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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;
import java.util.Collection;
import java.util.stream.Stream;
import com.google.common.collect.Streams;
import de.learnlib.api.oracle.MembershipOracle;
import net.automatalib.automata.UniversalDeterministicAutomaton;
import net.automatalib.automata.concepts.Output;
import net.automatalib.automata.fsa.DFA;
import net.automatalib.automata.transout.MealyMachine;
import net.automatalib.util.automata.conformance.WpMethodTestsIterator;
import net.automatalib.words.Word;
/**
* Implements an equivalence test by applying the Wp-method test on the given hypothesis automaton, as described in
* "Test Selection Based on Finite State Models" by S. Fujiwara et al.
*
* @param
* automaton type
* @param
* input symbol type
* @param
* output domain type
*
* @author Malte Isberner
*/
public class WpMethodEQOracle & Output, I, D>
extends AbstractTestWordEQOracle {
private final int maxDepth;
/**
* Constructor.
*
* @param sulOracle
* interface to the system under learning
* @param maxDepth
* the maximum length of the "middle" part of the test cases
*/
public WpMethodEQOracle(MembershipOracle sulOracle, int maxDepth) {
this(sulOracle, maxDepth, 1);
}
/**
* Constructor.
* @param sulOracle
* interface to the system under learning
* @param maxDepth
* the maximum length of the "middle" part of the test cases
* @param batchSize
* size of the batches sent to the membership oracle
*/
public WpMethodEQOracle(MembershipOracle sulOracle, int maxDepth, int batchSize) {
super(sulOracle, batchSize);
this.maxDepth = maxDepth;
}
@Override
protected Stream> generateTestWords(A hypothesis, Collection inputs) {
return Streams.stream(new WpMethodTestsIterator<>(hypothesis, inputs, maxDepth));
}
public static class DFAWpMethodEQOracle extends WpMethodEQOracle, I, Boolean>
implements DFAEquivalenceOracle {
public DFAWpMethodEQOracle(MembershipOracle sulOracle, int maxDepth) {
super(sulOracle, maxDepth);
}
public DFAWpMethodEQOracle(MembershipOracle sulOracle, int maxDepth, int batchSize) {
super(sulOracle, maxDepth, batchSize);
}
}
public static class MealyWpMethodEQOracle extends WpMethodEQOracle, I, Word> {
public MealyWpMethodEQOracle(MembershipOracle> sulOracle, int maxDepth) {
super(sulOracle, maxDepth);
}
public MealyWpMethodEQOracle(MembershipOracle> sulOracle, int maxDepth, int batchSize) {
super(sulOracle, maxDepth, batchSize);
}
}
}