jess
Class Defglobal

java.lang.Object
  |
  +--jess.Defglobal

All Implemented Interfaces:

java.io.Serializable, Visitable

public class Defglobal

extends java.lang.Object

implements java.io.Serializable, Visitable

Class used to represent Defglobals. You can create Defglobals and add them to a Rete engine using Rete.addDefglobal.

(C) 1997 Ernest J. Friedman-Hill and Sandia National Laboratories

Author:

Ernest J. Friedman-Hill

See Also:

Serialized Form

Constructor Summary

Defglobal(java.lang.String name, Value val)
Create a defglobal.

Method Summary

java.lang.Object	accept(Visitor v)
Value	getInitializationValue() Get this defglobal's initialization value.
java.lang.String	getName() Get this defglobal's variable name
void	reset(Rete engine) Reinject this Defglobal into the engine
java.lang.String	toString() Describe myself

Methods inherited from class java.lang.Object

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

Constructor Detail

Defglobal

public Defglobal(java.lang.String name,
                 Value val)
          throws JessException

Create a defglobal. Should be added to a Rete object with Rete.addDefglobal. Note that a separate Defglobal object must be created for each global variable, even though one (defglobal) construct may represent more than one such variable.

Parameters:

name - The defglobal's variable name. Note that the name must begin and end with an asterisk.

val - The initial value for the defglobal; can be an RU.FUNCALL value.

Throws:

JessException - If anything goes wrong.

Method Detail

reset

public void reset(Rete engine)
           throws JessException

Reinject this Defglobal into the engine

getName

public java.lang.String getName()

Get this defglobal's variable name

Returns:

The variable name

getInitializationValue

public Value getInitializationValue()

Get this defglobal's initialization value. The returned Value may be a simple value, a Variable, or a FuncallValue, so be careful how you interpret it.

Returns:

The value this variable was originally initialized to

toString

public java.lang.String toString()

Describe myself

Overrides:

toString in class java.lang.Object

Returns:

A pretty-printed version of the defglobal, suitable for parsing

accept

public java.lang.Object accept(Visitor v)

Specified by:

accept in interface Visitable