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Hutool是一个小而全的Java工具类库,通过静态方法封装,降低相关API的学习成本,提高工作效率,使Java拥有函数式语言般的优雅,让Java语言也可以“甜甜的”。
package cn.hutool.aop.proxy;
import cn.hutool.aop.aspects.Aspect;
import cn.hutool.aop.interceptor.SpringCglibInterceptor;
import cn.hutool.core.util.ClassUtil;
import cn.hutool.core.util.ReflectUtil;
import org.springframework.cglib.proxy.Enhancer;
import java.lang.reflect.Constructor;
/**
* 基于Spring-cglib的切面代理工厂
*
* @author looly
*
*/
public class SpringCglibProxyFactory extends ProxyFactory{
private static final long serialVersionUID = 1L;
@Override
public T proxy(T target, Aspect aspect) {
final Class> targetClass = target.getClass();
final Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(targetClass);
enhancer.setCallback(new SpringCglibInterceptor(target, aspect));
return create(enhancer, targetClass);
}
/**
* 创建代理对象
* https://gitee.com/dromara/hutool/issues/I74EX7
* 某些对象存在非空参数构造,则需遍历查找需要的构造完成代理对象构建。
*
* @param 代理对象类型
* @param enhancer {@link Enhancer}
* @param targetClass 目标类型
* @return 代理对象
*/
@SuppressWarnings("unchecked")
private static T create(final Enhancer enhancer, final Class> targetClass) {
final Constructor>[] constructors = ReflectUtil.getConstructors(targetClass);
Class>[] parameterTypes;
Object[] values;
IllegalArgumentException finalException = null;
for (final Constructor> constructor : constructors) {
parameterTypes = constructor.getParameterTypes();
values = ClassUtil.getDefaultValues(parameterTypes);
try {
return (T) enhancer.create(parameterTypes, values);
} catch (final IllegalArgumentException e) {
//ignore
finalException = e;
}
}
if (null != finalException) {
throw finalException;
}
throw new IllegalArgumentException("No constructor provided");
}
}
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