burlap.behavior.singleagent.planning.stochastic.montecarlo.uct

Class UCTStateNode

java.lang.Object

burlap.behavior.singleagent.planning.stochastic.montecarlo.uct.UCTStateNode

public class UCTStateNode
extends java.lang.Object

UCT State Node that wraps a hashed state object and provided additional state statistics necessary for UCT.

Author:

James MacGlashan

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	UCTStateNode.UCTStateConstructor A factory for generating UCTStateNode objects

Field Summary

Fields

Modifier and Type	Field and Description
java.util.List<UCTActionNode>	actionNodes The possible actions (nodes) that can be performed from this state.
int	depth The depth the UCT tree
int	n The number of times this node has been visited
HashableState	state The (hashed) state this node wraps

Constructor Summary

Constructors

Constructor and Description
UCTStateNode(HashableState s, int d, java.util.List<ActionType> actionTypes, UCTActionNode.UCTActionConstructor constructor) Initializes the UCT state node.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
int	hashCode()

Methods inherited from class java.lang.Object

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

Field Detail

state

public HashableState state

The (hashed) state this node wraps

depth

public int depth

The depth the UCT tree

n

public int n

The number of times this node has been visited

actionNodes

public java.util.List<UCTActionNode> actionNodes

The possible actions (nodes) that can be performed from this state.

Constructor Detail

UCTStateNode

public UCTStateNode(HashableState s,
                    int d,
                    java.util.List<ActionType> actionTypes,
                    UCTActionNode.UCTActionConstructor constructor)

Initializes the UCT state node.

Parameters:

s - the state that this node wraps

d - the depth of the node

actionTypes - the possible OO-MDP actions that can be taken

constructor - a UCTActionNode factory that can be used to create ActionNodes for each of the actions.

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object