/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.hc.core5.util;
  
  import java.lang.reflect.Method;
  import java.security.AccessController;
  import java.security.PrivilegedAction;
  
  import org.apache.hc.core5.annotation.Internal;
  
  @Internal
  public final class ReflectionUtils {
  
      public static void callSetter(final Object object, final String setterName, final Class<?> type, final Object value) {
          try {
              final Class<?> clazz = object.getClass();
              final Method method = clazz.getMethod("set" + setterName, type);
              setAccessible(method);
              method.invoke(object, value);
          } catch (final Exception ignore) {
          }
      }
  
      public static <T> T callGetter(final Object object, final String getterName, final Class<T> resultType) {
          try {
              final Class<?> clazz = object.getClass();
              final Method method = clazz.getMethod("get" + getterName);
              setAccessible(method);
              return resultType.cast(method.invoke(object));
          } catch (final Exception ignore) {
              return null;
          }
      }
  
      private static void setAccessible(final Method method) {
          AccessController.doPrivileged(new PrivilegedAction<Object>() {
              @Override
              public Object run() {
                  method.setAccessible(true);
                  return null;
              }
          });
      }
  
      public static int determineJRELevel() {
          final String s = System.getProperty("java.version");
          final String[] parts = s.split("\\.");
          if (parts.length > 0) {
              try {
                  final int majorVersion = Integer.parseInt(parts[0]);
                  if (majorVersion > 1) {
                      return majorVersion;
                  } else if (majorVersion == 1 && parts.length > 1) {
                      return Integer.parseInt(parts[1]);
                  }
              } catch (final NumberFormatException ignore) {
              }
          }
          return 7;
      }
  
  }