ptolemy.domains.ct.lib
Class ZeroOrderHold
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.Transformer
ptolemy.domains.ct.lib.ZeroOrderHold
- All Implemented Interfaces:
- java.io.Serializable, java.lang.Cloneable, Actor, Executable, FiringsRecordable, Initializable, TypedActor, CTWaveformGenerator, Changeable, Debuggable, DebugListener, Derivable, Instantiable, ModelErrorHandler, MoMLExportable, Moveable, Nameable
public class ZeroOrderHold
- extends Transformer
- implements CTWaveformGenerator
Convert discrete events at the input to a continuous-time
signal at the output by holding the value of the discrete
event until the next discrete event arrives.
- Since:
- Ptolemy II 0.4
- Version:
- $Id: ZeroOrderHold.java 57040 2010-01-27 20:52:32Z cxh $
- Author:
- Jie Liu
- 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 |
ZeroOrderHold(CompositeEntity container,
java.lang.String name)
Construct an actor in the specified container with the specified
name. |
Method Summary |
java.lang.Object |
clone(Workspace workspace)
Clone the actor into the specified workspace. |
void |
fire()
Output the latest token consumed from the consumeCurrentEvents()
call. |
void |
initialize()
Initialize token. |
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, prefire, 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.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 |
defaultValue
public Parameter defaultValue
- Default output before any input has received.
The default is an integer with value 0.
The type of the output is set to at least this type.
_lastToken
private Token _lastToken
ZeroOrderHold
public ZeroOrderHold(CompositeEntity container,
java.lang.String name)
throws IllegalActionException,
NameDuplicationException
- Construct an actor in the specified container with the specified
name. The name must be unique within the container or an exception
is thrown. The container argument must not be null, or a
NullPointerException will be thrown.
- Parameters:
container
- The subsystem that this actor is lived inname
- The actor's name
- Throws:
IllegalActionException
- If the entity cannot be contained
by the proposed container.
NameDuplicationException
- If name coincides with
an entity already in the container.
clone
public java.lang.Object clone(Workspace workspace)
throws java.lang.CloneNotSupportedException
- Clone the actor into the specified workspace.
- 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 has
an attribute that cannot be cloned.- See Also:
NamedObj.exportMoML(Writer, int, String)
,
NamedObj.setDeferringChangeRequests(boolean)
fire
public void fire()
throws IllegalActionException
- Output the latest token consumed from the consumeCurrentEvents()
call.
- Specified by:
fire
in interface Executable
- Overrides:
fire
in class AtomicActor
- Throws:
IllegalActionException
- If the token cannot be sent.
initialize
public void initialize()
throws IllegalActionException
- Initialize token. If there is no input, the initial token is
a zero Double Token.
- Specified by:
initialize
in interface Initializable
- Overrides:
initialize
in class AtomicActor
- Throws:
IllegalActionException
- If thrown by the super class.