de.learnlib.algorithms.lstar.dfa

Class ExtensibleLStarDFA<I>

java.lang.Object

de.learnlib.algorithms.lstar.AbstractLStar<A,I,D>

de.learnlib.algorithms.lstar.AbstractAutomatonLStar<A,I,D,S,T,SP,TP,AI>

de.learnlib.algorithms.lstar.AbstractExtensibleAutomatonLStar<net.automatalib.automata.fsa.DFA<?,I>,I,Boolean,Integer,Integer,Boolean,Void,net.automatalib.automata.fsa.impl.compact.CompactDFA<I>>

de.learnlib.algorithms.lstar.dfa.ExtensibleLStarDFA<I>

Type Parameters:

I - input symbol class.

All Implemented Interfaces:

GlobalSuffixFeature<I>, GlobalSuffixLearner<net.automatalib.automata.fsa.DFA<?,I>,I,Boolean>, ResumableLearner<AutomatonLStarState<I,Boolean,net.automatalib.automata.fsa.impl.compact.CompactDFA<I>,Integer>>, SupportsGrowingAlphabet<I>, LearningAlgorithm<net.automatalib.automata.fsa.DFA<?,I>,I,Boolean>, LearningAlgorithm.DFALearner<I>, ObservationTableFeature<I,Boolean>, OTLearner<net.automatalib.automata.fsa.DFA<?,I>,I,Boolean>, OTLearner.OTLearnerDFA<I>

Direct Known Subclasses:

ClassicLStarDFA, MalerPnueliDFA, RivestSchapireDFA

public class ExtensibleLStarDFA<I>
extends AbstractExtensibleAutomatonLStar<net.automatalib.automata.fsa.DFA<?,I>,I,Boolean,Integer,Integer,Boolean,Void,net.automatalib.automata.fsa.impl.compact.CompactDFA<I>>
implements OTLearner.OTLearnerDFA<I>

An implementation of Angluin's L* algorithm for learning DFAs, as described in the paper "Learning Regular Sets from Queries and Counterexamples".

Author:

Malte Isberner

Nested Class Summary

Nested classes/interfaces inherited from class de.learnlib.algorithms.lstar.AbstractExtensibleAutomatonLStar

AbstractExtensibleAutomatonLStar.BuilderDefaults

Nested classes/interfaces inherited from interface de.learnlib.datastructure.observationtable.OTLearner

OTLearner.OTLearnerDFA<I>, OTLearner.OTLearnerMealy<I,O>

Nested classes/interfaces inherited from interface de.learnlib.api.algorithm.LearningAlgorithm

LearningAlgorithm.DFALearner<I>, LearningAlgorithm.MealyLearner<I,O>

Nested classes/interfaces inherited from interface de.learnlib.api.algorithm.feature.GlobalSuffixLearner

GlobalSuffixLearner.GlobalSuffixLearnerDFA<I>, GlobalSuffixLearner.GlobalSuffixLearnerMealy<I,O>

Field Summary

Fields inherited from class de.learnlib.algorithms.lstar.AbstractExtensibleAutomatonLStar

cexHandler, closingStrategy, initialPrefixes, initialSuffixes

Fields inherited from class de.learnlib.algorithms.lstar.AbstractAutomatonLStar

internalHyp, stateInfos

Fields inherited from class de.learnlib.algorithms.lstar.AbstractLStar

alphabet, oracle, table

Constructor Summary

Constructors

Constructor and Description
ExtensibleLStarDFA(net.automatalib.words.Alphabet<I> alphabet, MembershipOracle<I,Boolean> oracle, List<net.automatalib.words.Word<I>> initialPrefixes, List<net.automatalib.words.Word<I>> initialSuffixes, ObservationTableCEXHandler<? super I,? super Boolean> cexHandler, ClosingStrategy<? super I,? super Boolean> closingStrategy)
ExtensibleLStarDFA(net.automatalib.words.Alphabet<I> alphabet, MembershipOracle<I,Boolean> oracle, List<net.automatalib.words.Word<I>> initialSuffixes, ObservationTableCEXHandler<? super I,? super Boolean> cexHandler, ClosingStrategy<? super I,? super Boolean> closingStrategy) Constructor.

Method Summary

Modifier and Type	Method and Description
protected net.automatalib.automata.fsa.DFA<?,I>	exposeInternalHypothesis()
protected net.automatalib.automata.concepts.SuffixOutput<I,Boolean>	hypothesisOutput()
protected List<net.automatalib.words.Word<I>>	initialSuffixes() Returns the list of initial suffixes which are used to initialize the table.
protected Boolean	stateProperty(ObservationTable<I,Boolean> table, Row<I> stateRow) Derives a state property from the corresponding row.
protected Void	transitionProperty(ObservationTable<I,Boolean> table, Row<I> stateRow, int inputIdx) Derives a transition property from the corresponding transition.

Methods inherited from class de.learnlib.algorithms.lstar.AbstractExtensibleAutomatonLStar

initialPrefixes, refineHypothesisInternal, selectClosingRows

Methods inherited from class de.learnlib.algorithms.lstar.AbstractAutomatonLStar

addAlphabetSymbol, createState, doRefineHypothesis, getHypothesisModel, resume, setTransition, startLearning, suspend, updateInternalHypothesis

Methods inherited from class de.learnlib.algorithms.lstar.AbstractLStar

addGlobalSuffixes, analyzeInconsistency, completeConsistentTable, getGlobalSuffixes, getObservationTable, incorporateCounterExample, refineHypothesis

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.learnlib.api.algorithm.LearningAlgorithm

getHypothesisModel, refineHypothesis, startLearning

Methods inherited from interface de.learnlib.datastructure.observationtable.ObservationTableFeature

getObservationTable

Constructor Detail

ExtensibleLStarDFA

public ExtensibleLStarDFA(net.automatalib.words.Alphabet<I> alphabet,
                          MembershipOracle<I,Boolean> oracle,
                          List<net.automatalib.words.Word<I>> initialSuffixes,
                          ObservationTableCEXHandler<? super I,? super Boolean> cexHandler,
                          ClosingStrategy<? super I,? super Boolean> closingStrategy)

Constructor.

Parameters:

alphabet - the learning alphabet.

oracle - the DFA oracle.

ExtensibleLStarDFA

public ExtensibleLStarDFA(net.automatalib.words.Alphabet<I> alphabet,
                          MembershipOracle<I,Boolean> oracle,
                          List<net.automatalib.words.Word<I>> initialPrefixes,
                          List<net.automatalib.words.Word<I>> initialSuffixes,
                          ObservationTableCEXHandler<? super I,? super Boolean> cexHandler,
                          ClosingStrategy<? super I,? super Boolean> closingStrategy)

Method Detail

initialSuffixes

protected List<net.automatalib.words.Word<I>> initialSuffixes()

Description copied from class: AbstractLStar

Returns the list of initial suffixes which are used to initialize the table.

Overrides:

initialSuffixes in class AbstractExtensibleAutomatonLStar<net.automatalib.automata.fsa.DFA<?,I>,I,Boolean,Integer,Integer,Boolean,Void,net.automatalib.automata.fsa.impl.compact.CompactDFA<I>>

Returns:

the list of initial suffixes.

exposeInternalHypothesis

protected net.automatalib.automata.fsa.DFA<?,I> exposeInternalHypothesis()

Specified by:

exposeInternalHypothesis in class AbstractAutomatonLStar<net.automatalib.automata.fsa.DFA<?,I>,I,Boolean,Integer,Integer,Boolean,Void,net.automatalib.automata.fsa.impl.compact.CompactDFA<I>>

stateProperty

protected Boolean stateProperty(ObservationTable<I,Boolean> table,
                                Row<I> stateRow)

Description copied from class: AbstractAutomatonLStar

Derives a state property from the corresponding row.

Specified by:

stateProperty in class AbstractAutomatonLStar<net.automatalib.automata.fsa.DFA<?,I>,I,Boolean,Integer,Integer,Boolean,Void,net.automatalib.automata.fsa.impl.compact.CompactDFA<I>>

Parameters:

table - the current observation table

stateRow - the row for which the state is created

Returns:

the state property of the corresponding state

transitionProperty

protected Void transitionProperty(ObservationTable<I,Boolean> table,
                                  Row<I> stateRow,
                                  int inputIdx)

Description copied from class: AbstractAutomatonLStar

Derives a transition property from the corresponding transition.

N.B.: Not the transition row is passed to this method, but the row for the outgoing state. The transition row can be retrieved using Row.getSuccessor(int).

Specified by:

transitionProperty in class AbstractAutomatonLStar<net.automatalib.automata.fsa.DFA<?,I>,I,Boolean,Integer,Integer,Boolean,Void,net.automatalib.automata.fsa.impl.compact.CompactDFA<I>>

stateRow - the row for the source state

inputIdx - the index of the input symbol to consider

Returns:

the transition property of the corresponding transition

hypothesisOutput

protected net.automatalib.automata.concepts.SuffixOutput<I,Boolean> hypothesisOutput()

Specified by:

hypothesisOutput in class AbstractLStar<net.automatalib.automata.fsa.DFA<?,I>,I,Boolean>