net.automatalib.util.ts.iterators.UndefinedInputsIterator Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of automata-util Show documentation
Show all versions of automata-util Show documentation
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.ts.iterators;
import java.util.Collection;
import java.util.Iterator;
import com.google.common.collect.AbstractIterator;
import net.automatalib.ts.TransitionSystem;
public final class UndefinedInputsIterator extends AbstractIterator {
private final TransitionSystem ts;
private final Iterator inputsIt;
private final S state;
public UndefinedInputsIterator(TransitionSystem ts, S state, Iterator inputsIt) {
this.ts = ts;
this.inputsIt = inputsIt;
this.state = state;
}
@Override
protected I computeNext() {
while (inputsIt.hasNext()) {
I input = inputsIt.next();
Collection transitions = ts.getTransitions(state, input);
if (transitions == null || !transitions.isEmpty()) {
return input;
}
}
return endOfData();
}
}