org.omegahat.Environment.Console
Class omega

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--java.awt.Panel
                    |
                    +--java.applet.Applet
                          |
                          +--org.omegahat.Environment.Console.omega

All Implemented Interfaces:

javax.accessibility.Accessible, java.awt.event.ActionListener, java.util.EventListener, java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable

public class omega

extends java.applet.Applet

implements java.awt.event.ActionListener

This is the standard entry point/application for the command-line version of the Omegahat language. This is the simplest way to get an Omegahat session started and basically defers most of the initialization computations to scripts. It creates an EvaluatorManager and then reads the startup script from the property OmegaInit

See Also:

Serialized Form

Inner classes inherited from class java.applet.Applet

java.applet.Applet.AccessibleApplet

Inner classes inherited from class java.awt.Panel

java.awt.Panel.AccessibleAWTPanel

Inner classes inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Inner classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent

Field Summary

protected java.lang.String[]	command_line The command line arguments passed to this Java application.
static java.lang.String	DefaultUserThreadName The name of the Thread variable that can be created in the initialization script on which we will join to ensure that we don't just exit at the end of the script.
protected Evaluator	evaluator The default evaluator that we create as part of the initialization via the EvaluatorManager.
protected InputReader	reader An input reader used to read lines from the user's input on the standard input device and then notifies the evaluator of input pending.

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

omega()

omega(java.lang.String[] argv)

Method Summary

void	actionPerformed(java.awt.event.ActionEvent ev)
java.lang.String[]	args() Retrieve the command line arguments associated with running this instance of the class as an application.
java.lang.String[]	args(java.lang.String[] a) Set the command line arguments.
InputReader	defaultReaderThread(Evaluator evaluator)
void	init() Initialization of this class and, typically, of the Omegahat interactive session.
static void	main(java.lang.String[] argv) The entry point called by the Java Virtual Machine when using this class as an application.

Methods inherited from class java.applet.Applet

destroy, getAccessibleContext, getAppletContext, getAppletInfo, getAudioClip, getAudioClip, getCodeBase, getDocumentBase, getImage, getImage, getLocale, getParameter, getParameterInfo, isActive, newAudioClip, play, play, resize, resize, setStub, showStatus, start, stop

Methods inherited from class java.awt.Panel

addNotify

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getPreferredSize, insets, invalidate, isAncestorOf, layout, list, list, locate, minimumSize, paint, paintComponents, paramString, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setFont, setLayout, update, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addPropertyChangeListener, addPropertyChangeListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, getBackground, getBounds, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getInputContext, getInputMethodRequests, getLocation, getLocation, getLocationOnScreen, getName, getParent, getPeer, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isDisplayable, isDoubleBuffered, isEnabled, isFocusTraversable, isLightweight, isOpaque, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, reshape, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setForeground, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus

Methods inherited from class java.lang.Object

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

Field Detail

DefaultUserThreadName

public static java.lang.String DefaultUserThreadName

The name of the Thread variable that can be created in the initialization script on which we will join to ensure that we don't just exit at the end of the script. If no such variable exists, we terminate at the end of the initialization script.

command_line

protected java.lang.String[] command_line

The command line arguments passed to this Java application.

evaluator

protected Evaluator evaluator

The default evaluator that we create as part of the initialization via the EvaluatorManager.

reader

protected InputReader reader

An input reader used to read lines from the user's input on the standard input device and then notifies the evaluator of input pending.

Constructor Detail

omega

public omega(java.lang.String[] argv)

omega

public omega()

Method Detail

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent ev)

Specified by:

actionPerformed in interface java.awt.event.ActionListener

main

public static void main(java.lang.String[] argv)

The entry point called by the Java Virtual Machine when using this class as an application.

Parameters:

argv - command line arguments passed from the Java virtual machine initialization to this class.

init

public void init()

Initialization of this class and, typically, of the Omegahat interactive session. Called either automatically (if the session is being run as an applet) or from the main() method.

The Java-level initialization is essentially just a bootstrap that evaluates an initialization script in the Omegahat language. The name of the file containing this script is passed to the Java virtual machine when it starts up as the property "OmegaInit". The init() method creates a bootstrap evaluator manager to parse and evaluate the corresponding file (by invoking the bootstrap evaluator's source() method).

The initialization script will typically create a thread in which further user interaction takes place (such as reading and evaluating user-typed expressions). If this thread is assigned to the name in field DefaultUserThreadName, the init() method will join on that thread.

The init() method also assigns the this object as ".applet" in the default database.

Overrides:

init in class java.applet.Applet

args

public java.lang.String[] args()

Retrieve the command line arguments associated with running this instance of the class as an application.

args

public java.lang.String[] args(java.lang.String[] a)

Set the command line arguments.

defaultReaderThread

public InputReader defaultReaderThread(Evaluator evaluator)