org.metacsp.fuzzyAllenInterval

Class FuzzyAllenIntervalConstraint

java.lang.Object

org.metacsp.framework.Constraint

org.metacsp.framework.BinaryConstraint

org.metacsp.time.qualitative.QualitativeAllenIntervalConstraint

org.metacsp.fuzzyAllenInterval.FuzzyAllenIntervalConstraint

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class FuzzyAllenIntervalConstraint
extends QualitativeAllenIntervalConstraint

This class represents fuzzy Allen Interval constraints. Each constraint is a fuzzy set of the 13 Allen temporal relations, where each relation has an associated possibility degree. A FuzzyAllenIntervalConstraint is created by specifying an initial possibility degree for a subset of the 13 relations. The possibility degree of all other relations is calculated according to Freksa's conceptual neighborhood (see the DELTAS enum for alpha-cuts defining how possibility is assigned to neighbors).

Author:

Masoumeh Mansouri

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.metacsp.time.qualitative.QualitativeAllenIntervalConstraint

QualitativeAllenIntervalConstraint.Type

Field Summary

Fields

Modifier and Type	Field and Description
static double[]	DELTAS Array defining how possibility decreases with distance in Freksa's neighborhood.
static int[][]	freksa_neighbor The transition table used for computing Freksa neighborhoods.

Fields inherited from class org.metacsp.time.qualitative.QualitativeAllenIntervalConstraint

topologicalClosure, transitionTable, types

Fields inherited from class org.metacsp.framework.Constraint

annotation, autoRemovable, color, id, logger, masked, numIDs, scope

Constructor Summary

Constructors

Constructor and Description
FuzzyAllenIntervalConstraint(QualitativeAllenIntervalConstraint.Type... types) Create a FuzzyAllenIntervalConstraint given an array of constraint types whose desired possibility is 1.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone()
java.util.HashMap<QualitativeAllenIntervalConstraint.Type,java.lang.Double>	getCrispInverse()
java.util.HashMap<QualitativeAllenIntervalConstraint.Type,java.lang.Double>	getInversePossibilities() Get the possibilities of all inverse relations.
java.util.HashMap<QualitativeAllenIntervalConstraint.Type,java.lang.Double>	getPossibilities() Get current possibilities of all Allen relations (types).
static double	getPossibilityDegree(int distance) Get the possibility degree of relations at a given distance (in Freksa's neighborhood).
boolean	isEquivalent(Constraint c) Method for assessing the "equivalence" between two constraints.
java.util.HashMap<QualitativeAllenIntervalConstraint.Type,java.lang.Double>	makeCrispRel()

Methods inherited from class org.metacsp.time.qualitative.QualitativeAllenIntervalConstraint

containsType, getAllenConvexClosure, getDimension, getEdgeLabel, getInverseRelation, getInverseRelation, getTypes, isPreconvex, lookupTypeByInt, setTypes

Methods inherited from class org.metacsp.framework.BinaryConstraint

getFrom, getTo, setFrom, setTo, toString

Methods inherited from class org.metacsp.framework.Constraint

getAnnotation, getColor, getDescription, getID, getScope, isAutoRemovable, isMasked, isSkippableSolver, isUnary, mask, setAnnotation, setAutoRemovable, setColor, setScope, skipSolver, unmask

Methods inherited from class java.lang.Object

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

Field Detail

freksa_neighbor

public static int[][] freksa_neighbor

The transition table used for computing Freksa neighborhoods.

DELTAS

public static double[] DELTAS

Array defining how possibility decreases with distance in Freksa's neighborhood.

Constructor Detail

FuzzyAllenIntervalConstraint

public FuzzyAllenIntervalConstraint(QualitativeAllenIntervalConstraint.Type... types)

Create a FuzzyAllenIntervalConstraint given an array of constraint types whose desired possibility is 1.

Parameters:

types -

Method Detail

getPossibilities

public java.util.HashMap<QualitativeAllenIntervalConstraint.Type,java.lang.Double> getPossibilities()

Get current possibilities of all Allen relations (types).

Returns:

The current possibilities of all Allen relations.

makeCrispRel

public java.util.HashMap<QualitativeAllenIntervalConstraint.Type,java.lang.Double> makeCrispRel()

getInversePossibilities

public java.util.HashMap<QualitativeAllenIntervalConstraint.Type,java.lang.Double> getInversePossibilities()

Get the possibilities of all inverse relations.

Returns:

The possibilities of all inverse relations

getCrispInverse

public java.util.HashMap<QualitativeAllenIntervalConstraint.Type,java.lang.Double> getCrispInverse()

clone

public java.lang.Object clone()

Overrides:

clone in class QualitativeAllenIntervalConstraint

getPossibilityDegree

public static double getPossibilityDegree(int distance)

Get the possibility degree of relations at a given distance (in Freksa's neighborhood).

Parameters:

distance - The distance at which to get the possibility degree.

Returns:

The possibility degree of relations at the given distance (in Freksa's neighborhood).

isEquivalent

public boolean isEquivalent(Constraint c)

Description copied from class: Constraint

Method for assessing the "equivalence" between two constraints. This is not used for lookups nor comparisons (hence, it is not the equals method).

Overrides:

isEquivalent in class QualitativeAllenIntervalConstraint

Parameters:

c - The Constraint to compare against.

Returns:

true iff the two constraints are considered to be equivalent.