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This artifact provides various common utility operations for analyzing and manipulating automata and graphs, such as traversal, minimization and copying.

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/* 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.predicates;

import java.util.function.Predicate;

import net.automatalib.automata.concepts.TransitionOutput;
import net.automatalib.ts.TransitionPredicate;

final class OutputSatisfies implements TransitionPredicate {

    private final TransitionOutput transOut;
    private final Predicate outputPred;
    private final boolean negate;

    OutputSatisfies(TransitionOutput transOut, Predicate outputPred) {
        this(transOut, outputPred, false);
    }

    OutputSatisfies(TransitionOutput transOut,
                           Predicate outputPred,
                           boolean negate) {
        this.transOut = transOut;
        this.outputPred = outputPred;
        this.negate = negate;
    }

    @Override
    public boolean apply(S source, I input, T transition) {
        O out = transOut.getTransitionOutput(transition);
        return negate ^ outputPred.test(out);
    }
}