aima.core.environment.vacuum

Class VacuumEnvironment

java.lang.Object

aima.core.agent.impl.AbstractEnvironment

aima.core.environment.vacuum.VacuumEnvironment

All Implemented Interfaces:

Environment, EnvironmentViewNotifier

Direct Known Subclasses:

NondeterministicVacuumEnvironment

public class VacuumEnvironment
extends AbstractEnvironment

Artificial Intelligence A Modern Approach (3rd Edition): pg 58.

Let the world contain just two locations. Each location may or may not contain dirt, and the agent may be in one location or the other. There are 8 possible world states, as shown in Figure 3.2. The agent has three possible actions in this version of the vacuum world: Left, Right, and Suck. Assume for the moment, that sucking is 100% effective. The goal is to clean up all the dirt.

Author:

Ravi Mohan, Ciaran O'Reilly, Mike Stampone

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	VacuumEnvironment.LocationState

Field Summary

Fields

Modifier and Type	Field and Description
static Action	ACTION_MOVE_LEFT
static Action	ACTION_MOVE_RIGHT
static Action	ACTION_SUCK
protected VacuumEnvironmentState	envState
protected boolean	isDone
static java.lang.String	LOCATION_A
static java.lang.String	LOCATION_B

Fields inherited from class aima.core.agent.impl.AbstractEnvironment

agents, envObjects, performanceMeasures, views

Constructor Summary

Constructors

Constructor and Description
VacuumEnvironment() Constructs a vacuum environment with two locations, in which dirt is placed at random.
VacuumEnvironment(VacuumEnvironment.LocationState locAState, VacuumEnvironment.LocationState locBState) Constructs a vacuum environment with two locations, in which dirt is placed as specified.

Method Summary

Modifier and Type	Method and Description
void	addAgent(Agent a) Add an agent to the Environment.
void	addAgent(Agent a, java.lang.String location)
void	executeAction(Agent a, Action agentAction)
java.lang.String	getAgentLocation(Agent a)
EnvironmentState	getCurrentState()
java.util.List<java.lang.String>	getLocations()
VacuumEnvironment.LocationState	getLocationState(java.lang.String location)
Percept	getPerceptSeenBy(Agent anAgent)
boolean	isDone() Returns true if the Environment is finished with its current task(s).

Methods inherited from class aima.core.agent.impl.AbstractEnvironment

addEnvironmentObject, addEnvironmentView, createExogenousChange, getAgents, getEnvironmentObjects, getPerformanceMeasure, notifyEnvironmentViews, notifyEnvironmentViews, notifyViews, removeAgent, removeEnvironmentObject, removeEnvironmentView, step, step, stepUntilDone, updatePerformanceMeasure

Methods inherited from class java.lang.Object

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

Field Detail

ACTION_MOVE_LEFT

public static final Action ACTION_MOVE_LEFT

ACTION_MOVE_RIGHT

public static final Action ACTION_MOVE_RIGHT

ACTION_SUCK

public static final Action ACTION_SUCK

LOCATION_A

public static final java.lang.String LOCATION_A

See Also:

Constant Field Values

LOCATION_B

public static final java.lang.String LOCATION_B

See Also:

Constant Field Values

envState

protected VacuumEnvironmentState envState

isDone

protected boolean isDone

Constructor Detail

VacuumEnvironment

public VacuumEnvironment()

Constructs a vacuum environment with two locations, in which dirt is placed at random.

VacuumEnvironment

public VacuumEnvironment(VacuumEnvironment.LocationState locAState,
                         VacuumEnvironment.LocationState locBState)

Constructs a vacuum environment with two locations, in which dirt is placed as specified.

Parameters:

locAState - the initial state of location A, which is either Clean or Dirty.

locBState - the initial state of location B, which is either Clean or Dirty.

Method Detail

getCurrentState

public EnvironmentState getCurrentState()

getLocations

public java.util.List<java.lang.String> getLocations()

executeAction

public void executeAction(Agent a,
                          Action agentAction)

Specified by:

executeAction in class AbstractEnvironment

getPerceptSeenBy

public Percept getPerceptSeenBy(Agent anAgent)

Specified by:

getPerceptSeenBy in class AbstractEnvironment

isDone

public boolean isDone()

Description copied from interface: Environment

Returns true if the Environment is finished with its current task(s).

Specified by:

isDone in interface Environment

Overrides:

isDone in class AbstractEnvironment

Returns:

true if the Environment is finished with its current task(s).

addAgent

public void addAgent(Agent a)

Description copied from interface: Environment

Add an agent to the Environment.

Specified by:

addAgent in interface Environment

Overrides:

addAgent in class AbstractEnvironment

Parameters:

a - the agent to be added.

addAgent

public void addAgent(Agent a,
                     java.lang.String location)

getLocationState

public VacuumEnvironment.LocationState getLocationState(java.lang.String location)

getAgentLocation

public java.lang.String getAgentLocation(Agent a)