de.learnlib.oracle.equivalence.vpda.SimulatorEQOracle Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of learnlib-equivalence-oracles Show documentation
Show all versions of learnlib-equivalence-oracles Show documentation
A collection of equivalence oracles
/* Copyright (C) 2013-2018 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.vpda;
import java.util.Collection;
import de.learnlib.api.oracle.EquivalenceOracle;
import de.learnlib.api.query.DefaultQuery;
import net.automatalib.automata.vpda.OneSEVPA;
import net.automatalib.util.automata.Automata;
import net.automatalib.words.VPDAlphabet;
import net.automatalib.words.Word;
/**
* An equivalence oracle based on the computation of a separating word for a given hypothesis and a previously known
* target system.
*
* @author frohme
*/
public class SimulatorEQOracle implements EquivalenceOracle, I, Boolean> {
private final OneSEVPA reference;
private final VPDAlphabet alphabet;
public SimulatorEQOracle(final OneSEVPA reference, final VPDAlphabet alphabet) {
this.reference = reference;
this.alphabet = alphabet;
}
@Override
public DefaultQuery findCounterExample(final OneSEVPA hypothesis,
final Collection inputs) {
final Word sep = Automata.findSeparatingWord(reference, hypothesis, alphabet);
if (sep == null) {
return null;
}
return new DefaultQuery<>(sep, reference.computeOutput(sep));
}
}