Java Enhancer.createClass方法代码示例

import org.springframework.cglib.proxy.Enhancer; //导入方法依赖的package包/类
/**
 * Create a subclass proxy that intercepts calls to getObject(), delegating to the current BeanFactory
 * instead of creating a new instance. These proxies are created only when calling a FactoryBean from
 * within a Bean method, allowing for proper scoping semantics even when working against the FactoryBean
 * instance directly. If a FactoryBean instance is fetched through the container via &-dereferencing,
 * it will not be proxied. This too is aligned with the way XML configuration works.
 */
private Object enhanceFactoryBean(Class<?> fbClass, String beanName) throws InstantiationException, IllegalAccessException {
	Enhancer enhancer = new Enhancer();
	enhancer.setSuperclass(fbClass);
	enhancer.setUseFactory(false);
	enhancer.setCallbackFilter(CALLBACK_FILTER);
	// Callback instances must be ordered in the same way as CALLBACK_TYPES and CALLBACK_FILTER
	Callback[] callbackInstances = new Callback[] {
			new GetObjectMethodInterceptor(this.beanFactory, beanName),
			NoOp.INSTANCE
	};
	enhancer.setCallbackTypes(CALLBACK_TYPES);
	Class<?> fbSubclass = enhancer.createClass();
	Enhancer.registerStaticCallbacks(fbSubclass, callbackInstances);
	return fbSubclass.newInstance();
}
 

import org.springframework.cglib.proxy.Enhancer; //导入方法依赖的package包/类
/**
 * Uses enhancer to generate a subclass of superclass,
 * ensuring that callbacks are registered for the new subclass.
 */
private Class<?> createClass(Enhancer enhancer) {
	Class<?> subclass = enhancer.createClass();
	// Registering callbacks statically (as opposed to thread-local)
	// is critical for usage in an OSGi environment (SPR-5932)...
	Enhancer.registerStaticCallbacks(subclass, CALLBACKS);
	return subclass;
}
 

import org.springframework.cglib.proxy.Enhancer; //导入方法依赖的package包/类
/**
 * Create an enhanced subclass of the bean class for the provided bean
 * definition, using CGLIB.
 */
private Class<?> createEnhancedSubclass(RootBeanDefinition beanDefinition) {
	Enhancer enhancer = new Enhancer();
	enhancer.setSuperclass(beanDefinition.getBeanClass());
	enhancer.setNamingPolicy(SpringNamingPolicy.INSTANCE);
	enhancer.setCallbackFilter(new MethodOverrideCallbackFilter(beanDefinition));
	enhancer.setCallbackTypes(CALLBACK_TYPES);
	return enhancer.createClass();
}
 

import org.springframework.cglib.proxy.Enhancer; //导入方法依赖的package包/类
@SuppressWarnings("unchecked")
private static <T> T createProxy(final Class<?> classToMock, final MethodInterceptor interceptor) {
	final Enhancer enhancer = new Enhancer();
	enhancer.setSuperclass(classToMock);
	enhancer.setCallbackType(interceptor.getClass());
	final Class<?> proxyClass = enhancer.createClass();
	Enhancer.registerCallbacks(proxyClass, new Callback[] { interceptor });
	return (T) ObjenesisHelper.newInstance(proxyClass);
}
 

import org.springframework.cglib.proxy.Enhancer; //导入方法依赖的package包/类
/**
 * Create an enhanced subclass of the bean class for the provided bean
 * definition, using CGLIB.
 */
private Class<?> createEnhancedSubclass(RootBeanDefinition beanDefinition) {
	Enhancer enhancer = new Enhancer();
	enhancer.setSuperclass(beanDefinition.getBeanClass());
	enhancer.setNamingPolicy(SpringNamingPolicy.INSTANCE);
	if (this.owner instanceof ConfigurableBeanFactory) {
		ClassLoader cl = ((ConfigurableBeanFactory) this.owner).getBeanClassLoader();
		enhancer.setStrategy(new ClassLoaderAwareGeneratorStrategy(cl));
	}
	enhancer.setCallbackFilter(new MethodOverrideCallbackFilter(beanDefinition));
	enhancer.setCallbackTypes(CALLBACK_TYPES);
	return enhancer.createClass();
}
 

import org.springframework.cglib.proxy.Enhancer; //导入方法依赖的package包/类
/**
 * Uses enhancer to generate a subclass of superclass, ensuring that
 * {@link #callbackInstances} are registered for the new subclass.
 */
private Class<?> createClass(Enhancer enhancer) {
	Class<?> subclass = enhancer.createClass();
	// Registering callbacks statically (as opposed to thread-local)
	// is critical for usage in an OSGi environment (SPR-5932)...
	Enhancer.registerStaticCallbacks(subclass, this.callbackInstances);
	return subclass;
}