jess
Class Defglobal

java.lang.Object
  jess.Defglobal

All Implemented Interfaces:

Named, java.io.Serializable, Visitable

public class Defglobal

extends java.lang.Object

implements java.io.Serializable, Visitable, Named

A Defglobal is a globally-accessible Jess variable. It has a special naming convention: the name must begin and end with an asterisk (*). You can create Defglobals and add them to a Rete engine using Rete.addDefglobal.x

(C) 2005 Sandia National Laboratories

See Also:

Serialized Form

Constructor Summary

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

Method Summary

java.lang.Object	accept(Visitor v) A proper accept() implementation should call one of the visitXXX() methods on the Visitor.
java.lang.String	getConstructType() Return the type of construct this object is; for example, "defrule", "deftemplate", etc.
java.lang.String	getDocstring() Always returns null
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)

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

Throws:

JessException

getName

public java.lang.String getName()

Get this defglobal's variable name

Specified by:

getName in interface Named

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

Returns:

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

accept

public java.lang.Object accept(Visitor v)

Description copied from interface: Visitable

A proper accept() implementation should call one of the visitXXX() methods on the Visitor.

Specified by:

accept in interface Visitable

Parameters:

v - a visitor to invoke

Returns:

whatever the invoked Visitor method returns.

getConstructType

public final java.lang.String getConstructType()

Description copied from interface: Named

Return the type of construct this object is; for example, "defrule", "deftemplate", etc.

Specified by:

getConstructType in interface Named

Returns:

the construct type

getDocstring

public final java.lang.String getDocstring()

Always returns null

Specified by:

getDocstring in interface Named

Returns:

null