ptolemy.domains.sr.lib
Class Absent
java.lang.Object
ptolemy.kernel.util.NamedObj
ptolemy.kernel.InstantiableNamedObj
ptolemy.kernel.Entity
ptolemy.kernel.ComponentEntity
ptolemy.actor.AtomicActor
ptolemy.actor.TypedAtomicActor
ptolemy.actor.lib.Source
ptolemy.domains.sr.lib.Undefined
ptolemy.domains.sr.lib.Absent
- All Implemented Interfaces:
- java.io.Serializable, java.lang.Cloneable, Actor, Executable, FiringsRecordable, Initializable, TypedActor, Changeable, Debuggable, DebugListener, Derivable, Instantiable, ModelErrorHandler, MoMLExportable, Moveable, Nameable
public class Absent
- extends Undefined
An actor that makes its output value absent. That is, it produces no
tokens, and it calls the send(index, null) method of the output port on
each firing.
- Since:
- Ptolemy II 2.0
- Version:
- $Id: Absent.java 57040 2010-01-27 20:52:32Z cxh $
- Author:
- Paul Whitaker, Haiyang Zheng
- See Also:
- Serialized Form
- Accepted Rating:
- Proposed Rating:
Fields inherited from class ptolemy.kernel.util.NamedObj |
_changeListeners, _changeLock, _changeRequests, _debugging, _debugListeners, _elementName, _isPersistent, _verbose, _workspace, ATTRIBUTES, CLASSNAME, COMPLETE, CONTENTS, DEEP, FULLNAME, LINKS |
Constructor Summary |
Absent(CompositeEntity container,
java.lang.String name)
Construct an actor in the specified container with the specified
name. |
Method Summary |
void |
fire()
Output an absent value by calling the send(0, null) method of the
output port. |
boolean |
isStrict()
Return false. |
boolean |
prefire()
Return true. |
void |
preinitialize()
Override the base class to declare that the output
port does not depend on the trigger port in a firing. |
Methods inherited from class ptolemy.actor.AtomicActor |
_actorFiring, _actorFiring, addActorFiringListener, addInitializable, clone, connectionsChanged, createReceivers, declareDelayDependency, getCausalityInterface, getDirector, getExecutiveDirector, getManager, initialize, inputPortList, isFireFunctional, iterate, newReceiver, outputPortList, postfire, pruneDependencies, recordFiring, removeActorFiringListener, removeDependency, removeInitializable, setContainer, stop, stopFire, terminate, wrapup |
Methods inherited from class ptolemy.kernel.ComponentEntity |
_adjustDeferrals, _checkContainer, _getContainedObject, _propagateExistence, getContainer, instantiate, isAtomic, isOpaque, moveDown, moveToFirst, moveToIndex, moveToLast, moveUp, propagateExistence, setName |
Methods inherited from class ptolemy.kernel.Entity |
_description, _exportMoMLContents, _removePort, _validateSettables, connectedPortList, connectedPorts, containedObjectsIterator, getAttribute, getPort, getPorts, linkedRelationList, linkedRelations, portList, removeAllPorts, setClassDefinition, uniqueName |
Methods inherited from class ptolemy.kernel.util.NamedObj |
_addAttribute, _adjustOverride, _attachText, _cloneFixAttributeFields, _debug, _debug, _debug, _debug, _debug, _getIndentPrefix, _isMoMLSuppressed, _markContentsDerived, _propagateValue, _recordDecoratedAttributes, _removeAttribute, _splitName, _stripNumericSuffix, addChangeListener, addDebugListener, attributeList, attributeList, deepContains, depthInHierarchy, description, description, event, executeChangeRequests, exportMoML, exportMoML, exportMoML, exportMoML, exportMoMLPlain, getAttribute, getAttributes, getChangeListeners, getClassName, getDecoratorAttribute, getDecoratorAttributes, getDerivedLevel, getDerivedList, getDisplayName, getFullName, getModelErrorHandler, getName, getName, getSource, handleModelError, isDeferringChangeRequests, isOverridden, isPersistent, lazyContainedObjectsIterator, message, propagateValue, propagateValues, removeChangeListener, removeDebugListener, requestChange, setClassName, setDeferringChangeRequests, setDerivedLevel, setDisplayName, setModelErrorHandler, setPersistent, setSource, sortContainedObjects, toplevel, toString, validateSettables, workspace |
Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Absent
public Absent(CompositeEntity container,
java.lang.String name)
throws IllegalActionException,
NameDuplicationException
- Construct an actor in the specified container with the specified
name.
- Parameters:
container
- The container.name
- The name of this actor within the container.
- Throws:
IllegalActionException
- If the actor cannot be contained
by the proposed container.
NameDuplicationException
- If the name coincides with
an actor already in the container.
isStrict
public boolean isStrict()
- Return false. This actor can produce some output event the input
receiver has status unknown.
- Specified by:
isStrict
in interface Executable
- Overrides:
isStrict
in class AtomicActor
- Returns:
- False.
fire
public void fire()
throws IllegalActionException
- Output an absent value by calling the send(0, null) method of the
output port.
- Specified by:
fire
in interface Executable
- Overrides:
fire
in class Undefined
- Throws:
IllegalActionException
- If there is no director.
prefire
public boolean prefire()
throws IllegalActionException
- Return true. This actor always fires.
- Specified by:
prefire
in interface Executable
- Overrides:
prefire
in class Undefined
- Returns:
- True.
- Throws:
IllegalActionException
- Not thrown in this base class.
preinitialize
public void preinitialize()
throws IllegalActionException
- Override the base class to declare that the output
port does not depend on the trigger port in a firing.
- Specified by:
preinitialize
in interface Initializable
- Overrides:
preinitialize
in class AtomicActor
- Throws:
IllegalActionException
- If the superclass throws it.