Package org.aoju.bus.core.scanner.annotation

Class MetaScanner

java.lang.Object

org.aoju.bus.core.scanner.annotation.MetaScanner

All Implemented Interfaces:

AnnotationScanner

public class MetaScanner
extends Object
implements AnnotationScanner

扫描注解类上存在的注解，支持处理枚举实例或枚举类型 需要注意，当待解析是枚举类时，有可能与TypeScanner冲突

Since:

Java 17+

Author:

Kimi Liu

Constructor Summary

Constructors

Constructor	Description
MetaScanner()	构造一个元注解扫描器，默认在扫描当前注解上的元注解后，并继续递归扫描元注解
MetaScanner(boolean includeSupperMetaAnnotation)	构造一个元注解扫描器

Method Summary

Modifier and Type	Method	Description
List<Annotation>	getAnnotations(AnnotatedElement annotatedEle)	获取注解元素上的全部注解。调用该方法前，需要确保调用support(AnnotatedElement)返回为true
void	scan(BiConsumer<Integer,Annotation> consumer, AnnotatedElement annotatedEle, Predicate<Annotation> filter)	按广度优先扫描指定注解上的元注解，对扫描到的注解与层级索引进行操作
boolean	support(AnnotatedElement annotatedEle)	判断是否支持扫描该注解元素，仅当注解元素是Annotation接口的子类Class时返回true

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.aoju.bus.core.scanner.AnnotationScanner

getIfSupport, scanIfSupport

Constructor Details

MetaScanner

public MetaScanner(boolean includeSupperMetaAnnotation)

构造一个元注解扫描器

Parameters:

includeSupperMetaAnnotation - 获取当前注解的元注解后，是否继续递归扫描的元注解的元注解

MetaScanner

public MetaScanner()

构造一个元注解扫描器，默认在扫描当前注解上的元注解后，并继续递归扫描元注解

Method Details

support

public boolean support(AnnotatedElement annotatedEle)

判断是否支持扫描该注解元素，仅当注解元素是Annotation接口的子类Class时返回true

Specified by:

support in interface AnnotationScanner

Parameters:

annotatedEle - AnnotatedElement，可以是Class、Method、Field、Constructor、ReflectPermission

Returns:

是否支持扫描该注解元素

getAnnotations

public List<Annotation> getAnnotations(AnnotatedElement annotatedEle)

获取注解元素上的全部注解。调用该方法前，需要确保调用support(AnnotatedElement)返回为true

Specified by:

getAnnotations in interface AnnotationScanner

Parameters:

annotatedEle - AnnotatedElement，可以是Class、Method、Field、Constructor、ReflectPermission

Returns:

注解

scan

public void scan(BiConsumer<Integer,Annotation> consumer,
 AnnotatedElement annotatedEle,
 Predicate<Annotation> filter)

按广度优先扫描指定注解上的元注解，对扫描到的注解与层级索引进行操作

Specified by:

scan in interface AnnotationScanner

Parameters:

consumer - 当前层级索引与操作

annotatedEle - AnnotatedElement，可以是Class、Method、Field、Constructor、ReflectPermission

filter - 过滤器