6433387082

Committed 06 Oct 2023 03:10PM UTC coverage: 92.296% (-0.007%) from 92.303%

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update Falk's developer id

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/oracles/equivalence-oracles/src/main/java/de/learnlib/oracle/equivalence/sba/WMethodEQOracle.java

/* Copyright (C) 2013-2023 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.sba;

import java.util.Collection;
import java.util.stream.Stream;

import com.google.common.collect.Streams;
import de.learnlib.api.oracle.MembershipOracle;
import de.learnlib.oracle.equivalence.AbstractTestWordEQOracle;
import net.automatalib.automata.concepts.FiniteRepresentation;
import net.automatalib.automata.procedural.SBA;
import net.automatalib.util.automata.conformance.SBAWMethodTestsIterator;
import net.automatalib.util.automata.conformance.WMethodTestsIterator;
import net.automatalib.words.ProceduralInputAlphabet;
import net.automatalib.words.Word;

/**
 * An {@link SBA} version of {@link de.learnlib.oracle.equivalence.WMethodEQOracle} which generates test sequences based
 * on the {@link SBAWMethodTestsIterator W-method} for each procedure.
 *
 * @param <I>
 *         input symbol type
 */
public class WMethodEQOracle<I> extends AbstractTestWordEQOracle<SBA<?, I>, I, Boolean> {

    private final int lookahead;
    private final int expectedSize;

    /**
     * Constructor. Convenience method for {@link #WMethodEQOracle(MembershipOracle, int, int)} that sets
     * {@code expectedSize} to 0.
     *
     * @param sulOracle
     *         interface to the system under learning
     * @param lookahead
     *         the maximum length of the "middle" part of the test cases
     */
    public WMethodEQOracle(MembershipOracle<I, Boolean> sulOracle, int lookahead) {
        this(sulOracle, lookahead, 0);
    }

    /**
     * Constructor. Convenience method for {@link #WMethodEQOracle(MembershipOracle, int, int, int)} that sets
     * {@code batchSize} to 1.
     *
     * @param sulOracle
     *         interface to the system under learning
     * @param lookahead
     *         the (minimal) maximum length of the "middle" part of the test cases
     * @param expectedSize
     *         the expected size of the system under learning
     */
    public WMethodEQOracle(MembershipOracle<I, Boolean> sulOracle, int lookahead, int expectedSize) {
        this(sulOracle, lookahead, expectedSize, 1);
    }

    /**
     * Constructor. Uses
     * {@link Math#max(int, int) Math.max}{@code (lookahead, expectedSize - }{@link FiniteRepresentation#size()
     * hypothesis.size()}{@code )} to determine the maximum length of sequences, that should be appended to the
     * transition-cover part of the test sequence to account for the fact that the system under learning may have more
     * states than the current hypothesis.
     *
     * @param sulOracle
     *         interface to the system under learning
     * @param lookahead
     *         the (minimal) maximum length of the "middle" part of the test cases
     * @param expectedSize
     *         the expected size of the system under learning
     * @param batchSize
     *         size of the batches sent to the membership oracle
     *
     * @see WMethodTestsIterator
     */
    public WMethodEQOracle(MembershipOracle<I, Boolean> sulOracle, int lookahead, int expectedSize, int batchSize) {
        super(sulOracle, batchSize);
        this.lookahead = lookahead;
        this.expectedSize = expectedSize;
    }

    @Override
    protected Stream<Word<I>> generateTestWords(SBA<?, I> hypothesis, Collection<? extends I> inputs) {
        if (!(inputs instanceof ProceduralInputAlphabet)) {
            throw new IllegalArgumentException("Inputs are not a procedural alphabet");
        }

        @SuppressWarnings("unchecked")
        final ProceduralInputAlphabet<I> alphabet = (ProceduralInputAlphabet<I>) inputs;

        return Streams.stream(new SBAWMethodTestsIterator<>(hypothesis,
                                                            alphabet,
                                                            Math.max(lookahead, expectedSize - hypothesis.size())));
    }
}

1	/* Copyright (C) 2013-2023 TU Dortmund
2	* This file is part of LearnLib, http://www.learnlib.de/.
3	*
4	* Licensed under the Apache License, Version 2.0 (the "License");
5	* you may not use this file except in compliance with the License.
6	* You may obtain a copy of the License at
7	*
8	* http://www.apache.org/licenses/LICENSE-2.0
9	*
10	* Unless required by applicable law or agreed to in writing, software
11	* distributed under the License is distributed on an "AS IS" BASIS,
12	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13	* See the License for the specific language governing permissions and
14	* limitations under the License.
15	*/
16	package de.learnlib.oracle.equivalence.sba;
17
18	import java.util.Collection;
19	import java.util.stream.Stream;
20
21	import com.google.common.collect.Streams;
22	import de.learnlib.api.oracle.MembershipOracle;
23	import de.learnlib.oracle.equivalence.AbstractTestWordEQOracle;
24	import net.automatalib.automata.concepts.FiniteRepresentation;
25	import net.automatalib.automata.procedural.SBA;
26	import net.automatalib.util.automata.conformance.SBAWMethodTestsIterator;
27	import net.automatalib.util.automata.conformance.WMethodTestsIterator;
28	import net.automatalib.words.ProceduralInputAlphabet;
29	import net.automatalib.words.Word;
30
31	/**
32	* An {@link SBA} version of {@link de.learnlib.oracle.equivalence.WMethodEQOracle} which generates test sequences based
33	* on the {@link SBAWMethodTestsIterator W-method} for each procedure.
34	*
35	* @param <I>
36	* input symbol type
37	*/
38	public class WMethodEQOracle<I> extends AbstractTestWordEQOracle<SBA<?, I>, I, Boolean> {
39
40	private final int lookahead;
41	private final int expectedSize;
42
43	/**
44	* Constructor. Convenience method for {@link #WMethodEQOracle(MembershipOracle, int, int)} that sets
45	* {@code expectedSize} to 0.
46	*
47	* @param sulOracle
48	* interface to the system under learning
49	* @param lookahead
50	* the maximum length of the "middle" part of the test cases
51	*/
52	public WMethodEQOracle(MembershipOracle<I, Boolean> sulOracle, int lookahead) {
53	this(sulOracle, lookahead, 0);	2✔
54	}	2✔
55
56	/**
57	* Constructor. Convenience method for {@link #WMethodEQOracle(MembershipOracle, int, int, int)} that sets
58	* {@code batchSize} to 1.
59	*
60	* @param sulOracle
61	* interface to the system under learning
62	* @param lookahead
63	* the (minimal) maximum length of the "middle" part of the test cases
64	* @param expectedSize
65	* the expected size of the system under learning
66	*/
67	public WMethodEQOracle(MembershipOracle<I, Boolean> sulOracle, int lookahead, int expectedSize) {
68	this(sulOracle, lookahead, expectedSize, 1);	2✔
69	}	2✔
70
71	/**
72	* Constructor. Uses
73	* {@link Math#max(int, int) Math.max}{@code (lookahead, expectedSize - }{@link FiniteRepresentation#size()
74	* hypothesis.size()}{@code )} to determine the maximum length of sequences, that should be appended to the
75	* transition-cover part of the test sequence to account for the fact that the system under learning may have more
76	* states than the current hypothesis.
77	*
78	* @param sulOracle
79	* interface to the system under learning
80	* @param lookahead
81	* the (minimal) maximum length of the "middle" part of the test cases
82	* @param expectedSize
83	* the expected size of the system under learning
84	* @param batchSize
85	* size of the batches sent to the membership oracle
86	*
87	* @see WMethodTestsIterator
88	*/
89	public WMethodEQOracle(MembershipOracle<I, Boolean> sulOracle, int lookahead, int expectedSize, int batchSize) {
90	super(sulOracle, batchSize);	2✔
91	this.lookahead = lookahead;	2✔
92	this.expectedSize = expectedSize;	2✔
93	}	2✔
94
95	@Override
96	protected Stream<Word<I>> generateTestWords(SBA<?, I> hypothesis, Collection<? extends I> inputs) {
97	if (!(inputs instanceof ProceduralInputAlphabet)) {	2✔
98	throw new IllegalArgumentException("Inputs are not a procedural alphabet");	×
99	}
100
101	@SuppressWarnings("unchecked")
102	final ProceduralInputAlphabet<I> alphabet = (ProceduralInputAlphabet<I>) inputs;	2✔
103
104	return Streams.stream(new SBAWMethodTestsIterator<>(hypothesis,	2✔
105	alphabet,
106	Math.max(lookahead, expectedSize - hypothesis.size())));	2✔
107	}
108	}

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