ptolemy.actor.lib
Class SequentialClock

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.SequentialClock

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Actor, Executable, FiringsRecordable, Initializable, SequenceActor, TypedActor, Changeable, Debuggable, DebugListener, Derivable, Instantiable, ModelErrorHandler, MoMLExportable, Moveable, Nameable

Deprecated. Use Clock instead.

public class SequentialClock
extends TypedAtomicActor
implements SequenceActor

A clock source for sequence-capable domains. This actor is considerably simpler than the Clock actor. On each firing, it produces the next value from its values parameter, and schedules another firing at a future time determined by the offsets and period parameters.

This actor can be used in the DE domain to generate a sequence of events at regularly spaced intervals. It cannot be used in CT, because CT will invoke it at times where it has not requested a firing, and it will inappropriately advance to the next output value.

At the beginning of each time interval of length given by period, it initiates a sequence of output events with values given by values and offset into the period given by offsets. These parameters contain arrays, which are required to have the same length. The offsets array must be nondecreasing and nonnegative, or an exception will be thrown when it is set. Moreover, its largest entry must be smaller than period or an exception will be thrown by the fire() method.

The values parameter by default contains an array of IntTokens with values 1 and 0. The default offsets array is {0.0, 1.0}. Thus, the default output will be alternating 1 and 0 with 50% duty cycle. The default period is 2.0.

The actor uses the fireAt() method of the director to request firing at the beginning of each period plus each of the offsets. It assumes that all of its firings are in response to such requests.

The type of the output can be any token type. This type is inferred from the element type of the values parameter.

This actor is a timed source; the untimed version is Pulse.

Since:

Ptolemy II 1.0

Version:

$Id: SequentialClock.java 57040 2010-01-27 20:52:32Z cxh $

Author:

Edward A. Lee

See Also:

Serialized Form

Accepted Rating:

Red (yuhong)

Proposed Rating:

Yellow (eal)

Nested Class Summary

Nested classes/interfaces inherited from class ptolemy.kernel.Entity

Entity.ContainedObjectsIterator

Field Summary

private Token	_currentValue Deprecated.
private Time	_cycleStartTime Deprecated.
private boolean	_firstFiring Deprecated.
private double[]	_offsets Deprecated.
private int	_phase Deprecated.
Parameter	offsets Deprecated. The offsets at which the specified values will be produced.
TypedIOPort	output Deprecated. The output port.
Parameter	period Deprecated. The period of the output waveform.
Parameter	values Deprecated. The values that will be produced at the specified offsets.

Fields inherited from class ptolemy.actor.AtomicActor

_actorFiringListeners, _initializables, _notifyingActorFiring, _stopRequested

Fields inherited from class ptolemy.kernel.util.NamedObj

_changeListeners, _changeLock, _changeRequests, _debugging, _debugListeners, _elementName, _isPersistent, _verbose, _workspace, ATTRIBUTES, CLASSNAME, COMPLETE, CONTENTS, DEEP, FULLNAME, LINKS

Fields inherited from interface ptolemy.actor.Executable

COMPLETED, NOT_READY, STOP_ITERATING

Constructor Summary

SequentialClock(CompositeEntity container, java.lang.String name)
Deprecated. Construct an actor with the specified container and name.

Method Summary

void	attributeChanged(Attribute attribute) Deprecated. If the argument is the offsets parameter, check that the array is nondecreasing and has the right dimension; if the argument is period, check that it is positive.
java.lang.Object	clone(Workspace workspace) Deprecated. Clone the actor into the specified workspace.
void	fire() Deprecated. Output the current value of the clock.
void	initialize() Deprecated. Schedule the first firing and initialize local variables.
boolean	postfire() Deprecated. Update the state of the actor and schedule the next firing, if appropriate.
boolean	prefire() Deprecated. Set the current value.

Methods inherited from class ptolemy.actor.TypedAtomicActor

_addPort, _fireAt, _fireAt, attributeTypeChanged, clone, newPort, typeConstraintList, typeConstraints

Methods inherited from class ptolemy.actor.AtomicActor

_actorFiring, _actorFiring, addActorFiringListener, addInitializable, connectionsChanged, createReceivers, declareDelayDependency, getCausalityInterface, getDirector, getExecutiveDirector, getManager, inputPortList, isFireFunctional, isStrict, iterate, newReceiver, outputPortList, preinitialize, 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.InstantiableNamedObj

_setParent, exportMoML, getChildren, getElementName, getParent, getPrototypeList, isClassDefinition, isWithinClassDefinition

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

Methods inherited from interface ptolemy.actor.Actor

createReceivers, getCausalityInterface, getDirector, getExecutiveDirector, getManager, inputPortList, newReceiver, outputPortList

Methods inherited from interface ptolemy.actor.Executable

isFireFunctional, isStrict, iterate, stop, stopFire, terminate

Methods inherited from interface ptolemy.actor.Initializable

addInitializable, preinitialize, removeInitializable, wrapup

Methods inherited from interface ptolemy.kernel.util.Nameable

description, getContainer, getDisplayName, getFullName, getName, getName, setName

Methods inherited from interface ptolemy.kernel.util.Derivable

getDerivedLevel, getDerivedList, propagateValue

Field Detail

output

public TypedIOPort output

Deprecated.

The output port. The type of this port is determined by from the values parameter.

offsets

public Parameter offsets

Deprecated.

The offsets at which the specified values will be produced. This parameter must contain an array of doubles, and it defaults to {0.0, 1.0}.

period

public Parameter period

Deprecated.

The period of the output waveform. This parameter must contain a DoubleToken, and defaults to 2.0.

values

public Parameter values

Deprecated.

The values that will be produced at the specified offsets. This parameter must contain an ArrayToken, and defaults to {1, 0}.

_currentValue

private transient Token _currentValue

Deprecated.

_cycleStartTime

private transient Time _cycleStartTime

Deprecated.

_firstFiring

private boolean _firstFiring

Deprecated.

_offsets

private transient double[] _offsets

Deprecated.

_phase

private transient int _phase

Deprecated.

Constructor Detail

SequentialClock

public SequentialClock(CompositeEntity container,
                       java.lang.String name)
                throws NameDuplicationException,
                       IllegalActionException

Deprecated.

Construct an actor with the specified container and name.

Parameters:

container - The container.

name - The name of this actor.

Throws:

IllegalActionException - If the entity cannot be contained by the proposed container.

NameDuplicationException - If the container already has an actor with this name.

Method Detail

attributeChanged

public void attributeChanged(Attribute attribute)
                      throws IllegalActionException

Deprecated.

If the argument is the offsets parameter, check that the array is nondecreasing and has the right dimension; if the argument is period, check that it is positive. Other sanity checks with period and values are done in the fire() method.

Overrides:

attributeChanged in class NamedObj

Parameters:

attribute - The attribute that changed.

Throws:

IllegalActionException - If the offsets array is not nondecreasing and nonnegative, or it is not a row vector.

clone

public java.lang.Object clone(Workspace workspace)
                       throws java.lang.CloneNotSupportedException

Deprecated.

Clone the actor into the specified workspace. This calls the base class and then sets the parameter public members to refer to the parameters of the new actor.

Overrides:

clone in class AtomicActor

Parameters:

workspace - The workspace for the new object.

Returns:

A new actor.

Throws:

java.lang.CloneNotSupportedException - If a derived class contains an attribute that cannot be cloned.

See Also:

NamedObj.exportMoML(Writer, int, String), NamedObj.setDeferringChangeRequests(boolean)

fire

public void fire()
          throws IllegalActionException

Deprecated.

Output the current value of the clock.

Specified by:

fire in interface Executable

Overrides:

fire in class AtomicActor

Throws:

IllegalActionException - If the values and offsets parameters do not have the same length, or if the value in the offsets parameter is encountered that is greater than the period, or if there is no director.

initialize

public void initialize()
                throws IllegalActionException

Deprecated.

Schedule the first firing and initialize local variables.

Specified by:

initialize in interface Initializable

Overrides:

initialize in class AtomicActor

Throws:

IllegalActionException - If the parent class throws it, or if the values parameter is not a row vector, or if the fireAt() method of the director throws it, or if the director does not agree to fire the actor at the specified time.

postfire

public boolean postfire()
                 throws IllegalActionException

Deprecated.

Update the state of the actor and schedule the next firing, if appropriate.

Specified by:

postfire in interface Executable

Overrides:

postfire in class AtomicActor

Returns:

True if execution can continue into the next iteration.

Throws:

IllegalActionException - If the director throws it when scheduling the next firing, or if the length of the values and offsets parameters don't match.

prefire

public boolean prefire()
                throws IllegalActionException

Deprecated.

Set the current value.

Specified by:

prefire in interface Executable

Overrides:

prefire in class AtomicActor

Returns:

True.

Throws:

IllegalActionException - If there is no director.