burlap.behavior.singleagent.options.support

Class LocalSubgoalTF

java.lang.Object

burlap.behavior.singleagent.options.support.LocalSubgoalTF

All Implemented Interfaces:

TerminalFunction

public class LocalSubgoalTF
extends java.lang.Object
implements TerminalFunction

It is typical for options to be defined for following policies to subgoals and it is often useful to use a planning or learning algorithm to define these policies, in which case a terminal function for the option would need to be specified in order to learn or plan for its policy. This terminal function defines a set of states in which an option is applicable and the subgoal states of the option. The subgoal state and applicable states are specified using StateConditionTest objects. The agent will terminate in any subgoal state or any state that is not an applicable state.

Author:

James MacGlashan

Field Summary

Fields

Modifier and Type	Field and Description
protected StateConditionTest	applicableStateTest Defines the set of states in which the option is applicable
protected StateConditionTest	subgoalStateTest Defines he set of subgoal states for the option

Constructor Summary

Constructors

Constructor and Description
LocalSubgoalTF(StateConditionTest subgoalStateTest) Initializes with a set of subgoal states.
LocalSubgoalTF(StateConditionTest applicableStateTest, StateConditionTest subgoalStateTest) Initializes with a set of states in which the option is applicable and the options subgoal states.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isTerminal(State s)

Methods inherited from class java.lang.Object

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

Field Detail

applicableStateTest

protected StateConditionTest applicableStateTest

Defines the set of states in which the option is applicable

subgoalStateTest

protected StateConditionTest subgoalStateTest

Defines he set of subgoal states for the option

Constructor Detail

LocalSubgoalTF

public LocalSubgoalTF(StateConditionTest subgoalStateTest)

Initializes with a set of subgoal states. The option is assumed to be applicable everywhere.

Parameters:

subgoalStateTest - the subgoal states.

LocalSubgoalTF

public LocalSubgoalTF(StateConditionTest applicableStateTest,
              StateConditionTest subgoalStateTest)

Initializes with a set of states in which the option is applicable and the options subgoal states.

Parameters:

applicableStateTest - the states in which the option is applicable.

subgoalStateTest - the subgoal states

Method Detail

isTerminal

public boolean isTerminal(State s)

Specified by:

isTerminal in interface TerminalFunction