/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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 com.android.build.gradle.shrinker.parser;

/**
 * {@link Matcher} that can be negated (e.g. by prepending "!" to a class name).
 */
public abstract class MatcherWithNegator<T> implements Matcher<T> {
    private boolean negator = false;

    @Override
    public boolean matches(T t) {
        boolean result = matchesWithoutNegator(t);
        if (!negator) {
            return result;
        } else {
            return !result;
        }
    }

    protected abstract boolean matchesWithoutNegator(T t);

    public void setNegator(boolean negator) {
        this.negator = negator;
    }
}
