visad

Class CellImpl

java.lang.Object

visad.ActionImpl

visad.CellImpl

All Implemented Interfaces:

Runnable, EventListener, Action, Cell, ThingChangedListener

Direct Known Subclasses:

SSCellImpl

public abstract class CellImpl
extends ActionImpl
implements Cell

CellImpl is the abstract superclass for computations. It has a set of input DataReferences and an output DataReference, which updates whenever an input changes. Cell is runnable.

CellImpl is not Serializable and should not be copied between JVMs.

Field Summary

Fields inherited from class visad.ActionImpl

TRACE_STACK, TRACE_TIME

Constructor Summary

Constructors

Constructor and Description
CellImpl() construct a CellImpl with null name
CellImpl(String name) construct a CellImpl

Method Summary

Modifier and Type	Method and Description
abstract void	doAction() subclasses of CellImpl implement doAction to execute triggered computation
DataReference	getOtherReference(int index)
void	setOtherReference(int index, DataReference ref) set a non-triggering link to a DataReference; this is used to give the Cell access to Data without triggering the Cell's doAction whenever the Data changes; these 'other' DataReferences are identified by their integer index

Methods inherited from class visad.ActionImpl

addReference, checkTicks, disableAction, enableAction, findReference, getCurrentActionThread, getLinks, getName, getTaskCount, printPool, removeAllReferences, removeReference, run, setEnabled, setName, setThreadPoolMaximum, stop, stopThreadPool, thingChanged, waitForTasks

Methods inherited from class java.lang.Object

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

Methods inherited from interface visad.Action

addReference, getName, removeAllReferences, removeReference

Methods inherited from interface visad.ThingChangedListener

thingChanged

Constructor Detail

CellImpl

public CellImpl()

construct a CellImpl with null name

CellImpl

public CellImpl(String name)

construct a CellImpl

Parameters:

name - - String useful for debugging

Method Detail

doAction

public abstract void doAction()
                       throws VisADException,
                              RemoteException

subclasses of CellImpl implement doAction to execute triggered computation

Specified by:

doAction in class ActionImpl

Throws:

VisADException - - a VisAD error occurred

RemoteException - - an RMI error occurred

setOtherReference

public void setOtherReference(int index,
                              DataReference ref)
                       throws VisADException,
                              RemoteException

set a non-triggering link to a DataReference; this is used to give the Cell access to Data without triggering the Cell's doAction whenever the Data changes; these 'other' DataReferences are identified by their integer index

Specified by:

setOtherReference in interface Cell

Parameters:

index - - identifier of DataReference

ref - - DataReference to be linked

Throws:

VisADException - - a VisAD error occurred

RemoteException - - an RMI error occurred

getOtherReference

public DataReference getOtherReference(int index)
                                throws VisADException,
                                       RemoteException

Specified by:

getOtherReference in interface Cell

Parameters:

index - - identifier of DataReference to return

Returns:

the non-triggering link to a DataReference identified by index

Throws:

VisADException - - a VisAD error occurred

RemoteException - - an RMI error occurred