jess
Class Context

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

All Implemented Interfaces:

java.io.Serializable

public class Context

extends java.lang.Object

implements java.io.Serializable

An execution context for Funcalls.

(C) 1998 E.J. Friedman-Hill and the Sandia Corporation

See Also:

Serialized Form

Method Summary

Rete	getEngine()
Fact	getFact() If this context represents a join network node from a rule LHS, this will return the right input of the node.
jess.LogicalNode	getLogicalSupportNode()
Token	getToken() If this context represents a join network node from a rule LHS, this will return the left input of the node.
Value	getVariable(java.lang.String name) Get the value of a variable
void	setVariable(java.lang.String name, Value value) Set a (possibly new) variable to some type and value
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

getToken

public final Token getToken()

If this context represents a join network node from a rule LHS, this will return the left input of the node.

Returns:

The Token

getFact

public final Fact getFact()

If this context represents a join network node from a rule LHS, this will return the right input of the node.

Returns:

The ValueVector form of a fact

getLogicalSupportNode

public final jess.LogicalNode getLogicalSupportNode()

getEngine

public final Rete getEngine()

Returns:

getVariable

public Value getVariable(java.lang.String name)
                  throws JessException

Get the value of a variable

Parameters:

name - The name of the variable with no leading '?' or '$' characters

Throws:

JessException - If the variable is undefined

setVariable

public void setVariable(java.lang.String name,
                        Value value)
                 throws JessException

Set a (possibly new) variable to some type and value

Parameters:

name - Name of the variable

value - The value of the variable

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object