content: /*
   * Copyright (C) 2012 Facebook, Inc.
   *
   * Licensed 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 io.airlift.drift.codec.metadata;
  
  import io.airlift.drift.annotations.ThriftEnum;
  
  import static com.google.common.base.Preconditions.checkArgument;
  
  // This class is not thread safe
  public class ThriftEnumMetadataBuilder<T extends Enum<T>>
  {
      private final Class<T> enumClass;
      private final String enumName;
  
      public static <T extends Enum<T>> ThriftEnumMetadata<T> thriftEnumMetadata(Class<T> enumClass)
      {
          return new ThriftEnumMetadataBuilder<>(enumClass).build();
      }
  
      private ThriftEnumMetadataBuilder(Class<T> enumClass)
      {
          this.enumClass = enumClass;
          this.enumName = extractEnumName(enumClass);
      }
  
      private ThriftEnumMetadata<T> build()
      {
          return new ThriftEnumMetadata<>(enumName, enumClass);
      }
  
      private String extractEnumName(Class<T> enumClass)
      {
          ThriftEnum annotation = enumClass.getAnnotation(ThriftEnum.class);
          checkArgument(annotation != null, "Enum class %s is not annotated with @ThriftEnum", enumClass.getName());
          if (!annotation.value().isEmpty()) {
              return annotation.value();
          }
          return enumClass.getSimpleName();
      }
  }
  