spring复习：（33）AopProxyFactory接口-Toy模板网

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public interface AopProxyFactory {

	/**
	 * Create an {@link AopProxy} for the given AOP configuration.
	 * @param config the AOP configuration in the form of an
	 * AdvisedSupport object
	 * @return the corresponding AOP proxy
	 * @throws AopConfigException if the configuration is invalid
	 */
	AopProxy createAopProxy(AdvisedSupport config) throws AopConfigException;

}

该接口只用一个方法： createAopProxy，用来创建Aop代理对象，它只有一个实现类：DefaultAopProxyFactory.
public class DefaultAopProxyFactory implements AopProxyFactory, Serializable {

@Override
public AopProxy createAopProxy(AdvisedSupport config) throws AopConfigException {
	if (config.isOptimize() || config.isProxyTargetClass() || hasNoUserSuppliedProxyInterfaces(config)) {
		Class<?> targetClass = config.getTargetClass();
		if (targetClass == null) {
			throw new AopConfigException("TargetSource cannot determine target class: " +
					"Either an interface or a target is required for proxy creation.");
		}
		if (targetClass.isInterface() || Proxy.isProxyClass(targetClass)) {
			return new JdkDynamicAopProxy(config);
		}
		return new ObjenesisCglibAopProxy(config);
	}
	else {
		return new JdkDynamicAopProxy(config);
	}
}

/**
 * Determine whether the supplied {@link AdvisedSupport} has only the
 * {@link org.springframework.aop.SpringProxy} interface specified
 * (or no proxy interfaces specified at all).
 */
private boolean hasNoUserSuppliedProxyInterfaces(AdvisedSupport config) {
	Class<?>[] ifcs = config.getProxiedInterfaces();
	return (ifcs.length == 0 || (ifcs.length == 1 && SpringProxy.class.isAssignableFrom(ifcs[0])));
}

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