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This artifact provides various common utility operations for analyzing and manipulating
automata and graphs, such as traversal, minimization and copying.
/* Copyright (C) 2013 TU Dortmund
* This file is part of AutomataLib, http://www.automatalib.net/.
*
* AutomataLib is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 3.0 as published by the Free Software Foundation.
*
* AutomataLib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with AutomataLib; if not, see
* http://www.gnu.de/documents/lgpl.en.html.
*/
package net.automatalib.util.automata.random;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import net.automatalib.automata.MutableAutomaton;
import net.automatalib.commons.util.collections.CollectionsUtil;
import net.automatalib.commons.util.random.RandomUtil;
public class AbstractRandomAutomatonGenerator> {
protected final RandomUtil random;
protected final List inputs;
protected final List spList;
protected final List tpList;
protected final ArrayList states;
protected final A automaton;
public AbstractRandomAutomatonGenerator(
Random random,
Collection inputs,
Collection stateProps,
Collection transProps,
A automaton) {
this.random = new RandomUtil(random);
if(stateProps == null)
spList = Collections.singletonList(null);
else
spList = CollectionsUtil.randomAccessList(stateProps);
if(transProps == null)
tpList = Collections.singletonList(null);
else
tpList = CollectionsUtil.randomAccessList(transProps);
this.inputs = CollectionsUtil.randomAccessList(inputs);
this.states = new ArrayList<>();
this.automaton = automaton;
}
public A getAutomaton() {
return automaton;
}
protected SP randomStateProperty() {
return random.choose(spList);
}
protected TP randomTransProperty() {
return random.choose(tpList);
}
protected S randomState() {
return random.choose(states);
}
protected S randomDistinctState(int stateIdx) {
if(states.size() == 1)
return null;
int idx = random.getRandom().nextInt(states.size() - 1);
if(idx >= stateIdx)
idx++;
return states.get(idx);
}
protected I randomInput() {
return random.choose(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);
}
}
public void chooseInitial() {
S init = random.choose(states);
automaton.setInitial(init, true);
}
public void chooseIntials(int num) {
List inits = random.sampleUnique(states, num);
for(S init : inits)
automaton.setInitial(init, true);
}
}