, setCascadeAll, setCascadeDetach, setCascadeMerge, setCascadePersist, setCascadeRefresh, setCascadeRemove, setCustomSelectionQuery, setForceInitializationOfSelectionCriteria, setIndirectionPolicy, setIsPrivateOwned, setJoinFetch, setRealAttributeValueInObject, setReferenceClass, setReferenceClassName, setRelationshipPartner, setRelationshipPartnerAttributeName, setRequiresTransientWeavedFields, setSelectionCall, setSelectionCriteria, setSelectionSQLString, setShouldExtendPessimisticLockScope, setUsesBatchReading, setUsesIndirection, shouldExtendPessimisticLockScope, shouldExtendPessimisticLockScopeInDedicatedQuery, shouldExtendPessimisticLockScopeInSourceQuery, shouldExtendPessimisticLockScopeInTargetQuery, shouldMergeCascadeParts, shouldUseBatchReading, trimRowForJoin, trimRowForJoin, useBasicIndirection, useBatchReading, useContainerIndirection, useInnerJoinFetch, useOuterJoinFetch, usesIndirection, useWeavedIndirection, valueFromRow
 
Methods inherited from class org.eclipse.persistence.mappings.DatabaseMapping
buildExpression, buildObjectJoinExpression, buildObjectJoinExpression, buildShallowOriginalFromRow, derivesId, getAttributeAccessor, getAttributeClassification, getAttributeName, getDerivedIdMapping, getDescriptor, getField, getFieldClassification, getFields, getGetMethodName, getMapsIdValue, getProperties, getProperty, getRealAttributeValueFromObject, getSelectFields, getSelectTables, getSetMethodName, getWeight, hasConstraintDependency, hasInverseConstraintDependency, hasMapsIdValue, isAbstractCompositeCollectionMapping, isAbstractCompositeDirectCollectionMapping, isAbstractCompositeObjectMapping, isAbstractDirectMapping, isAggregateCollectionMapping, isAggregateMapping, isAggregateObjectMapping, isCandidateForPrivateOwnedRemoval, isCascadedLockingSupported, isCloningRequired, isDatabaseMapping, isDirectCollectionMapping, isDirectMapMapping, isDirectToFieldMapping, isDirectToXMLTypeMapping, isEISMapping, isJPAId, isMapKeyMapping, isNestedTableMapping, isObjectReferenceMapping, isOneToManyMapping, isOneToOneMapping, isOptional, isPrimaryKeyMapping, isReadOnly, isReferenceMapping, isStructureMapping, isTransformationMapping, isUnidirectionalOneToManyMapping, isUsingMethodAccess, isVariableOneToOneMapping, isWriteOnly, isXMLMapping, postCalculateChangesOnDeleted, prepareCascadeLockingPolicy, readFromResultSetIntoObject, readFromRowIntoObject, readOnly, readWrite, rehashFieldDependancies, setAttributeAccessor, setAttributeName, setAttributeValueInObject, setDerivedIdMapping, setDerivesId, setDescriptor, setGetMethodName, setIsJPAId, setIsLazy, setIsMapKeyMapping, setIsOptional, setIsPrimaryKeyMapping, setIsReadOnly, setMapsIdValue, 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, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

ManyToManyMapping

public ManyToManyMapping()
PUBLIC: Default constructor.

Method Detail

isOwned

public boolean isOwned()
INTERNAL:

Overrides:
isOwned in class DatabaseMapping

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

earlyPreDelete

public void earlyPreDelete(DeleteObjectQuery query)
INTERNAL: This method is called to update collection tables prior to commit.

Overrides:
earlyPreDelete in class DatabaseMapping

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

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

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 CollectionMapping

getHistoryPolicy

public HistoryPolicy getHistoryPolicy()
PUBLIC:


getRelationTableMechanism

public RelationTableMechanism getRelationTableMechanism()
PUBLIC: Returns RelationTableMechanism that may be owned by the mapping. Note that all RelationTableMechanism methods are accessible through the mapping directly. The only reason this method is provided is to allow a uniform approach to RelationTableMechanism in both ManyToManyMapping and OneToOneMapping that uses RelationTableMechanism.


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 relation 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.


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

shouldUseListOrderFieldTableExpression

public boolean shouldUseListOrderFieldTableExpression()
INTERNAL: Indicates whether getListOrderFieldExpression method should create field expression on table expression.

Overrides:
shouldUseListOrderFieldTableExpression in class CollectionMapping

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

isDefinedAsOneToManyMapping

public boolean isDefinedAsOneToManyMapping()
INTERNAL: Return whether this mapping was originally defined as a OneToMany

Returns:

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

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 CollectionMapping
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

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.


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'.


setDefinedAsOneToManyMapping

public void setDefinedAsOneToManyMapping(boolean isDefinedAsOneToManyMapping)
INTERNAL: Set whether this mapping was originally defined as a OneToMany

Parameters:
isDefinedAsOneToManyMapping -

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")'.


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.