spark/util/EnumUtil.java

0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one or more
0003  * contributor license agreements.  See the NOTICE file distributed with
0004  * this work for additional information regarding copyright ownership.
0005  * The ASF licenses this file to You under the Apache License, Version 2.0
0006  * (the "License"); you may not use this file except in compliance with
0007  * the License.  You may obtain a copy of the License at
0008  *
0009  *    http://www.apache.org/licenses/LICENSE-2.0
0010  *
0011  * Unless required by applicable law or agreed to in writing, software
0012  * distributed under the License is distributed on an "AS IS" BASIS,
0013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014  * See the License for the specific language governing permissions and
0015  * limitations under the License.
0016  */
0017 package org.apache.spark.util;
0018
0019 import com.google.common.base.Joiner;
0020 import org.apache.spark.annotation.Private;
0021
0022 @Private
0023 public class EnumUtil {
0024   public static <E extends Enum<E>> E parseIgnoreCase(Class<E> clz, String str) {
0025     E[] constants = clz.getEnumConstants();
0026     if (str == null) {
0027       return null;
0028     }
0029     for (E e : constants) {
0030       if (e.name().equalsIgnoreCase(str)) {
0031         return e;
0032       }
0033     }
0034     throw new IllegalArgumentException(
0035       String.format("Illegal type='%s'. Supported type values: %s",
0036         str, Joiner.on(", ").join(constants)));
0037   }
0038 }