net.automatalib.util.automata.builders.AutomatonBuilderImpl Maven / Gradle / Ivy
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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) 2013-2019 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.util.automata.builders;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.github.misberner.duzzt.annotations.DSLAction;
import com.github.misberner.duzzt.annotations.GenerateEmbeddedDSL;
import net.automatalib.automata.MutableAutomaton;
@GenerateEmbeddedDSL(name = "AutomatonBuilder",
enableAllMethods = false,
syntax = "((from (on (withProperty? <>)+)+)|withStateProperty|withInitial)* create")
class AutomatonBuilderImpl> {
protected final A automaton;
private final Map stateMap = new HashMap<>();
protected List currentStates;
protected List currentInputs;
protected TP currentTransProp;
AutomatonBuilderImpl(A automaton) {
this.automaton = automaton;
}
@DSLAction
public void from(Object stateId) {
this.currentStates = getStates(stateId);
this.currentInputs = null;
}
@DSLAction
public void from(Object firstStateId, Object... otherStateIds) {
this.currentStates = getStates(firstStateId, otherStateIds);
}
protected List getStates(Object firstStateId, Object... otherStateIds) {
if (otherStateIds.length == 0) {
return Collections.singletonList(getState(firstStateId));
}
List result = new ArrayList<>(1 + otherStateIds.length);
result.add(getState(firstStateId));
for (Object otherId : otherStateIds) {
result.add(getState(otherId));
}
return result;
}
protected S getState(Object stateId) {
if (stateMap.containsKey(stateId)) {
return stateMap.get(stateId);
}
S state = automaton.addState();
stateMap.put(stateId, state);
return state;
}
@DSLAction
public void on(I input) {
this.currentInputs = Collections.singletonList(input);
this.currentTransProp = null;
}
@DSLAction
@SafeVarargs
public final void on(I firstInput, I... otherInputs) {
this.currentInputs = new ArrayList<>(1 + otherInputs.length);
this.currentInputs.add(firstInput);
Collections.addAll(this.currentInputs, otherInputs);
}
@DSLAction
public void withProperty(TP transProp) {
this.currentTransProp = transProp;
}
@DSLAction
public void to(Object stateId) {
S tgt = getState(stateId);
for (S src : currentStates) {
for (I input : currentInputs) {
automaton.addTransition(src, input, tgt, currentTransProp);
}
}
}
@DSLAction
public void loop() {
for (S src : currentStates) {
for (I input : currentInputs) {
automaton.addTransition(src, input, src, currentTransProp);
}
}
}
@DSLAction(terminator = true)
public A create() {
return automaton;
}
@DSLAction
public void withInitial(Object stateId) {
S state = getState(stateId);
automaton.setInitial(state, true);
}
@DSLAction
public void withStateProperty(SP stateProperty, Object stateId) {
S state = getState(stateId);
automaton.setStateProperty(state, stateProperty);
}
}