/*
* Copyright (c) 2018-2028, DreamLu All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* Neither the name of the dreamlu.net developer nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
* Author: DreamLu 卢春梦 (596392912@qq.com)
*/
package org.springblade.core.tool.utils;
import org.springframework.core.BridgeMethodResolver;
import org.springframework.core.DefaultParameterNameDiscoverer;
import org.springframework.core.MethodParameter;
import org.springframework.core.ParameterNameDiscoverer;
import org.springframework.core.annotation.AnnotatedElementUtils;
import org.springframework.core.annotation.SynthesizingMethodParameter;
import org.springframework.web.method.HandlerMethod;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
/**
* 类操作工具
*
* @author L.cm
*/
public class ClassUtil extends org.springframework.util.ClassUtils {
private static final ParameterNameDiscoverer PARAMETER_NAME_DISCOVERER = new DefaultParameterNameDiscoverer();
/**
* 获取方法参数信息
*
* @param constructor 构造器
* @param parameterIndex 参数序号
* @return {MethodParameter}
*/
public static MethodParameter getMethodParameter(Constructor> constructor, int parameterIndex) {
MethodParameter methodParameter = new SynthesizingMethodParameter(constructor, parameterIndex);
methodParameter.initParameterNameDiscovery(PARAMETER_NAME_DISCOVERER);
return methodParameter;
}
/**
* 获取方法参数信息
*
* @param method 方法
* @param parameterIndex 参数序号
* @return {MethodParameter}
*/
public static MethodParameter getMethodParameter(Method method, int parameterIndex) {
MethodParameter methodParameter = new SynthesizingMethodParameter(method, parameterIndex);
methodParameter.initParameterNameDiscovery(PARAMETER_NAME_DISCOVERER);
return methodParameter;
}
/**
* 获取Annotation
*
* @param method Method
* @param annotationType 注解类
* @param 泛型标记
* @return {Annotation}
*/
public static A getAnnotation(Method method, Class annotationType) {
Class> targetClass = method.getDeclaringClass();
// The method may be on an interface, but we need attributes from the target class.
// If the target class is null, the method will be unchanged.
Method specificMethod = ClassUtil.getMostSpecificMethod(method, targetClass);
// If we are dealing with method with generic parameters, find the original method.
specificMethod = BridgeMethodResolver.findBridgedMethod(specificMethod);
// 先找方法,再找方法上的类
A annotation = AnnotatedElementUtils.findMergedAnnotation(specificMethod, annotationType);
;
if (null != annotation) {
return annotation;
}
// 获取类上面的Annotation,可能包含组合注解,故采用spring的工具类
return AnnotatedElementUtils.findMergedAnnotation(specificMethod.getDeclaringClass(), annotationType);
}
/**
* 获取Annotation
*
* @param handlerMethod HandlerMethod
* @param annotationType 注解类
* @param 泛型标记
* @return {Annotation}
*/
public static A getAnnotation(HandlerMethod handlerMethod, Class annotationType) {
// 先找方法,再找方法上的类
A annotation = handlerMethod.getMethodAnnotation(annotationType);
if (null != annotation) {
return annotation;
}
// 获取类上面的Annotation,可能包含组合注解,故采用spring的工具类
Class> beanType = handlerMethod.getBeanType();
return AnnotatedElementUtils.findMergedAnnotation(beanType, annotationType);
}
/**
* 判断是否有注解 Annotation
*
* @param method Method
* @param annotationType 注解类
* @param 泛型标记
* @return {boolean}
*/
public static boolean isAnnotated(Method method, Class annotationType) {
// 先找方法,再找方法上的类
boolean isMethodAnnotated = AnnotatedElementUtils.isAnnotated(method, annotationType);
if (isMethodAnnotated) {
return true;
}
// 获取类上面的Annotation,可能包含组合注解,故采用spring的工具类
Class> targetClass = method.getDeclaringClass();
return AnnotatedElementUtils.isAnnotated(targetClass, annotationType);
}
}