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A library for incremental automata construction. This artifact contains algorithms for incrementally
constructing DFAs (prefix-closed and non-prefix-closed), Mealy machines, and Moore machines from a finite,
incrementally growing set of example inputs/outputs.
/* Copyright (C) 2013-2018 TU Dortmund
* This file is part of AutomataLib, http://www.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.incremental.dfa;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import javax.annotation.Nonnull;
import net.automatalib.incremental.ConflictException;
import net.automatalib.visualization.DefaultVisualizationHelper;
import net.automatalib.visualization.VisualizationHelper;
import net.automatalib.words.Alphabet;
import net.automatalib.words.Word;
/**
* Abstract base class for {@link IncrementalDFABuilder}s. This class takes care of holding the input alphabet and its
* size.
*
* @param
* input symbol class
*
* @author Malte Isberner
*/
public abstract class AbstractIncrementalDFABuilder implements IncrementalDFABuilder {
protected final Alphabet inputAlphabet;
protected final int alphabetSize;
/**
* Constructor.
*
* @param inputAlphabet
* the input alphabet
*/
public AbstractIncrementalDFABuilder(@Nonnull Alphabet inputAlphabet) {
this.inputAlphabet = inputAlphabet;
this.alphabetSize = inputAlphabet.size();
}
@Override
public Alphabet getInputAlphabet() {
return inputAlphabet;
}
@Override
public boolean hasDefinitiveInformation(Word word) {
return lookup(word) != Acceptance.DONT_KNOW;
}
@Override
public void insert(Word word) throws ConflictException {
insert(word, true);
}
protected abstract static class AbstractGraphView implements GraphView {
@Override
public VisualizationHelper getVisualizationHelper() {
return new DefaultVisualizationHelper() {
@Override
public Collection initialNodes() {
return Collections.singleton(getInitialNode());
}
@Override
public boolean getNodeProperties(N node, Map properties) {
if (!super.getNodeProperties(node, properties)) {
return false;
}
switch (getAcceptance(node)) {
case TRUE:
properties.put(NodeAttrs.SHAPE, NodeShapes.DOUBLECIRCLE);
break;
case DONT_KNOW:
properties.put(NodeAttrs.STYLE, NodeStyles.DASHED);
break;
default: // case FALSE: default style
}
return true;
}
@Override
public boolean getEdgeProperties(N src, E edge, N tgt, Map properties) {
if (!super.getEdgeProperties(src, edge, tgt, properties)) {
return false;
}
I input = getInputSymbol(edge);
properties.put(EdgeAttrs.LABEL, String.valueOf(input));
return true;
}
};
}
}
protected abstract static class AbstractTransitionSystemView
implements IncrementalDFABuilder.TransitionSystemView {
@Override
public Acceptance getStateProperty(S state) {
return getAcceptance(state);
}
@Override
public Void getTransitionProperty(T transition) {
return null;
}
}
}