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A collection of equivalence oracles
/* Copyright (C) 2013-2020 TU Dortmund
* This file is part of LearnLib, http://www.learnlib.de/.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package de.learnlib.oracle.equivalence;
import java.util.Collection;
import de.learnlib.api.oracle.EquivalenceOracle;
import de.learnlib.api.oracle.EquivalenceOracle.DFAEquivalenceOracle;
import de.learnlib.api.oracle.EquivalenceOracle.MealyEquivalenceOracle;
import de.learnlib.api.query.DefaultQuery;
import de.learnlib.buildtool.refinement.annotation.GenerateRefinement;
import de.learnlib.buildtool.refinement.annotation.Generic;
import de.learnlib.buildtool.refinement.annotation.Interface;
import de.learnlib.buildtool.refinement.annotation.Map;
import net.automatalib.automata.UniversalDeterministicAutomaton;
import net.automatalib.automata.concepts.Output;
import net.automatalib.automata.fsa.DFA;
import net.automatalib.automata.transducers.MealyMachine;
import net.automatalib.util.automata.Automata;
import net.automatalib.words.Word;
import org.checkerframework.checker.nullness.qual.Nullable;
@GenerateRefinement(name = "DFASimulatorEQOracle",
generics = "I",
parentGenerics = {@Generic(clazz = DFA.class, generics = {"?", "I"}),
@Generic("I"),
@Generic(clazz = Boolean.class)},
parameterMapping = @Map(from = UniversalDeterministicAutomaton.class,
to = DFA.class,
withGenerics = {"?", "I"}),
interfaces = @Interface(clazz = DFAEquivalenceOracle.class, generics = "I"))
@GenerateRefinement(name = "MealySimulatorEQOracle",
generics = {"I", "O"},
parentGenerics = {@Generic(clazz = MealyMachine.class, generics = {"?", "I", "?", "O"}),
@Generic("I"),
@Generic(clazz = Word.class, generics = "O")},
parameterMapping = @Map(from = UniversalDeterministicAutomaton.class,
to = MealyMachine.class,
withGenerics = {"?", "I", "?", "O"}),
interfaces = @Interface(clazz = MealyEquivalenceOracle.class, generics = {"I", "O"}))
public class SimulatorEQOracle, I, D>
implements EquivalenceOracle {
private final UniversalDeterministicAutomaton reference;
private final Output output;
public & Output> SimulatorEQOracle(R reference) {
this.reference = reference;
this.output = reference;
}
@Override
public @Nullable DefaultQuery findCounterExample(A hypothesis, Collection inputs) {
final Word sep = Automata.findSeparatingWord(reference, hypothesis, inputs);
if (sep == null) {
return null;
}
return new DefaultQuery<>(sep, output.computeOutput(sep));
}
}