15.4.3.1 Object Nodes - An ObjectNode holds object tokens during the course of the execution of an Activity.

Icon class
icon_class
fas fa-quote-left
icon_class_computed
fas fa-quote-left
Related content
Source
Unified Modeling Language 2.5.1
Copyright information
About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes
Snippet kind
INFO
UML keywords
Activity
ObjectNode
token
object token
Full quote
15.4.3.1 Object Nodes An ObjectNode holds object tokens during the course of the execution of an Activity.
Next snippet
Except in the case of an input ActivityParameterNode ... the tokens held by an ObjectNode arrive from incoming ActivityEdges.
15.4.3.1 Object Nodes - An ObjectNode holds object tokens during the course of the execution of an Activity.
Related snippets
Related snippets (backlinks)
Except in the case of an output ActivityParameterNode, tokens held by an ObjectNode may leave the node on outgoing ActivityEdges.
A token may traverse only one of the outgoing edges.
An ObjectNode may contain multiple object tokens with the same value. Such tokens are not normally combined (but see the special semantics for DataStoreNodes ...).
ObjectNodes are TypedElements ... If an ObjectNode has a type specified, then any object tokens held by the ObjectNode shall have values that conform to the type of the ObjectNode. If no type is specified, then the values may be of any type.
Null tokens (object tokens without a value) satisfy the type of all object nodes.
ObjectNodes may also specify an inState set of States. If such a set is specified, then any object token held by the ObjectNode shall have a value with a type that has or inherits a StateMachine as its classifierBehavior that has all of the states ..
An ObjectNode may not contain more tokens than specified by its upperBound, if any. If an ObjectNode has an upperBound, then this ValueSpecification shall evaluate to an UnlimitedNatural value. The upperBound is evaluated each time a token is offered ...
If the number of tokens already held by the ObjectNode is greater than or equal to the evaluated upperBound, then the ObjectNode shall not accept any further tokens until some of the ones it is holding are removed.
If the removal of one or more tokens brings the number of tokens held below the evaluated upperBound, then the ObjectNode may accept any pending offers up to the limit of the upperBound.
If the upperBound evaluates to *, then there is no limit on the number of tokens the ObjectNode may hold.
Visit also
Visit also (backlinks)