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A collection of emptiness oracles

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/* Copyright (C) 2013-2019 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.emptiness;

import java.util.Collection;

import javax.annotation.Nullable;
import javax.annotation.ParametersAreNonnullByDefault;

import de.learnlib.api.oracle.EmptinessOracle;
import de.learnlib.api.oracle.MembershipOracle;
import de.learnlib.api.query.DefaultQuery;
import de.learnlib.util.AbstractBFOracle;
import net.automatalib.automata.concepts.DetOutputAutomaton;

/**
 * An {@link EmptinessOracle} that tries words in a breadth-first manner.
 *
 * @param  the automaton type
 * @param  the input type
 * @param  the output type
 *
 * @author Jeroen Meijer
 */
@ParametersAreNonnullByDefault
abstract class AbstractBFEmptinessOracle, I, D>
        extends AbstractBFOracle implements EmptinessOracle {

    protected AbstractBFEmptinessOracle(MembershipOracle membershipOracle, double multiplier) {
        super(membershipOracle, multiplier);
    }

    @Override
    public boolean isCounterExample(A hypothesis, Iterable inputs, @Nullable D output) {
        return EmptinessOracle.super.isCounterExample(hypothesis, inputs, output);
    }

    @Nullable
    @Override
    public DefaultQuery findCounterExample(A hypothesis, Collection inputs) {
        return super.findCounterExample(hypothesis, inputs);
    }
}