/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.logging.log4j.core.layout.internal;

import java.util.List;

/**
 * Class Description goes here.
 */

public interface ListChecker {

    static final NoopChecker NOOP_CHECKER = new NoopChecker();

    boolean check(final String key);

    /**
     * Does nothing.
     */
    public class NoopChecker implements ListChecker {
        @Override
        public boolean check(final String key) {
            return true;
        }

        @Override
        public String toString() {
            return "";
        }
    }
}