ptolemy.domains.sdf.lib
Class DelayLine

java.lang.Object
  ptolemy.kernel.util.NamedObj
      ptolemy.kernel.InstantiableNamedObj
          ptolemy.kernel.Entity
              ptolemy.kernel.ComponentEntity
                  ptolemy.actor.AtomicActor
                      ptolemy.actor.TypedAtomicActor
                          ptolemy.domains.sdf.lib.SDFTransformer
                              ptolemy.domains.sdf.lib.DelayLine

All Implemented Interfaces:

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

public class DelayLine
extends SDFTransformer

This actor reads tokens from its input port, and for each token read outputs an array that contains the current token as the first token, followed by some number of previously read tokens. The length of the output array is the same as that of the array in the initialValues parameter. That parameter also provides the initial values when there are no previously read tokens.

Note that this actor is not a simple sample delay. Use the SampleDelay actor to achieve a simple sample delay.

Since:

Ptolemy II 1.0

Version:

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

Author:

Steve Neuendorffer

See Also:

SampleDelay, Serialized Form

Accepted Rating:

Yellow (neuendor)

Proposed Rating:

Yellow (yuhong)

Nested Class Summary

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

Entity.ContainedObjectsIterator

Field Summary

private Token[]	_delayLine The delay line.
Parameter	initialValues The initial values of the delay line.

Fields inherited from class ptolemy.domains.sdf.lib.SDFTransformer

input, input_tokenConsumptionRate, output, output_tokenInitProduction, output_tokenProductionRate

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

DelayLine(CompositeEntity container, java.lang.String name)
Construct an actor with the given container and name.

Method Summary

void	attributeTypeChanged(Attribute attribute) Override the base class to allow type changes on initialValues.
java.lang.Object	clone(Workspace workspace) Clone the actor into the specified workspace.
void	fire() Consume a token from the input, push it onto the delay line and produce the output ArrayToken containing the current state of the delay line.
void	initialize() Initialize this actor by reading the value of initialValues.

Methods inherited from class ptolemy.domains.sdf.lib.SDFTransformer

prefire

Methods inherited from class ptolemy.actor.TypedAtomicActor

_addPort, _fireAt, _fireAt, 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, postfire, 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, attributeChanged, 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, postfire, 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

initialValues

public Parameter initialValues

The initial values of the delay line. This parameter must contain an ArrayToken. The default value is an array that contains 4 integer tokens. Changes to this parameter after initialize() has been invoked are ignored until the next execution of the model.

_delayLine

private Token[] _delayLine

The delay line.

Constructor Detail

DelayLine

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

Construct an actor with the given container and name.

Parameters:

container - The container.

name - The name of this actor.

Throws:

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

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

Method Detail

attributeTypeChanged

public void attributeTypeChanged(Attribute attribute)
                          throws IllegalActionException

Override the base class to allow type changes on initialValues.

Overrides:

attributeTypeChanged in class TypedAtomicActor

Parameters:

attribute - The attribute whose type changed.

Throws:

IllegalActionException - If type changes are not allowed on the specified attribute.

clone

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

Clone the actor into the specified workspace. This overrides the base class to handle type constraints.

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

Consume a token from the input, push it onto the delay line and produce the output ArrayToken containing the current state of the delay line.

Specified by:

fire in interface Executable

Overrides:

fire in class AtomicActor

Throws:

IllegalActionException - If not enough tokens are available.

initialize

public void initialize()
                throws IllegalActionException

Initialize this actor by reading the value of initialValues.

Specified by:

initialize in interface Initializable

Overrides:

initialize in class AtomicActor

Throws:

IllegalActionException - If a derived class throws it.