burlap.mdp.core.action

Interface ActionType

All Known Implementing Classes:

BlocksWorld.StackActionType, BlocksWorld.UnstackActionType, GraphDefinedDomain.GraphActionType, LunarLanderDomain.ThrustType, ObjectParameterizedActionType, OptionType, RLGlueDomain.RLGlueActionType, UniversalActionType

public interface ActionType

An ActionType acts as a generator for Action objects. Its job is to define any preconditions for an Action, so that Action objects with unsatisfied preconditions for an input state are not generated in the state as well determine the set of valid parameterizations for a given input state. For example, in a BlocksWorld, the number of stack actions is dependent on the number of clear blocks, and blocks that are not clear cannot be stacked on other blocks because their precondition is not satisfied.

You can also use an ActionType to generate different parameterizations of an Action, even when the parameters are not state dependent, but it is usually not necessary to do so and you might instead consider creating a separate ActionType for each parameterization.

Author:

James MacGlashan

Method Summary

Modifier and Type	Method and Description
java.util.List<Action>	allApplicableActions(State s) Returns all possible actions of this type that can be applied in the provided State.
Action	associatedAction(java.lang.String strRep) Returns an Action whose parameters are specified by the given String representation (if the ActionType manages multiple parameterizations)
java.lang.String	typeName() The unique name of this ActionType

Method Detail

typeName

java.lang.String typeName()

The unique name of this ActionType

Returns:

unique String name of this ActionType

associatedAction

Action associatedAction(java.lang.String strRep)

Returns an Action whose parameters are specified by the given String representation (if the ActionType manages multiple parameterizations)

Parameters:

strRep - the String representation of the Action parameters, if any, or null if there are no parameters.

Returns:

the corresponding Action

allApplicableActions

java.util.List<Action> allApplicableActions(State s)

Returns all possible actions of this type that can be applied in the provided State.

Parameters:

s - the State in which all applicable actions of this ActionType object should be returned.

Returns:

a list of all applicable Actions of this ActionType object in in the given State