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/spa/WpMethodEQOracle.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.spa;

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.fsa.DFA;
import net.automatalib.automata.procedural.SPA;
import net.automatalib.util.automata.conformance.SPATestsIterator;
import net.automatalib.util.automata.conformance.WMethodTestsIterator;
import net.automatalib.util.automata.conformance.WpMethodTestsIterator;
import net.automatalib.words.ProceduralInputAlphabet;
import net.automatalib.words.Word;

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

    private final int lookahead;
    private final int expectedSize;

    /**
     * Constructor. Convenience method for {@link #WpMethodEQOracle(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 WpMethodEQOracle(MembershipOracle<I, Boolean> sulOracle, int lookahead) {
        this(sulOracle, lookahead, 0);
    }

    /**
     * Constructor. Convenience method for {@link #WpMethodEQOracle(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 WpMethodEQOracle(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 DFA#size() hypothesis.size()}{@code
     * )} (for each procedural {@code hypothesis}) 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 WpMethodEQOracle(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(SPA<?, 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 SPATestsIterator<>(hypothesis,
                                                     alphabet,
                                                     (dfa, alph) -> new WpMethodTestsIterator<>(dfa,
                                                                                                alph,
                                                                                                Math.max(lookahead,
                                                                                                         expectedSize -
                                                                                                         dfa.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.spa;
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.fsa.DFA;
25	import net.automatalib.automata.procedural.SPA;
26	import net.automatalib.util.automata.conformance.SPATestsIterator;
27	import net.automatalib.util.automata.conformance.WMethodTestsIterator;
28	import net.automatalib.util.automata.conformance.WpMethodTestsIterator;
29	import net.automatalib.words.ProceduralInputAlphabet;
30	import net.automatalib.words.Word;
31
32	/**
33	* An {@link SPA} version of {@link de.learnlib.oracle.equivalence.WpMethodEQOracle} which generates test sequences
34	* based on the partial W-method for each procedure.
35	*
36	* @param <I>
37	* input symbol type
38	*/
39	public class WpMethodEQOracle<I> extends AbstractTestWordEQOracle<SPA<?, I>, I, Boolean> {
40
41	private final int lookahead;
42	private final int expectedSize;
43
44	/**
45	* Constructor. Convenience method for {@link #WpMethodEQOracle(MembershipOracle, int, int)} that sets
46	* {@code expectedSize} to 0.
47	*
48	* @param sulOracle
49	* interface to the system under learning
50	* @param lookahead
51	* the maximum length of the "middle" part of the test cases
52	*/
53	public WpMethodEQOracle(MembershipOracle<I, Boolean> sulOracle, int lookahead) {
54	this(sulOracle, lookahead, 0);	2✔
55	}	2✔
56
57	/**
58	* Constructor. Convenience method for {@link #WpMethodEQOracle(MembershipOracle, int, int, int)} that sets
59	* {@code batchSize} to 1.
60	*
61	* @param sulOracle
62	* interface to the system under learning
63	* @param lookahead
64	* the (minimal) maximum length of the "middle" part of the test cases
65	* @param expectedSize
66	* the expected size of the system under learning
67	*/
68	public WpMethodEQOracle(MembershipOracle<I, Boolean> sulOracle, int lookahead, int expectedSize) {
69	this(sulOracle, lookahead, expectedSize, 1);	2✔
70	}	2✔
71
72	/**
73	* Constructor. Uses
74	* {@link Math#max(int, int) Math.max}{@code (lookahead, expectedSize - }{@link DFA#size() hypothesis.size()}{@code
75	* )} (for each procedural {@code hypothesis}) to determine the maximum length of sequences, that should be appended
76	* to the transition-cover part of the test sequence to account for the fact that the system under learning may have
77	* more states than the current hypothesis.
78	*
79	* @param sulOracle
80	* interface to the system under learning
81	* @param lookahead
82	* the (minimal) maximum length of the "middle" part of the test cases
83	* @param expectedSize
84	* the expected size of the system under learning
85	* @param batchSize
86	* size of the batches sent to the membership oracle
87	*
88	* @see WMethodTestsIterator
89	*/
90	public WpMethodEQOracle(MembershipOracle<I, Boolean> sulOracle, int lookahead, int expectedSize, int batchSize) {
91	super(sulOracle, batchSize);	2✔
92	this.lookahead = lookahead;	2✔
93	this.expectedSize = expectedSize;	2✔
94	}	2✔
95
96	@Override
97	protected Stream<Word<I>> generateTestWords(SPA<?, I> hypothesis, Collection<? extends I> inputs) {
98	if (!(inputs instanceof ProceduralInputAlphabet)) {	2✔
99	throw new IllegalArgumentException("Inputs are not a procedural alphabet");	×
100	}
101
102	@SuppressWarnings("unchecked")
103	final ProceduralInputAlphabet<I> alphabet = (ProceduralInputAlphabet<I>) inputs;	2✔
104
105	return Streams.stream(new SPATestsIterator<>(hypothesis,	2✔
106	alphabet,
107	(dfa, alph) -> new WpMethodTestsIterator<>(dfa,	2✔
108	alph,
109	Math.max(lookahead,	2✔
110	expectedSize -
111	dfa.size()))));	2✔
112	}
113	}

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