    001    /*
    002     * Licensed to the Apache Software Foundation (ASF) under one or more
    003     * contributor license agreements. See the NOTICE file distributed with
    004     * this work for additional information regarding copyright ownership.
    005     * The ASF licenses this file to You under the Apache license, Version 2.0
    006     * (the "License"); you may not use this file except in compliance with
    007     * the License. You may obtain a copy of the License at
    008     *
    009     *      http://www.apache.org/licenses/LICENSE-2.0
    010     *
    011     * Unless required by applicable law or agreed to in writing, software
    012     * distributed under the License is distributed on an "AS IS" BASIS,
    013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014     * See the license for the specific language governing permissions and
    015     * limitations under the license.
    016     */
    017    package org.apache.logging.log4j.core.lookup;
    018
    019    /**
    020     * A default lookup for others to extend.
    021     *
    022     * @since 2.1
    023     */
    024    public abstract class AbstractLookup implements StrLookup {
    025
    026        /**
    027         * Calls {@code lookup(null, key);}
    028         *
    029         * @see StrLookup#lookup(LogEvent, String)
    030         */
    031        @Override
    032        public String lookup(final String key) {
    033            return lookup(null, key);
    034        }
    035
    036    }