public void afterPropertiesSet() {
if (this.target == null) {
throw new IllegalArgumentException("Property 'target' is required");
}
if (this.target instanceof String) {
throw new IllegalArgumentException(
"'target' needs to be a bean reference, not a bean name as value");
}
ClassLoader proxyClassLoader = target.getClass().getClassLoader();
ProxyFactory proxyFactory = new ProxyFactory();
if (this.preInterceptors != null) {
for (Object interceptor : this.preInterceptors) {
proxyFactory.addAdvisor(this.advisorAdapterRegistry.wrap(interceptor));
}
}
// Add the main interceptor (typically an Advisor).
proxyFactory.addAdvisor(this.advisorAdapterRegistry.wrap(createMainInterceptor()));
if (this.postInterceptors != null) {
for (Object interceptor : this.postInterceptors) {
proxyFactory.addAdvisor(this.advisorAdapterRegistry.wrap(interceptor));
}
}
proxyFactory.copyFrom(this);
TargetSource targetSource = createTargetSource(this.target);
proxyFactory.setTargetSource(targetSource);
if (this.proxyInterfaces != null) {
proxyFactory.setInterfaces(this.proxyInterfaces);
} else if (!isProxyTargetClass()) {
// Rely on AOP infrastructure to tell us what interfaces to proxy.
proxyFactory.setInterfaces(
ClassUtils.getAllInterfacesForClass(targetSource.getTargetClass(), proxyClassLoader));
}
/**
* use this option to let proxyFactory user cglib to create proxy,otherwise in dynamic script
* ,this is no dynamic interface 使用这个选荋 将使用cglib 产生代理类，否则在动动的java中，没有动态的接口
*/
proxyFactory.setOptimize(true);
this.proxy = proxyFactory.getProxy(proxyClassLoader);
}
protected Object buildLazyResolutionProxy(
final DependencyDescriptor descriptor, final String beanName) {
Assert.state(
getBeanFactory() instanceof DefaultListableBeanFactory,
"BeanFactory needs to be a DefaultListableBeanFactory");
final DefaultListableBeanFactory beanFactory = (DefaultListableBeanFactory) getBeanFactory();
TargetSource ts =
new TargetSource() {
@Override
public Class<?> getTargetClass() {
return descriptor.getDependencyType();
}
@Override
public boolean isStatic() {
return false;
}
@Override
public Object getTarget() {
Object target = beanFactory.doResolveDependency(descriptor, beanName, null, null);
if (target == null) {
throw new NoSuchBeanDefinitionException(
descriptor.getDependencyType(),
"Optional dependency not present for lazy injection point");
}
return target;
}
@Override
public void releaseTarget(Object target) {}
};
ProxyFactory pf = new ProxyFactory();
pf.setTargetSource(ts);
Class<?> dependencyType = descriptor.getDependencyType();
if (dependencyType.isInterface()) {
pf.addInterface(dependencyType);
}
return pf.getProxy(beanFactory.getBeanClassLoader());
}