Package edu.uky.ai.planning

Class Step

java.lang.Object

edu.uky.ai.planning.Step

All Implemented Interfaces:

Comparable<Step>

public class Step
extends Object
implements Comparable<Step>

A step is a single ground action in a plan which changes the world's state.

Author:

Stephen G. Ware

Field Summary

Fields

Modifier and Type	Field	Description
final Proposition	effect	What becomes true after the step has been taken
final String	name	The name of the step
final Proposition	precondition	What must be true before the step can be taken

Constructor Summary

Constructors

Constructor	Description
Step(String name, Proposition precondition, Proposition effect)	Constructs a new step.

Method Summary

Modifier and Type	Method	Description
int	compareTo(Step other)
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

name

public final String name

The name of the step

precondition

public final Proposition precondition

What must be true before the step can be taken

effect

public final Proposition effect

What becomes true after the step has been taken

Constructor Details

Step

public Step(String name,
 Proposition precondition,
 Proposition effect)

Constructs a new step.

Parameters:

name - the name of the step

precondition - the precondition (must be ground)

effect - the effect (must be ground)

Throws:

IllegalArgumentException - if either the precodition or effect are not ground

Method Details

toString

public String toString()

Overrides:

toString in class Object

compareTo

public int compareTo(Step other)

Specified by:

compareTo in interface Comparable<Step>