130 lines
4.7 KiB
Java
130 lines
4.7 KiB
Java
/**
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* Copyright (c) 2018-2028, DreamLu 卢春梦 (qq596392912@gmail.com).
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* <p>
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* Licensed under the GNU LESSER GENERAL PUBLIC LICENSE 3.0;
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* <p>
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* http://www.gnu.org/licenses/lgpl.html
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* <p>
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springblade.core.tool.utils;
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import org.springframework.core.BridgeMethodResolver;
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import org.springframework.core.DefaultParameterNameDiscoverer;
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import org.springframework.core.MethodParameter;
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import org.springframework.core.ParameterNameDiscoverer;
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import org.springframework.core.annotation.AnnotatedElementUtils;
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import org.springframework.core.annotation.SynthesizingMethodParameter;
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import org.springframework.web.method.HandlerMethod;
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import java.lang.annotation.Annotation;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Method;
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/**
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* 类操作工具
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*
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* @author L.cm
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*/
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public class ClassUtil extends org.springframework.util.ClassUtils {
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private static final ParameterNameDiscoverer PARAMETER_NAME_DISCOVERER = new DefaultParameterNameDiscoverer();
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/**
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* 获取方法参数信息
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*
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* @param constructor 构造器
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* @param parameterIndex 参数序号
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* @return {MethodParameter}
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*/
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public static MethodParameter getMethodParameter(Constructor<?> constructor, int parameterIndex) {
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MethodParameter methodParameter = new SynthesizingMethodParameter(constructor, parameterIndex);
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methodParameter.initParameterNameDiscovery(PARAMETER_NAME_DISCOVERER);
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return methodParameter;
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}
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/**
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* 获取方法参数信息
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*
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* @param method 方法
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* @param parameterIndex 参数序号
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* @return {MethodParameter}
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*/
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public static MethodParameter getMethodParameter(Method method, int parameterIndex) {
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MethodParameter methodParameter = new SynthesizingMethodParameter(method, parameterIndex);
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methodParameter.initParameterNameDiscovery(PARAMETER_NAME_DISCOVERER);
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return methodParameter;
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}
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/**
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* 获取Annotation
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*
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* @param method Method
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* @param annotationType 注解类
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* @param <A> 泛型标记
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* @return {Annotation}
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*/
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public static <A extends Annotation> A getAnnotation(Method method, Class<A> annotationType) {
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Class<?> targetClass = method.getDeclaringClass();
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// The method may be on an interface, but we need attributes from the target class.
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// If the target class is null, the method will be unchanged.
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Method specificMethod = ClassUtil.getMostSpecificMethod(method, targetClass);
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// If we are dealing with method with generic parameters, find the original method.
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specificMethod = BridgeMethodResolver.findBridgedMethod(specificMethod);
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// 先找方法，再找方法上的类
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A annotation = AnnotatedElementUtils.findMergedAnnotation(specificMethod, annotationType);
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;
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if (null != annotation) {
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return annotation;
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}
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// 获取类上面的Annotation，可能包含组合注解，故采用spring的工具类
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return AnnotatedElementUtils.findMergedAnnotation(specificMethod.getDeclaringClass(), annotationType);
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}
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/**
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* 获取Annotation
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*
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* @param handlerMethod HandlerMethod
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* @param annotationType 注解类
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* @param <A> 泛型标记
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* @return {Annotation}
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*/
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public static <A extends Annotation> A getAnnotation(HandlerMethod handlerMethod, Class<A> annotationType) {
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// 先找方法，再找方法上的类
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A annotation = handlerMethod.getMethodAnnotation(annotationType);
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if (null != annotation) {
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return annotation;
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}
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// 获取类上面的Annotation，可能包含组合注解，故采用spring的工具类
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Class<?> beanType = handlerMethod.getBeanType();
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return AnnotatedElementUtils.findMergedAnnotation(beanType, annotationType);
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}
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/**
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* 判断是否有注解 Annotation
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*
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* @param method Method
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* @param annotationType 注解类
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* @param <A> 泛型标记
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* @return {boolean}
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*/
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public static <A extends Annotation> boolean isAnnotated(Method method, Class<A> annotationType) {
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// 先找方法，再找方法上的类
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boolean isMethodAnnotated = AnnotatedElementUtils.isAnnotated(method, annotationType);
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if (isMethodAnnotated) {
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return true;
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}
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// 获取类上面的Annotation，可能包含组合注解，故采用spring的工具类
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Class<?> targetClass = method.getDeclaringClass();
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return AnnotatedElementUtils.isAnnotated(targetClass, annotationType);
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}
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}
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