de.learnlib.api.oracle.InclusionOracle Maven / Gradle / Ivy
/* 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.api.oracle;
import java.util.Objects;
import de.learnlib.api.SUL;
import net.automatalib.automata.concepts.Output;
import net.automatalib.automata.fsa.DFA;
import net.automatalib.automata.transducers.MealyMachine;
import net.automatalib.words.Word;
/**
* Decides whether the language of a given hypothesis is included in some other language (e.g. from a {@link SUL}. If
* the whole language is not included, it provides a counterexample, such that it is a word in the given hypothesis, and
* not in the other language.
*
* Note that from the perspective of a learner an inclusion oracle is also an equivalence oracle, but a poor one, i.e.
* an inclusion oracle only implements L(H) ⊆ L(SUL), not L(H) ⊇ L(SUL).
*
* @param
* the automaton type
* @param
* the input type
* @param
* the output type
*
* @author Jeroen Meijer
*/
public interface InclusionOracle , I, D> extends EquivalenceOracle {
default boolean isCounterExample(Output hypothesis, Iterable input, D output) {
return !Objects.equals(hypothesis.computeOutput(input), output);
}
interface DFAInclusionOracle extends InclusionOracle, I, Boolean>, DFAEquivalenceOracle {}
interface MealyInclusionOracle
extends InclusionOracle, I, Word>, MealyEquivalenceOracle {}
}