Package edu.tufts.hrilab.action.selector

Class ActionSelector

java.lang.Object

edu.tufts.hrilab.action.selector.ActionSelector

Direct Known Subclasses:

GoalPlanningActionSelector, MCTSActionSelector, PreconditionPlanningSelector, RandomActionSelector, TypedActionSelector, UtilitarianActionSelector

public abstract class ActionSelector
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
protected static final org.slf4j.Logger	log

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ActionSelector()	Protected to prevent instantiation except by subclasses.

Method Summary

Modifier and Type	Method	Description
protected static final List<ParameterizedAction>	getCandidateActions(Goal goal, ActionConstraints constraints, StateMachine stateMachine)	this can be used by action selectors (subclasses) get all of the currently available actions that satisfy a goal
static ActionSelector	getInstance()	Get the action selector instance.
ActionDBEntry	selectActionForCommand(Symbol actor, String command, List<String> inputArguments, ActionConstraints constraints, StateMachine stateMachine)
abstract ParameterizedAction	selectActionForGoal(Goal goal, ActionConstraints constraints, StateMachine stateMachine)	the main job of action selectors (subclasses) is to implement this function
static boolean	setActionSelectorType(Class<? extends ActionSelector> type)	Set the action selector type.
static void	setActionSelectorType(String type)	Helper method to convert string form of ActionSelector type (e.g., classpath) into a Class object and set the ActionSelector type.

Methods inherited from class java.lang.Object

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

Field Details

log

protected static final org.slf4j.Logger log

Constructor Details

ActionSelector

protected ActionSelector()

Protected to prevent instantiation except by subclasses.

Method Details

getInstance

public static ActionSelector getInstance()

Get the action selector instance.

Returns:

the singleton instance of an actionSelector

setActionSelectorType

public static void setActionSelectorType(String type)

Helper method to convert string form of ActionSelector type (e.g., classpath) into a Class object and set the ActionSelector type.

Parameters:

type -

setActionSelectorType

public static boolean setActionSelectorType(Class<? extends ActionSelector> type)

Set the action selector type.

Parameters:

type - the action selector to use, a subclass of this class

Returns:

success / failure (it can't be set after instance has been constructed)

getCandidateActions

protected static final List<ParameterizedAction> getCandidateActions(Goal goal,
 ActionConstraints constraints,
 StateMachine stateMachine)

this can be used by action selectors (subclasses) get all of the currently available actions that satisfy a goal

Parameters:

goal - the goal to be satisfied by returned actions

Returns:

list of actions that accomplish the goal

selectActionForGoal

public abstract ParameterizedAction selectActionForGoal(Goal goal,
 ActionConstraints constraints,
 StateMachine stateMachine)

the main job of action selectors (subclasses) is to implement this function

Parameters:

goal - the goal that the selected action should accomplish

constraints - a returned goal should satisfy any constraints

stateMachine - in case the action selector cares about the state

Returns:

an action that accomplishes goal, satisfies constraints

selectActionForCommand

public ActionDBEntry selectActionForCommand(Symbol actor,
 String command,
 List<String> inputArguments,
 ActionConstraints constraints,
 StateMachine stateMachine)