net.sf.tweety.arg.prob.syntax

Class ProbabilisticArgumentationFramework

java.lang.Object

net.sf.tweety.commons.BeliefSet<Argument>

net.sf.tweety.arg.dung.syntax.DungTheory

net.sf.tweety.arg.prob.syntax.ProbabilisticArgumentationFramework

All Implemented Interfaces:

java.lang.Comparable<DungTheory>, java.lang.Iterable<Argument>, java.util.Collection<Argument>, BeliefBase, Graph<Argument>

public class ProbabilisticArgumentationFramework
extends DungTheory

This class implements the probabilistic argumentation framework approach of [Li, Oren, Norman. Probabilistic Argumentation Frameworks. TAFA'2011].

Author:

Matthias Thimm

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Map<Argument,Probability>	argumentProbabilityAssignment Probability assignments to arguments (with independence assumption).
private java.util.Map<Attack,Probability>	attackProbabilityAssignment Probability assignments to attacks (with independence assumption).

Fields inherited from interface net.sf.tweety.graphs.Graph

IGNORE_SELFLOOPS, INVERT_SELFLOOPS, REMOVE_SELFLOOPS

Constructor Summary

Constructors

Constructor and Description
ProbabilisticArgumentationFramework() Default constructor; initializes empty sets of arguments and attacks
ProbabilisticArgumentationFramework(Graph<Argument> graph) Creates a new PAF from the given graph, all arguments and attacks have probability 1.

Method Summary

Modifier and Type	Method and Description
boolean	add(Argument a) Adds the given node to this graph.
boolean	add(Argument a, Probability p) Adds the given argument with the given probability
boolean	add(Attack att) Adds the given attack to this dung theory.
boolean	add(Attack att, Probability p) Adds the given attack with the given probability
Probability	getProbability(Argument a) Returns the probability of the given argument.
Probability	getProbability(Attack a) Returns the probability of the given attack.
Probability	getProbability(DungTheory aaf) Computes the probability of the given AAF wrt.
SubgraphProbabilityFunction	getSubgraphProbabilityFunction() Returns the complete subgraph probability function on the subgraphs of this PAF, assuming independence between probabilities of all arguments and attacks.
boolean	isWeightedGraph() Checks whether this graph only contains weighted edges.
boolean	remove(Argument a) Removes the argument and all its attacks
boolean	remove(Attack attack) Removes the given attack from this Dung theory.
DungTheory	sample() Samples a random DungTheory from this framework wrt.
java.lang.String	toString()

Methods inherited from class net.sf.tweety.arg.dung.syntax.DungTheory

add, add, addAllAttacks, addAttack, areAdjacent, compareTo, contains, containsAll, containsAttack, equals, existsDirectedPath, faf, getAdjancyMatrix, getAttacked, getAttackers, getAttacks, getChildren, getComplementGraph, getEdge, getEdges, getNeighbors, getNodes, getNumberOfNodes, getParents, getRestriction, getSignature, getStronglyConnectedComponents, getSubgraphs, hashCode, hasSelfLoops, isAttacked, isAttacked, isAttackedBy, isAttackedBy, isAttackingAllOtherArguments, isCoherent, isIndirectAttack, isRelativelyCoherent, isStable, isSupport, isWellFounded, prettyPrint, removeAll

Methods inherited from class net.sf.tweety.commons.BeliefSet

addAll, clear, instantiateSet, isEmpty, iterator, remove, retainAll, size, toArray, toArray

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.tweety.graphs.Graph

iterator

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface java.util.Collection

parallelStream, removeIf, spliterator, stream

Field Detail

argumentProbabilityAssignment

private java.util.Map<Argument,Probability> argumentProbabilityAssignment

Probability assignments to arguments (with independence assumption).

attackProbabilityAssignment

private java.util.Map<Attack,Probability> attackProbabilityAssignment

Probability assignments to attacks (with independence assumption).

Constructor Detail

ProbabilisticArgumentationFramework

public ProbabilisticArgumentationFramework()

Default constructor; initializes empty sets of arguments and attacks

ProbabilisticArgumentationFramework

public ProbabilisticArgumentationFramework(Graph<Argument> graph)

Creates a new PAF from the given graph, all arguments and attacks have probability 1.

Parameters:

graph - some graph

Method Detail

add

public boolean add(Attack att)

Description copied from class: DungTheory

Adds the given attack to this dung theory.

Overrides:

add in class DungTheory

Parameters:

att - an attack

Returns:

"true" if the set of attacks has been modified.

add

public boolean add(Attack att,
                   Probability p)

Adds the given attack with the given probability

Parameters:

att - some attack

p - some probability

Returns:

"true" iff this object was actually changed

add

public boolean add(Argument a)

Description copied from interface: Graph

Adds the given node to this graph.

Specified by:

add in interface java.util.Collection<Argument>

Specified by:

add in interface Graph<Argument>

Overrides:

add in class BeliefSet<Argument>

Parameters:

a - some node.

Returns:

"true" iff the edge has been added successfully.

add

public boolean add(Argument a,
                   Probability p)

Adds the given argument with the given probability

Parameters:

a - some argument

p - some probability

Returns:

"true" iff this object was actually changed

remove

public boolean remove(Attack attack)

Description copied from class: DungTheory

Removes the given attack from this Dung theory.

Overrides:

remove in class DungTheory

Parameters:

attack - an attack

Returns:

"true" if the set of attacks has been modified.

remove

public boolean remove(Argument a)

Description copied from class: DungTheory

Removes the argument and all its attacks

Overrides:

remove in class DungTheory

Parameters:

a - some argument

Returns:

true if this structure has been changed

getProbability

public Probability getProbability(Argument a)

Returns the probability of the given argument. If this framework does not contain the given argument, an IllegalArgumentException is thrown.

Parameters:

a - some argument

Returns:

the probability of the argument.

getProbability

public Probability getProbability(Attack a)

Returns the probability of the given attack. If this framework does not contain the given attack, an IllegalArgumentException is thrown.

Parameters:

a - some attack

Returns:

the probability of the attack.

getProbability

public Probability getProbability(DungTheory aaf)

Computes the probability of the given AAF wrt. this framework (if the given AAF is not a subgraph of this framework, it has probability zero).

Parameters:

aaf - some AAF (supposedly a subgraph of this framework)

Returns:

the probability of the given AAF.

getSubgraphProbabilityFunction

public SubgraphProbabilityFunction getSubgraphProbabilityFunction()

Returns the complete subgraph probability function on the subgraphs of this PAF, assuming independence between probabilities of all arguments and attacks.

Returns:

the subgraph probability function of this framework.

sample

public DungTheory sample()

Samples a random DungTheory from this framework wrt. the probabilities of its elements and assuming independence.

Returns:

a sampled DungTheory.

isWeightedGraph

public boolean isWeightedGraph()

Description copied from interface: Graph

Checks whether this graph only contains weighted edges.

Specified by:

isWeightedGraph in interface Graph<Argument>

Overrides:

isWeightedGraph in class DungTheory

Returns:

"true" if all edges are weighted in this graph.

toString

public java.lang.String toString()

Specified by:

toString in interface BeliefBase

Specified by:

toString in interface Graph<Argument>

Overrides:

toString in class DungTheory