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.util; 018 019 import java.util.Locale; 020 021 /** 022 * Helps convert English Strings to English Enum values. 023 * <p> 024 * Enum name arguments are converted internally to upper case with the {@linkplain Locale#ENGLISH ENGLISH} locale to 025 * avoid problems on the Turkish locale. Do not use with Turkish enum values. 026 * </p> 027 */ 028 public class EnglishEnums { 029 030 /** 031 * Returns the Result for the given string. 032 * <p> 033 * The {@code name} is converted internally to upper case with the {@linkplain Locale#ENGLISH ENGLISH} locale to 034 * avoid problems on the Turkish locale. Do not use with Turkish enum values. 035 * </p> 036 * 037 * @param name 038 * The enum name, case-insensitive. If null, returns {@code defaultValue} 039 * @return an enum value or null if {@code name} is null 040 */ 041 public static <T extends Enum<T>> T valueOf(Class<T> enumType, String name) { 042 return valueOf(enumType, name, null); 043 } 044 045 /** 046 * Returns an enum value for the given string. 047 * <p> 048 * The {@code name} is converted internally to upper case with the {@linkplain Locale#ENGLISH ENGLISH} locale to 049 * avoid problems on the Turkish locale. Do not use with Turkish enum values. 050 * </p> 051 * 052 * @param name 053 * The enum name, case-insensitive. If null, returns {@code defaultValue} 054 * @param defaultValue 055 * the enum value to return if {@code name} is null 056 * @return an enum value or {@code defaultValue} if {@code name} is null 057 */ 058 public static <T extends Enum<T>> T valueOf(Class<T> enumType, String name, T defaultValue) { 059 return name == null ? defaultValue : Enum.valueOf(enumType, name.toUpperCase(Locale.ENGLISH)); 060 } 061 062 }