Package blackboard.data

Provides the base classes for the persistence layer of platform API.

See:
Description

Interface Summary

Available	The Available interface specifies a set of methods for determining the availability of an object.
IBbObject	The IBbObject class is an interface representing the root of the data class hierarchy.
Immutable	The Immutable interface defines a means for specifying an object that can be made immutable.
Positionable	The Positionable interface specifies a set of methods for setting/determining the position of an object within a list of objects.

Class Summary

AttributePermission	Permission encapsulating granular access to data object attributes.
AvailabilityFilter	List Filter used to filter on the availability of an object.
BbAttribute	The BbAttribute class is used to form the basis of the name/value pairs used for IBbObject based object properties.
BbAttribute.Type
BbAttributes	The BbAttributes class is used to store a set of BbAttribute objects.
BbLink	Provides a wrapper around URL elements for attaching to data objects within the persistence framework.
BbObject	The BbObject class is the root of the data class hierarchy.
ValidationWarning	Class used to encapsulate data validity violations.

Exception Summary

BbAttributeException	A general exception resulting from a problem with the attributes (BbAttribute) of an object (BbObject).
ImmutableException	Thrown if an attempt is made to modify an object that implements the Immutable interface is made after the object is marked as being complete.
ValidationException	This exception is thrown to indicate that a data object has invalid or corrupt data.

Package blackboard.data Description

Provides the base classes for the persistence layer of platform API. The most important classes in this package are the BbObject and the related BbAttribute objects. BbObject is the base class for all data objects in the Blackboard system, defining core attributes such as the Id and creation dates (though the semantics change on some objects).

The BbAttribute objects are used to wrap object properties in the Blackboard persistence layer. They provide the foundation for automatic SQL generation and type mapping.