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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.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Random;
import java.util.stream.Stream;
import de.learnlib.api.oracle.MembershipOracle;
import net.automatalib.automata.concepts.Output;
import net.automatalib.automata.fsa.DFA;
import net.automatalib.automata.transout.MealyMachine;
import net.automatalib.words.Word;
import net.automatalib.words.WordBuilder;
/**
* @author Maik Merten
*/
public class RandomWordsEQOracle, I, D> extends AbstractTestWordEQOracle {
private final Random random;
private final int maxTests;
private final int minLength;
private final int maxLength;
public RandomWordsEQOracle(MembershipOracle mqOracle,
int minLength,
int maxLength,
int maxTests) {
this(mqOracle, minLength, maxLength, maxTests, new Random(), 1);
}
public RandomWordsEQOracle(MembershipOracle mqOracle,
int minLength,
int maxLength,
int maxTests,
Random random) {
this(mqOracle, minLength, maxLength, maxTests, random, 1);
}
public RandomWordsEQOracle(MembershipOracle mqOracle,
int minLength,
int maxLength,
int maxTests,
Random random,
int batchSize) {
super(mqOracle, batchSize);
this.maxTests = maxTests;
this.minLength = minLength;
this.maxLength = maxLength;
this.random = random;
}
@Override
protected Stream> generateTestWords(A hypothesis, Collection inputs) {
final List symbolList;
if (inputs instanceof List) {
symbolList = (List) inputs;
} else {
symbolList = new ArrayList<>(inputs);
}
return Stream.generate(() -> generateTestWord(symbolList, symbolList.size())).limit(maxTests);
}
private Word generateTestWord(List symbolList, int numSyms) {
final int length = minLength + random.nextInt((maxLength - minLength) + 1);
final WordBuilder result = new WordBuilder<>(length);
for (int j = 0; j < length; ++j) {
int symidx = random.nextInt(numSyms);
I sym = symbolList.get(symidx);
result.append(sym);
}
return result.toWord();
}
public static class DFARandomWordsEQOracle extends RandomWordsEQOracle, I, Boolean>
implements DFAEquivalenceOracle {
public DFARandomWordsEQOracle(MembershipOracle mqOracle,
int minLength,
int maxLength,
int maxTests,
Random random) {
super(mqOracle, minLength, maxLength, maxTests, random);
}
public DFARandomWordsEQOracle(MembershipOracle mqOracle,
int minLength,
int maxLength,
int maxTests,
Random random,
int batchSize) {
super(mqOracle, minLength, maxLength, maxTests, random, batchSize);
}
}
public static class MealyRandomWordsEQOracle extends RandomWordsEQOracle, I, Word>
implements MealyEquivalenceOracle {
public MealyRandomWordsEQOracle(MembershipOracle> mqOracle,
int minLength,
int maxLength,
int maxTests,
Random random) {
super(mqOracle, minLength, maxLength, maxTests, random);
}
public MealyRandomWordsEQOracle(MembershipOracle> mqOracle,
int minLength,
int maxLength,
int maxTests,
Random random,
int batchSize) {
super(mqOracle, minLength, maxLength, maxTests, random, batchSize);
}
}
}