/*
    * Copyright 2018 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.openehealth.ipf.commons.spring.core.config;
  
  import org.springframework.aop.SpringProxy;
  import org.springframework.aop.framework.Advised;
  import org.springframework.util.Assert;
  
  import java.lang.reflect.Proxy;
  
  /**
   *
   */
  final class ProxyUtils {
  
      static boolean isJDKDynamicProxy(Class<?> beanClass) {
          return Proxy.isProxyClass(beanClass);
      }
  
      static <T> Class<T> getFirstProxiedInterface(Class<?> proxyClass) {
          int nonUserInterfaceCount = 0;
          if (proxyClass.isAssignableFrom(SpringProxy.class)) {
              ++nonUserInterfaceCount;
          }
          if (proxyClass.isAssignableFrom(Advised.class)) {
              ++nonUserInterfaceCount;
          }
          Class[] proxyInterfaces = proxyClass.getInterfaces();
          Class[] userInterfaces = new Class[proxyInterfaces.length - nonUserInterfaceCount];
          System.arraycopy(proxyInterfaces, 0, userInterfaces, 0, userInterfaces.length);
          Assert.notEmpty(userInterfaces, "JDK proxy must implement one or more interfaces");
          return (Class<T>)userInterfaces[0];
      }
  
  }