content: package com.alibaba.excel.util;
  
  import java.lang.reflect.AccessibleObject;
  import java.lang.reflect.Member;
  import java.lang.reflect.Modifier;
  
  /**
   * 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.
   *
   * @author Apache Software Foundation (ASF)
   */
  public class MemberUtils {
  
      private static final int ACCESS_TEST = Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE;
  
  
      /**
       * XXX Default access superclass workaround.
       *
       * When a {@code public} class has a default access superclass with {@code public} members,
       * these members are accessible. Calling them from compiled code works fine.
       * Unfortunately, on some JVMs, using reflection to invoke these members
       * seems to (wrongly) prevent access even when the modifier is {@code public}.
       * Calling {@code setAccessible(true)} solves the problem but will only work from
       * sufficiently privileged code. Better workarounds would be gratefully
       * accepted.
       * @param o the AccessibleObject to set as accessible
       * @return a boolean indicating whether the accessibility of the object was set to true.
       */
      static boolean setAccessibleWorkaround(final AccessibleObject o) {
          if (o == null || o.isAccessible()) {
              return false;
          }
          final Member m = (Member) o;
          if (!o.isAccessible() && Modifier.isPublic(m.getModifiers()) && isPackageAccess(m.getDeclaringClass().getModifiers())) {
              try {
                  o.setAccessible(true);
                  return true;
              } catch (final SecurityException e) { // NOPMD
                  // ignore in favor of subsequent IllegalAccessException
              }
          }
          return false;
      }
  
      /**
       * Returns whether a given set of modifiers implies package access.
       * @param modifiers to test
       * @return {@code true} unless {@code package}/{@code protected}/{@code private} modifier detected
       */
      static boolean isPackageAccess(final int modifiers) {
          return (modifiers & ACCESS_TEST) == 0;
      }
  }
  