ptolemy.actor.lib.gui

Class InteractiveShell

java.lang.Object

ptolemy.kernel.util.NamedObj

ptolemy.kernel.InstantiableNamedObj

ptolemy.kernel.Entity<T>

ptolemy.kernel.ComponentEntity<T>

ptolemy.actor.AtomicActor<TypedIOPort>

ptolemy.actor.TypedAtomicActor

ptolemy.actor.lib.gui.InteractiveShell

All Implemented Interfaces:

java.lang.Cloneable, Actor, Executable, FiringsRecordable, Placeable, Initializable, UsesInvokeAndWait, TypedActor, ShellInterpreter, Changeable, Debuggable, DebugListener, Derivable, Instantiable, ModelErrorHandler, MoMLExportable, Moveable, Nameable

public class InteractiveShell
extends TypedAtomicActor
implements Placeable, ShellInterpreter, UsesInvokeAndWait

This actor creates a command shell on the screen, sending commands that are typed by the user to its output port, and reporting values received at its input by displaying them. Each time it fires, it reads the input, displays it, then displays a command prompt (which by default is ">>"), and waits for a command to be typed. The command is terminated by an enter or return character, which then results in the command being produced on the output. In a typical use of this actor, it will be preceded by a SampleDelay actor which will provide an initial welcome message or instructions. The output will then be routed to some subsystem for processing, and the result will be fed back to the input.

If the user types "quit" or "exit" (without the quotation marks) on the prompt, then this actor's postfire() method will return false. Depending on the domain, this can result in the model execution stopping (in SDF, for example) or in subsequent firings of this actor being skipped (in DE, for example).

Note that because of complexities in Swing, if you resize the display window, then, unlike the plotters, the new size will not be persistent. That is, if you save the model and then re-open it, the new size is forgotten. The position, however, is persistent.

Since:

Ptolemy II 1.0

Version:

$Id$

Author:

Edward A. Lee

Pt.AcceptedRating:

Red (cxh)

Pt.ProposedRating:

Yellow (eal)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	InteractiveShell.ShellFrame The frame that is created by an instance of ShellTableau.
class	InteractiveShell.ShellTableau Version of ExpressionShellTableau that records the size of the display when it is closed.

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

Entity.ContainedObjectsIterator

Field Summary

Fields

Modifier and Type	Field and Description
TypedIOPort	input The input port.
TypedIOPort	output The output port.
PortParameter	prompt The prompt.
ShellTextArea	shell The shell window object.

Fields inherited from class ptolemy.actor.TypedAtomicActor

_typesValid

Fields inherited from class ptolemy.actor.AtomicActor

_actorFiringListeners, _initializables, _notifyingActorFiring, _stopRequested

Fields inherited from class ptolemy.kernel.util.NamedObj

_changeListeners, _changeLock, _changeRequests, _debugging, _debugListeners, _deferChangeRequests, _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

Constructors

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

Method Summary

Modifier and Type	Method and Description
protected java.util.Set<Inequality>	_customTypeConstraints() Set the input port greater than or equal to BaseType.GENERAL in case backward type inference is enabled and the input port has no type declared.
protected void	_exportMoMLContents(java.io.Writer output, int depth) Write a MoML description of the contents of this object.
java.lang.Object	clone(Workspace workspace) Clone the actor into the specified workspace.
java.lang.String	evaluateCommand(java.lang.String command) Evaluate the specified command.
void	fire() Read and display the input, then wait for user input and produce the user data on the output.
java.lang.String	getOutput() Get the output string to be sent.
void	initialize() If the shell has not already been created, create it.
boolean	isCommandComplete(java.lang.String command) Return true if the specified command is complete (ready to be interpreted).
void	place(java.awt.Container container) Specify the container into which this shell should be placed.
boolean	postfire() Override the base class to return false if the user has typed "quit" or "exit".
void	setContainer(CompositeEntity container) Override the base class to remove the shell from its graphical container if the argument is null.
void	setDisplayName(java.lang.String name) Set a name to present to the user.
void	setName(java.lang.String name) Set or change the name.
void	setOutput(java.lang.String value) Specify an output string to be sent.
void	stop() Override the base class to call notifyAll() to get out of any waiting.
void	wrapup() Override the base class to make the shell uneditable.

Methods inherited from class ptolemy.actor.TypedAtomicActor

_containedTypeConstraints, _defaultTypeConstraints, _fireAt, _fireAt, attributeTypeChanged, clone, isBackwardTypeInferenceEnabled, newPort, typeConstraintList, typeConstraints

Methods inherited from class ptolemy.actor.AtomicActor

_actorFiring, _actorFiring, _declareDelayDependency, addActorFiringListener, addInitializable, connectionsChanged, createReceivers, declareDelayDependency, getCausalityInterface, getDirector, getExecutiveDirector, getManager, inputPortList, isFireFunctional, isStrict, iterate, newReceiver, outputPortList, prefire, preinitialize, pruneDependencies, recordFiring, removeActorFiringListener, removeDependency, removeInitializable, stopFire, terminate

Methods inherited from class ptolemy.kernel.ComponentEntity

_adjustDeferrals, _checkContainer, _getContainedObject, _propagateExistence, getContainer, instantiate, isAtomic, isOpaque, moveDown, moveToFirst, moveToIndex, moveToLast, moveUp, propagateExistence

Methods inherited from class ptolemy.kernel.Entity

_addPort, _description, _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, _containedDecorators, _copyChangeRequestList, _debug, _debug, _debug, _debug, _debug, _executeChangeRequests, _getIndentPrefix, _isMoMLSuppressed, _markContentsDerived, _notifyHierarchyListenersAfterChange, _notifyHierarchyListenersBeforeChange, _propagateValue, _removeAttribute, _splitName, _stripNumericSuffix, addChangeListener, addDebugListener, addHierarchyListener, attributeChanged, attributeDeleted, attributeList, attributeList, decorators, 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, notifyOfNameChange, propagateValue, propagateValues, removeAttribute, removeChangeListener, removeDebugListener, removeHierarchyListener, requestChange, setClassName, setDeferringChangeRequests, setDerivedLevel, 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, prefire, stopFire, terminate

Methods inherited from interface ptolemy.actor.Initializable

addInitializable, preinitialize, removeInitializable

Methods inherited from interface ptolemy.kernel.util.Nameable

description, getContainer, getDisplayName, getFullName, getName, getName

Methods inherited from interface ptolemy.kernel.util.Derivable

getDerivedLevel, getDerivedList, propagateValue

Field Detail

input

public TypedIOPort input

The input port. By default, this has undeclared type. If backward type inference is enabled, then it has type general. In either case, it can receive any data type. If it receives token of type string, it strips off the surrounding double quotes before displaying the value.

output

public TypedIOPort output

The output port.

prompt

public PortParameter prompt

The prompt. The initial default is the string ">> ". Double quotes are not necessary. If you would like to have no prompt (aka, the empty string), create a Parameter that has the value "" (for example foo) and then set the value of the prompt parameter to $foo.

shell

public ShellTextArea shell

The shell window object.

Constructor Detail

InteractiveShell

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

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

clone

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

Clone the actor into the specified workspace.

Overrides:

clone in class TypedAtomicActor

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)

evaluateCommand

public java.lang.String evaluateCommand(java.lang.String command)
                                 throws java.lang.Exception

Evaluate the specified command.

Specified by:

evaluateCommand in interface ShellInterpreter

Parameters:

command - The command.

Returns:

The return value of the command, or null if there is none.

Throws:

java.lang.Exception - If something goes wrong processing the command.

See Also:

ShellTextArea.returnResult(String)

fire

public void fire()
          throws IllegalActionException

Read and display the input, then wait for user input and produce the user data on the output. If the user input is "quit" or "exit", then set a flag that causes postfire() to return false.

Specified by:

fire in interface Executable

Overrides:

fire in class AtomicActor<TypedIOPort>

Throws:

IllegalActionException - If producing the output causes an exception.

getOutput

public java.lang.String getOutput()

Get the output string to be sent. This does not return until a value is entered on the shell by the user.

Returns:

The output string to be sent.

See Also:

setOutput(String)

initialize

public void initialize()
                throws IllegalActionException

If the shell has not already been created, create it. Then wait for user input and produce it on the output.

Specified by:

initialize in interface Initializable

Overrides:

initialize in class AtomicActor<TypedIOPort>

Throws:

IllegalActionException - If the parent class throws it.

isCommandComplete

public boolean isCommandComplete(java.lang.String command)

Return true if the specified command is complete (ready to be interpreted).

Specified by:

isCommandComplete in interface ShellInterpreter

Parameters:

command - The command.

Returns:

True.

place

public void place(java.awt.Container container)

Specify the container into which this shell should be placed. This method needs to be called before the first call to initialize(). Otherwise, the shell will be placed in its own frame. The background of the plot is set equal to that of the container (unless it is null).

Specified by:

place in interface Placeable

Parameters:

container - The container into which to place the shell, or null to specify that a new shell should be created.

postfire

public boolean postfire()
                 throws IllegalActionException

Override the base class to return false if the user has typed "quit" or "exit".

Specified by:

postfire in interface Executable

Overrides:

postfire in class AtomicActor<TypedIOPort>

Returns:

False if the user has typed "quit" or "exit".

Throws:

IllegalActionException - If the superclass throws it.

setContainer

public void setContainer(CompositeEntity container)
                  throws IllegalActionException,
                         NameDuplicationException

Override the base class to remove the shell from its graphical container if the argument is null.

Overrides:

setContainer in class AtomicActor<TypedIOPort>

Parameters:

container - The proposed container.

Throws:

IllegalActionException - If the base class throws it.

NameDuplicationException - If the base class throws it.

See Also:

ComponentEntity.getContainer()

setDisplayName

public void setDisplayName(java.lang.String name)

Set a name to present to the user.

If the Plot window has been rendered, then the title of the Plot window will be updated to the value of the name parameter.

Overrides:

setDisplayName in class NamedObj

Parameters:

name - A name to present to the user.

See Also:

NamedObj.getDisplayName()

setName

public void setName(java.lang.String name)
             throws IllegalActionException,
                    NameDuplicationException

Set or change the name. If a null argument is given the name is set to an empty string. Increment the version of the workspace. This method is write-synchronized on the workspace.

If the Plot window has been rendered, then the title of the Plot window will be updated to the value of the name parameter.

Specified by:

setName in interface Nameable

Overrides:

setName in class ComponentEntity<TypedIOPort>

Parameters:

name - The new name.

Throws:

IllegalActionException - If the name contains a period or if the object is a derived object and the name argument does not match the current name.

NameDuplicationException - Not thrown in this base class. May be thrown by derived classes if the container already contains an object with this name.

See Also:

NamedObj.getName(), NamedObj.getName(NamedObj)

setOutput

public void setOutput(java.lang.String value)

Specify an output string to be sent. This method appends the specified string to a queue. Strings are retrieved from the queue by getOutput().

Parameters:

value - An output string to be sent.

See Also:

getOutput()

stop

public void stop()

Override the base class to call notifyAll() to get out of any waiting.

Specified by:

stop in interface Executable

Overrides:

stop in class AtomicActor<TypedIOPort>

wrapup

public void wrapup()
            throws IllegalActionException

Override the base class to make the shell uneditable.

Specified by:

wrapup in interface Initializable

Overrides:

wrapup in class AtomicActor<TypedIOPort>

Throws:

IllegalActionException - If the parent class throws it.

_customTypeConstraints

protected java.util.Set<Inequality> _customTypeConstraints()

Set the input port greater than or equal to BaseType.GENERAL in case backward type inference is enabled and the input port has no type declared.

Overrides:

_customTypeConstraints in class TypedAtomicActor

Returns:

A set of inequalities.

_exportMoMLContents

protected void _exportMoMLContents(java.io.Writer output,
                                   int depth)
                            throws java.io.IOException

Write a MoML description of the contents of this object. This overrides the base class to make sure that the current frame properties, if there is a frame, are recorded.

Overrides:

_exportMoMLContents in class Entity<TypedIOPort>

Parameters:

output - The output stream to write to.

depth - The depth in the hierarchy, to determine indenting.

Throws:

java.io.IOException - If an I/O error occurs.

See Also:

NamedObj.exportMoML(Writer, int)