ptolemy.domains.sr.lib
Class Absent

java.lang.Object
  |
  +--ptolemy.kernel.util.NamedObj
        |
        +--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:

Actor, java.lang.Cloneable, Debuggable, Executable, Nameable, java.io.Serializable, TypedActor

public class Absent

extends Undefined

This actor outputs absent values. That is, it produces no tokens, and it calls the sendAbsent() method of the output port on each firing.

Since:

Ptolemy II 2.0

Version:

$Id: Absent.java,v 1.6 2002/02/21 20:31:02 cxh Exp $

Author:

Paul Whitaker

See Also:

Serialized Form

Inner classes inherited from class ptolemy.kernel.util.NamedObj

NamedObj.MoMLInfo

Fields inherited from class ptolemy.domains.sr.lib.Undefined

outputType

Fields inherited from class ptolemy.actor.lib.Source

output, trigger

Fields inherited from class ptolemy.kernel.util.NamedObj

_changeListeners, _debugging, _debugListeners, _uniqueNameIndex, _workspace, ATTRIBUTES, CLASSNAME, COMPLETE, CONTENTS, DEEP, FULLNAME, LINKS

Fields inherited from interface ptolemy.actor.Executable

COMPLETED, NOT_READY, STOP_ITERATING

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 sendAbsent() method of the output port.

Methods inherited from class ptolemy.domains.sr.lib.Undefined

attributeChanged

Methods inherited from class ptolemy.actor.TypedAtomicActor

_addPort, attributeTypeChanged, newPort, typeConstraintList

Methods inherited from class ptolemy.actor.AtomicActor

clone, connectionsChanged, getDirector, getExecutiveDirector, getManager, initialize, inputPortList, iterate, newReceiver, outputPortList, postfire, prefire, preinitialize, setContainer, stopFire, terminate, wrapup

Methods inherited from class ptolemy.kernel.ComponentEntity

_checkContainer, getContainer, isAtomic, isOpaque, setName

Methods inherited from class ptolemy.kernel.Entity

_description, _exportMoMLContents, _removePort, connectedPortList, connectedPorts, getAttribute, getPort, getPorts, linkedRelationList, linkedRelations, portList, removeAllPorts, uniqueName

Methods inherited from class ptolemy.kernel.util.NamedObj

_addAttribute, _attachText, _debug, _debug, _debug, _debug, _debug, _getIndentPrefix, _removeAttribute, _splitName, addChangeListener, addDebugListener, attributeList, attributeList, clone, deepContains, depthInHierarchy, description, description, exportMoML, exportMoML, exportMoML, exportMoML, exportMoML, getAttribute, getAttributes, getFullName, getMoMLInfo, getName, getName, removeChangeListener, removeDebugListener, requestChange, setDeferMoMLDefinitionTo, toplevel, toString, workspace

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface ptolemy.actor.Actor

getDirector, getExecutiveDirector, getManager, inputPortList, newReceiver, outputPortList

Methods inherited from interface ptolemy.actor.Executable

initialize, iterate, postfire, prefire, preinitialize, stopFire, terminate, wrapup

Constructor Detail

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.

Method Detail

fire

public void fire()
          throws IllegalActionException

Output an absent value by calling the sendAbsent() method of the output port.

Overrides:

fire in class Source

Throws:

IllegalActionException - If there is no director.