content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.spark.util;
  
  import com.google.common.base.Joiner;
  import org.apache.spark.annotation.Private;
  
  @Private
  public class EnumUtil {
    public static <E extends Enum<E>> E parseIgnoreCase(Class<E> clz, String str) {
      E[] constants = clz.getEnumConstants();
      if (str == null) {
        return null;
      }
      for (E e : constants) {
        if (e.name().equalsIgnoreCase(str)) {
          return e;
        }
      }
      throw new IllegalArgumentException(
        String.format("Illegal type='%s'. Supported type values: %s",
          str, Joiner.on(", ").join(constants)));
    }
  }
  