/*
    *    Copyright 2009-2021 the original author or authors.
    *
    *    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 org.apache.ibatis.reflection.invoker;
  
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  
  import org.apache.ibatis.reflection.Reflector;
  
  /**
   * @author Clinton Begin
   */
  public class MethodInvoker implements Invoker {
  
    private final Class<?> type;
    private final Method method;
  
    public MethodInvoker(Method method) {
      this.method = method;
  
      if (method.getParameterTypes().length == 1) {
        type = method.getParameterTypes()[0];
      } else {
        type = method.getReturnType();
      }
    }
  
    @Override
    public Object invoke(Object target, Object[] args) throws IllegalAccessException, InvocationTargetException {
      try {
        return method.invoke(target, args);
      } catch (IllegalAccessException e) {
        if (Reflector.canControlMemberAccessible()) {
          method.setAccessible(true);
          return method.invoke(target, args);
        } else {
          throw e;
        }
      }
    }
  
    @Override
    public Class<?> getType() {
      return type;
    }
  }