13138848026

Committed 04 Feb 2025 02:53PM UTC coverage: 92.108% (+2.2%) from 89.877%

Build # 13138848026

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push

github

Committed by

mtf90

Commit Message

[maven-release-plugin] prepare release automatalib-0.12.0

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/util/src/main/java/net/automatalib/util/automaton/random/RandomAutomatonGenerator.java

/* Copyright (C) 2013-2025 TU Dortmund University
 * This file is part of AutomataLib <https://automatalib.net>.
 *
 * 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 net.automatalib.util.automaton.random;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Random;

import net.automatalib.automaton.MutableAutomaton;
import net.automatalib.common.util.collection.CollectionUtil;
import net.automatalib.common.util.random.RandomUtil;
import org.checkerframework.checker.nullness.qual.Nullable;

public class RandomAutomatonGenerator<S, I, T, SP, TP, A extends MutableAutomaton<S, I, T, SP, TP>> {

    protected final Random random;
    protected final List<? extends I> inputs;
    protected final List<? extends SP> spList;
    protected final List<? extends TP> tpList;
    protected final ArrayList<S> states;
    protected final A automaton;

    public RandomAutomatonGenerator(Random random,
                                    Collection<? extends I> inputs,
                                    Collection<? extends SP> stateProps,
                                    Collection<? extends TP> transProps,
                                    A automaton) {
        this.random = random;

        this.spList = CollectionUtil.randomAccessList(stateProps);
        this.tpList = CollectionUtil.randomAccessList(transProps);

        this.inputs = CollectionUtil.randomAccessList(inputs);
        this.states = new ArrayList<>();
        this.automaton = automaton;
    }

    public A getAutomaton() {
        return automaton;
    }

    protected @Nullable TP randomTransProperty() {
        return RandomUtil.choose(random, tpList);
    }

    protected @Nullable S randomState() {
        return RandomUtil.choose(random, states);
    }

    protected @Nullable S randomDistinctState(int stateIdx) {
        if (states.size() == 1) {
            return null;
        }

        int idx = random.nextInt(states.size() - 1);

        if (idx >= stateIdx) {
            idx++;
        }

        return states.get(idx);
    }

    protected @Nullable I randomInput() {
        return RandomUtil.choose(random, inputs);
    }

    public void addStates(int numStates) {
        states.ensureCapacity(states.size() + numStates);

        for (int i = 0; i < numStates; i++) {
            S state = automaton.addState(randomStateProperty());
            states.add(state);
        }
    }

    protected @Nullable SP randomStateProperty() {
        return RandomUtil.choose(random, spList);
    }

    public void chooseInitial() {
        S init = RandomUtil.choose(random, states);
        if (init != null) {
            automaton.setInitial(init, true);
        }
    }

    public void chooseInitials(int num) {
        List<S> inits = RandomUtil.sampleUnique(random, states, num);

        for (S init : inits) {
            automaton.setInitial(init, true);
        }
    }

}

1	/* Copyright (C) 2013-2025 TU Dortmund University
2	* This file is part of AutomataLib <https://automatalib.net>.
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 net.automatalib.util.automaton.random;
17
18	import java.util.ArrayList;
19	import java.util.Collection;
20	import java.util.List;
21	import java.util.Random;
22
23	import net.automatalib.automaton.MutableAutomaton;
24	import net.automatalib.common.util.collection.CollectionUtil;
25	import net.automatalib.common.util.random.RandomUtil;
26	import org.checkerframework.checker.nullness.qual.Nullable;
27
28	public class RandomAutomatonGenerator<S, I, T, SP, TP, A extends MutableAutomaton<S, I, T, SP, TP>> {
29
30	protected final Random random;
31	protected final List<? extends I> inputs;
32	protected final List<? extends SP> spList;
33	protected final List<? extends TP> tpList;
34	protected final ArrayList<S> states;
35	protected final A automaton;
36
37	public RandomAutomatonGenerator(Random random,
38	Collection<? extends I> inputs,
39	Collection<? extends SP> stateProps,
40	Collection<? extends TP> transProps,
41	A automaton) {	2✔
42	this.random = random;	2✔
43
44	this.spList = CollectionUtil.randomAccessList(stateProps);	2✔
45	this.tpList = CollectionUtil.randomAccessList(transProps);	2✔
46
47	this.inputs = CollectionUtil.randomAccessList(inputs);	2✔
48	this.states = new ArrayList<>();	2✔
49	this.automaton = automaton;	2✔
50	}	2✔
51
52	public A getAutomaton() {
53	return automaton;	×
54	}
55
56	protected @Nullable TP randomTransProperty() {
57	return RandomUtil.choose(random, tpList);	2✔
58	}
59
60	protected @Nullable S randomState() {
61	return RandomUtil.choose(random, states);	2✔
62	}
63
64	protected @Nullable S randomDistinctState(int stateIdx) {
65	if (states.size() == 1) {	×
66	return null;	×
67	}
68
69	int idx = random.nextInt(states.size() - 1);	×
70
71	if (idx >= stateIdx) {	×
72	idx++;	×
73	}
74
75	return states.get(idx);	×
76	}
77
78	protected @Nullable I randomInput() {
79	return RandomUtil.choose(random, inputs);	×
80	}
81
82	public void addStates(int numStates) {
83	states.ensureCapacity(states.size() + numStates);	2✔
84
85	for (int i = 0; i < numStates; i++) {	2✔
86	S state = automaton.addState(randomStateProperty());	2✔
87	states.add(state);	2✔
88	}
89	}	2✔
90
91	protected @Nullable SP randomStateProperty() {
92	return RandomUtil.choose(random, spList);	2✔
93	}
94
95	public void chooseInitial() {
96	S init = RandomUtil.choose(random, states);	2✔
97	if (init != null) {	2✔
98	automaton.setInitial(init, true);	2✔
99	}
100	}	2✔
101
102	public void chooseInitials(int num) {
103	List<S> inits = RandomUtil.sampleUnique(random, states, num);	×
104
105	for (S init : inits) {	×
106	automaton.setInitial(init, true);	×
107	}	×
108	}	×
109
110	}

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