二刷AOP源码（下）

protected Object wrapIfNecessary(Object bean, String beanName, Object cacheKey) {
        if (beanName != null && this.targetSourcedBeans.contains(beanName)) {
            return bean;
        }
        if (Boolean.FALSE.equals(this.advisedBeans.get(cacheKey))) {
            return bean;
        }
        if (isInfrastructureClass(bean.getClass()) || shouldSkip(bean.getClass(), beanName)) {
            this.advisedBeans.put(cacheKey, Boolean.FALSE);
            return bean;
        }
        【1】是否有适合当前Bean的建议者。
        Object[] specificInterceptors = getAdvicesAndAdvisorsForBean(bean.getClass(), beanName, null);
        if (specificInterceptors != DO_NOT_PROXY) {
            this.advisedBeans.put(cacheKey, Boolean.TRUE);
      【2】创建代理对象
            Object proxy = createProxy(
                    bean.getClass(), beanName, specificInterceptors, new SingletonTargetSource(bean));
            this.proxyTypes.put(cacheKey, proxy.getClass());
            return proxy;
        }
        this.advisedBeans.put(cacheKey, Boolean.FALSE);
        return bean;
    }

private final AdvisedSupport advised;

protected Object createProxy(
            Class<?> beanClass, String beanName, Object[] specificInterceptors, TargetSource targetSource) {
    【1】ProxyFactory组件
        ProxyFactory proxyFactory = new ProxyFactory();
        proxyFactory.copyFrom(this);
      【2】设置建议者
        Advisor[] advisors = buildAdvisors(beanName, specificInterceptors);
        proxyFactory.addAdvisors(advisors);
      【3】创建代理对象
        return proxyFactory.getProxy(getProxyClassLoader());
    }

public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
[1]
List<Object> chain = this.advised.getInterceptorsAndDynamicInterceptionAdvice(method, targetClass);
[2]
invocation = new ReflectiveMethodInvocation(proxy, target, method, args, targetClass, chain);
[3]
// Proceed to the joinpoint through the interceptor chain.
retVal = invocation.proceed();
}