content: /*
   * Copyright 2021-2022 Alibaba Group Holding Ltd.
   *
   *    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 com.aliyun.fastmodel.converter.util;
  
  import java.lang.reflect.ParameterizedType;
  import java.lang.reflect.Type;
  
  /**
   * GenericTypeUtil
   *
   * @author panguanjing
   * @date 2021/6/14
   */
  public class GenericTypeUtil {
      public static Class getSuperClassGenericType(Class clazz, int index)
          throws IndexOutOfBoundsException {
          Type genType = clazz.getGenericSuperclass();
          if (!(genType instanceof ParameterizedType)) {
              return Object.class;
          }
          Type[] params = ((ParameterizedType)genType).getActualTypeArguments();
          if (index >= params.length || index < 0) {
              return Object.class;
          }
          if (!(params[index] instanceof Class)) {
              return Object.class;
          }
          return (Class)params[index];
      }
  
      public static Class getSuperInterfaceGenericType(Class clazz, int index)
          throws IndexOutOfBoundsException {
          Type[] params = clazz.getGenericInterfaces();
          if (params.length == 0) {
              return Object.class;
          }
          Type genType = params[0];
          if (!(genType instanceof ParameterizedType)) {
              return Object.class;
          }
          ParameterizedType parameterizedType = (ParameterizedType)genType;
          Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();
          if (index >= actualTypeArguments.length || index < 0) {
              return Object.class;
          }
          if (!(actualTypeArguments[index] instanceof Class)) {
              return Object.class;
          }
          return (Class)actualTypeArguments[index];
      }
  }
  