Package com.sun.jdo.api.persistence.model.jdo

Interface RelationshipElement.Impl

All Superinterfaces:

PersistenceElement.Impl, PersistenceFieldElement.Impl, PersistenceMemberElement.Impl

All Known Implementing Classes:

RelationshipElementImpl

Enclosing class:

RelationshipElement

public static interface RelationshipElement.Impl
extends PersistenceFieldElement.Impl

Pluggable implementation of the storage of relationship element properties.

See Also:

• RelationshipElement(com.sun.jdo.api.persistence.model.jdo.RelationshipElement.Impl, com.sun.jdo.api.persistence.model.jdo.PersistenceClassElement)

Field Summary

Fields inherited from interface com.sun.jdo.api.persistence.model.jdo.PersistenceElement.Impl

ADD, REMOVE, SET

Method Summary

Modifier and Type	Method	Description
void	changeInverseRelationship(RelationshipElement inverseRelationship)	Changes the inverse relationship element for this relationship element.
String	getCollectionClass()	Get the collection class (for example Set, List, Vector, etc.) for this relationship element.
int	getDeleteAction()	Get the delete action for this relationship element.
String	getElementClass()	Get the element class for this relationship element.
String	getInverseRelationshipName()	Get the relative name of the inverse relationship field for this relationship element.
int	getLowerBound()	Get the lower cardinality bound for this relationship element.
int	getUpdateAction()	Get the update action for this relationship element.
int	getUpperBound()	Get the upper cardinality bound for this relationship element.
boolean	isPrefetch()	Determines whether this relationship element should prefetch or not.
void	setCollectionClass(String collectionClass)	Set the collection class for this relationship element.
void	setDeleteAction(int action)	Set the delete action for this relationship element.
void	setElementClass(String elementClass)	Set the element class for this relationship element.
void	setLowerBound(int lowerBound)	Set the lower cardinality bound for this relationship element.
void	setPrefetch(boolean flag)	Set whether this relationship element should prefetch or not.
void	setUpdateAction(int action)	Set the update action for this relationship element.
void	setUpperBound(int upperBound)	Set the upper cardinality bound for this relationship element.

Methods inherited from interface com.sun.jdo.api.persistence.model.jdo.PersistenceElement.Impl

addPropertyChangeListener, addVetoableChangeListener, attachToElement, getName, removePropertyChangeListener, removeVetoableChangeListener, setName

Methods inherited from interface com.sun.jdo.api.persistence.model.jdo.PersistenceFieldElement.Impl

getPersistenceType, isKey, isReadSensitive, isWriteSensitive, setKey, setPersistenceType, setReadSensitive, setWriteSensitive

Method Details

getUpdateAction

int getUpdateAction()

Get the update action for this relationship element.

Returns:

the update action, one of RelationshipElement.NONE_ACTION, RelationshipElement.NULLIFY_ACTION, RelationshipElement.RESTRICT_ACTION, RelationshipElement.CASCADE_ACTION, or RelationshipElement.AGGREGATE_ACTION

setUpdateAction

void setUpdateAction(int action)
              throws ModelException

Set the update action for this relationship element.

Parameters:

action - - an integer indicating the update action, one of: RelationshipElement.NONE_ACTION, RelationshipElement.NULLIFY_ACTION, RelationshipElement.RESTRICT_ACTION, RelationshipElement.CASCADE_ACTION, or RelationshipElement.AGGREGATE_ACTION

Throws:

ModelException - if impossible

getDeleteAction

int getDeleteAction()

Get the delete action for this relationship element.

Returns:

the delete action, one of RelationshipElement.NONE_ACTION, RelationshipElement.NULLIFY_ACTION, RelationshipElement.RESTRICT_ACTION, RelationshipElement.CASCADE_ACTION, or RelationshipElement.AGGREGATE_ACTION

setDeleteAction

void setDeleteAction(int action)
              throws ModelException

Set the delete action for this relationship element.

Parameters:

action - - an integer indicating the delete action, one of: RelationshipElement.NONE_ACTION, RelationshipElement.NULLIFY_ACTION, RelationshipElement.RESTRICT_ACTION, RelationshipElement.CASCADE_ACTION, or RelationshipElement.AGGREGATE_ACTION

Throws:

ModelException - if impossible

isPrefetch

boolean isPrefetch()

Determines whether this relationship element should prefetch or not.

Returns:

true if the relationship should prefetch, false otherwise

setPrefetch

void setPrefetch(boolean flag)
          throws ModelException

Set whether this relationship element should prefetch or not.

Parameters:

flag - - if true, the relationship is set to prefetch; otherwise, it is not

Throws:

ModelException - if impossible

getLowerBound

int getLowerBound()

Get the lower cardinality bound for this relationship element.

Returns:

the lower cardinality bound

setLowerBound

void setLowerBound(int lowerBound)
            throws ModelException

Set the lower cardinality bound for this relationship element.

Parameters:

lowerBound - - an integer indicating the lower cardinality bound

Throws:

ModelException - if impossible

getUpperBound

int getUpperBound()

Get the upper cardinality bound for this relationship element. Returns Integer.MAX_VALUE for n

Returns:

the upper cardinality bound

setUpperBound

void setUpperBound(int upperBound)
            throws ModelException

Set the upper cardinality bound for this relationship element.

Parameters:

upperBound - - an integer indicating the upper cardinality bound (use Integer.MAX_VALUE for n)

Throws:

ModelException - if impossible

getCollectionClass

String getCollectionClass()

Get the collection class (for example Set, List, Vector, etc.) for this relationship element.

Returns:

the collection class

setCollectionClass

void setCollectionClass(String collectionClass)
                 throws ModelException

Set the collection class for this relationship element.

Parameters:

collectionClass - - a string indicating the type of collection (for example Set, List, Vector, etc.)

Throws:

ModelException - if impossible

getElementClass

String getElementClass()

Get the element class for this relationship element. If primitive types are supported, you can use wrapperclass.TYPE.toString() to specify them.

Returns:

the element class

setElementClass

void setElementClass(String elementClass)
              throws ModelException

Set the element class for this relationship element.

Parameters:

elementClass - - a string indicating the type of elements in the collection. If primitive types are supported, you can use wrapperclass.TYPE.toString() to specify them.

Throws:

ModelException - if impossible

getInverseRelationshipName

String getInverseRelationshipName()

Get the relative name of the inverse relationship field for this relationship element. In the case of two-way relationships, the two relationship elements involved are inverses of each other. If this relationship element does not participate in a two-way relationship, this returns null. Note that it is possible to have this method return a value, but because of the combination of related class and lookup, there may be no corresponding RelationshipElement which can be found.

Returns:

the relative name of the inverse relationship element

See Also:

• RelationshipElement.getInverseRelationship(com.sun.jdo.api.persistence.model.Model)

changeInverseRelationship

void changeInverseRelationship(RelationshipElement inverseRelationship)
                        throws ModelException

Changes the inverse relationship element for this relationship element. This method is invoked for both sides from RelationshipElement.setInverseRelationship(com.sun.jdo.api.persistence.model.jdo.RelationshipElement, com.sun.jdo.api.persistence.model.Model) and should handle the vetoable change events, property change events, and setting the internal variable.

Parameters:

inverseRelationship - - a relationship element to be used as the inverse for this relationship element or null if this relationship element does not participate in a two-way relationship.

Throws:

ModelException - if impossible