Package fr.uga.pddl4j.heuristics.state

Class AbstractStateHeuristic

java.lang.Object

fr.uga.pddl4j.heuristics.AbstractHeuristic

fr.uga.pddl4j.heuristics.state.AbstractStateHeuristic

All Implemented Interfaces:

Heuristic, StateHeuristic, Serializable

Direct Known Subclasses:

GraphHeuristic, RelaxedGraphHeuristic

public abstract class AbstractStateHeuristic
extends AbstractHeuristic
implements StateHeuristic

This abstract class implements the basic methods of goal cost heuristics.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface fr.uga.pddl4j.heuristics.state.StateHeuristic

StateHeuristic.Name

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractStateHeuristic(Problem problem)	Create a new goal cost heuristic for a specified planning problem.

Method Summary

Modifier and Type	Method	Description
protected List<Action>	getActions()	Returns the actions of the relaxed problem to solve in order to compute the heuristic.
protected Condition	getGoal()	Returns the goal of the problem to solve in order to compute the heuristic.
protected List<Fluent>	getRevelantFacts()	Returns the relevant facts of the relaxed problem to solve in order to compute the heuristic.
boolean	isAdmissible()	Returns true if this heuristic is admissible.
protected void	setAdmissible(boolean isAdmissible)	Marks the cost cost heuristic as admissible or not.
protected void	setGoal(Condition goal)	Set the goal of the relaxed problem to solve in order to compute the heuristic.

Methods inherited from class java.lang.Object

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

Methods inherited from interface fr.uga.pddl4j.heuristics.state.StateHeuristic

estimate, estimate

Constructor Details

AbstractStateHeuristic

protected AbstractStateHeuristic(Problem problem)

Create a new goal cost heuristic for a specified planning problem. By default the heuristic is considered as admissible.

Parameters:

problem - the problem to solve.

Method Details

isAdmissible

public boolean isAdmissible()

Returns true if this heuristic is admissible.

Specified by:

isAdmissible in interface StateHeuristic

Returns:

true if this heuristic is admissible.

setAdmissible

protected final void setAdmissible(boolean isAdmissible)

Marks the cost cost heuristic as admissible or not.

Parameters:

isAdmissible - the admissible flag.

getGoal

protected final Condition getGoal()

Returns the goal of the problem to solve in order to compute the heuristic.

Returns:

the goal.

setGoal

protected void setGoal(Condition goal)

Set the goal of the relaxed problem to solve in order to compute the heuristic.

Parameters:

goal - the goal.

getRevelantFacts

protected final List<Fluent> getRevelantFacts()

Returns the relevant facts of the relaxed problem to solve in order to compute the heuristic.

Returns:

the relevant facts.

getActions

protected final List<Action> getActions()

Returns the actions of the relaxed problem to solve in order to compute the heuristic.

Returns:

the actions.