Package edu.uky.ai.planning.ps

Class CausalLink

java.lang.Object

edu.uky.ai.planning.ps.CausalLink

All Implemented Interfaces:

Partial

public class CausalLink
extends Object
implements Partial

A causal link describes how the effect of an earlier step (the tail) satisfied the precondition of a later step (the head).

Author:

Stephen G. Ware

Field Summary

Fields

Modifier and Type	Field	Description
final PartialStep	head	The later step
final Literal	label	The fact that is an effect of the tail and a precondition of the head
final PartialStep	tail	The earlier step

Constructor Summary

Constructors

Constructor	Description
CausalLink(PartialStep tail, Literal label, PartialStep head)	Constructs a new causal link with the given tail, label, and head.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object other)
int	hashCode()
String	toString()
String	toString(Substitution substitution)	Returns a string representation of this object in which all variables which have values in the given substitution have been replaced with those values.

Methods inherited from class java.lang.Object

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

Field Details

tail

public final PartialStep tail

The earlier step

label

public final Literal label

The fact that is an effect of the tail and a precondition of the head

head

public final PartialStep head

The later step

Constructor Details

CausalLink

public CausalLink(PartialStep tail,
 Literal label,
 PartialStep head)

Constructs a new causal link with the given tail, label, and head.

Parameters:

tail - the earlier step

label - the fact established

head - the later step

Method Details

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

toString

public String toString(Substitution substitution)

Description copied from interface: Partial

Returns a string representation of this object in which all variables which have values in the given substitution have been replaced with those values.

Specified by:

toString in interface Partial

Parameters:

substitution - a substitution which may contain values for variabels used in this object

Returns:

a string