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.helpers;
018    
019    /**
020     *
021     */
022    public final class NameUtil {
023    
024        private NameUtil() {
025        }
026    
027        public static String getSubName(String name) {
028            if (name.length() == 0) {
029                return null;
030            }
031            int i = name.lastIndexOf(".");
032            return i > 0 ? name.substring(0, i) : "";
033        }
034    }