Package org.gcube.informationsystem.model.reference.properties

Interface PropagationConstraint

All Superinterfaces:

Element, PropertyElement, Serializable

All Known Implementing Classes:

PropagationConstraintImpl

@TypeMetadata(name="PropagationConstraint",
              description="This type provides propagation constraint for **Relation** instances.\n\n- **`add`**:\n  - `propagate`: Adding the source **Resource** instance (or the **Relation** instance itself) to Context C recursively adds the target **Entity** instance to C.\n  - `unpropagate`: Adding the source **Resource** instance (or the **Relation** instance itself) to Context C does NOT add the target **Entity** instance to C.\n- **`remove`**:\n  - `cascade`: Removing the source **Resource** instance (or the **Relation** instance itself) from Context C recursively removes the target **Entity** instance from C.\n  - `cascadeWhenOrphan`: (Available for IsRelatedTo only) Removing the source **Resource** instance (or the IsRelatedTo instance itself) from Context C removes the target **Resource** instance from C only if the target **Resource** instance has no other incoming IsRelatedTo instances in Context C.\n  - `keep`: Removing the source **Resource** instance (or the **Relation** instance itself) from Context C does NOT remove the target **Entity** instance from C.",
              version="2.0.0")
@Change(version="2.0.0",description="Removed \'delete\' propagation constraint") @Change(version="1.1.0",description="Added \'delete\' propagation constraint") @Change(version="1.0.0",description="First Version")
public interface PropagationConstraint
extends PropertyElement

Defines the propagation behavior for a relation when an 'add to context' or 'remove from context' event occurs on the source entity or the relation itself. The getRemoveConstraint() value also governs whether the target entity is cascade-deleted when the source entity or the relation itself is deleted outright, not merely removed from one context — there is no separate constraint for that scenario.

The default propagation constraints are:

• IsRelatedTo: add=unpropagate, remove=keep
• ConsistsOf: add=propagate, remove=cascade

Author:

Luca Frosini (ISTI - CNR)

See Also:

• PropertyElement

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static enum	PropagationConstraint.AddConstraint	Defines the behavior for an 'add' operation.
static enum	PropagationConstraint.RemoveConstraint	Defines the behavior for a 'remove' from context operation.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ADD_PROPERTY	The property name for the 'add' constraint.
static final String	NAME	The name of the PropagationConstraint property type.
static final String	REMOVE_PROPERTY	The property name for the 'remove' constraint.

Fields inherited from interface org.gcube.informationsystem.base.reference.Element

DATETIME_PATTERN, REDACTED, TYPE_PROPERTY, UNKNOWN_USER

Method Summary

Modifier and Type	Method	Description
PropagationConstraint.AddConstraint	getAddConstraint()	Returns the propagation constraint for the 'add' operation.
PropagationConstraint.RemoveConstraint	getRemoveConstraint()	Returns the propagation constraint for the 'remove' operation.
void	setAddConstraint(PropagationConstraint.AddConstraint addConstraint)	Sets the propagation constraint for the 'add' operation.
void	setRemoveConstraint(PropagationConstraint.RemoveConstraint removeConstraint)	Sets the propagation constraint for the 'remove' operation.

Methods inherited from interface org.gcube.informationsystem.base.reference.Element

getTypeName

Field Details

NAME

static final String NAME

The name of the PropagationConstraint property type.

See Also:

• Constant Field Values

ADD_PROPERTY

static final String ADD_PROPERTY

The property name for the 'add' constraint.

See Also:

• Constant Field Values

REMOVE_PROPERTY

static final String REMOVE_PROPERTY

The property name for the 'remove' constraint.

See Also:

• Constant Field Values

Method Details

getAddConstraint

@ISProperty(name="add",
            description="It indicates the behavior to implement for the target **Entity** instance when an \'add\' action is performed on the source **Resource** instance (or the **Relation** instance itself). *(Defaults: IsRelatedTo=\'unpropagate\', ConsistsOf=\'propagate\').*",
            mandatory=true)
PropagationConstraint.AddConstraint getAddConstraint()

Returns the propagation constraint for the 'add' operation.

Returns:

The PropagationConstraint.AddConstraint.

setAddConstraint

void setAddConstraint(PropagationConstraint.AddConstraint addConstraint)

Sets the propagation constraint for the 'add' operation.

Parameters:

addConstraint - The PropagationConstraint.AddConstraint to set.

getRemoveConstraint

@ISProperty(name="remove",
            description="It indicates the behavior to implement for the target **Entity** instance when a \'remove\' action is performed. *(Defaults: IsRelatedTo=\'keep\', ConsistsOf=\'cascade\').*",
            mandatory=true)
PropagationConstraint.RemoveConstraint getRemoveConstraint()

Returns the propagation constraint for the 'remove' operation.

Returns:

The PropagationConstraint.RemoveConstraint.

setRemoveConstraint

void setRemoveConstraint(PropagationConstraint.RemoveConstraint removeConstraint)

Sets the propagation constraint for the 'remove' operation.

Parameters:

removeConstraint - The PropagationConstraint.RemoveConstraint to set.