NegatedPredicate.java

/*
 * Copyright 2015 by Thomas Lottermann
 *
 * 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 notaql.model.predicate;

import notaql.datamodel.fixation.Fixation;
import notaql.evaluation.ValueEvaluationResult;

/**
 * Created by thomas on 03.12.14.
 */
public class NegatedPredicate implements Predicate {
    private static final long serialVersionUID = 7587320225758409948L;
    private Predicate predicate;

    public NegatedPredicate(Predicate predicate) {
        this.predicate = predicate;
    }

    @Override
    public boolean evaluate(ValueEvaluationResult step, Fixation contextFixation) {
        return !predicate.evaluate(step, contextFixation);
    }

    public Predicate getPredicate() {
        return predicate;
    }

    @Override
    public String toString() {
        return "!" + predicate.toString();
    }
}