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A collection of equivalence oracles
/* 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.oracle.equivalence;
import java.util.Collection;
import java.util.List;
import java.util.Random;
import java.util.stream.Stream;
import de.learnlib.api.oracle.EquivalenceOracle.DFAEquivalenceOracle;
import de.learnlib.api.oracle.EquivalenceOracle.MealyEquivalenceOracle;
import de.learnlib.api.oracle.MembershipOracle;
import de.learnlib.api.oracle.MembershipOracle.DFAMembershipOracle;
import de.learnlib.api.oracle.MembershipOracle.MealyMembershipOracle;
import de.learnlib.buildtool.refinement.annotation.GenerateRefinement;
import de.learnlib.buildtool.refinement.annotation.Generic;
import de.learnlib.buildtool.refinement.annotation.Interface;
import de.learnlib.buildtool.refinement.annotation.Map;
import net.automatalib.automata.concepts.Output;
import net.automatalib.automata.fsa.DFA;
import net.automatalib.automata.transducers.MealyMachine;
import net.automatalib.commons.util.collections.CollectionsUtil;
import net.automatalib.words.Word;
import net.automatalib.words.WordBuilder;
/**
* @author Maik Merten
*/
@GenerateRefinement(name = "DFARandomWordsEQOracle",
generics = "I",
parentGenerics = {@Generic(clazz = DFA.class, generics = {"?", "I"}),
@Generic("I"),
@Generic(clazz = Boolean.class)},
parameterMapping = @Map(from = MembershipOracle.class,
to = DFAMembershipOracle.class,
withGenerics = "I"),
interfaces = @Interface(clazz = DFAEquivalenceOracle.class, generics = "I"))
@GenerateRefinement(name = "MealyRandomWordsEQOracle",
generics = {"I", "O"},
parentGenerics = {@Generic(clazz = MealyMachine.class, generics = {"?", "I", "?", "O"}),
@Generic("I"),
@Generic(clazz = Word.class, generics = "O")},
parameterMapping = @Map(from = MembershipOracle.class,
to = MealyMembershipOracle.class,
withGenerics = {"I", "O"}),
interfaces = @Interface(clazz = MealyEquivalenceOracle.class, generics = {"I", "O"}))
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());
}
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 = CollectionsUtil.randomAccessList(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();
}
}