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 */
017package org.apache.logging.log4j.core.lookup;
018
019/**
020 * A default lookup for others to extend.
021 * 
022 * @since 2.1
023 */
024public abstract class AbstractLookup implements StrLookup {
025
026    /**
027     * Calls {@code lookup(null, key)} in the super class.
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}