cn.hutool.core.annotation.scanner

Class MetaAnnotationScanner

java.lang.Object

cn.hutool.core.annotation.scanner.MetaAnnotationScanner

All Implemented Interfaces:

AnnotationScanner

public class MetaAnnotationScanner
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TypeAnnotationScanner冲突

Author:

huangchengxing

See Also:

TypeAnnotationScanner

Field Summary

Fields inherited from interface cn.hutool.core.annotation.scanner.AnnotationScanner

DIRECTLY, DIRECTLY_AND_META_ANNOTATION, INTERFACE, INTERFACE_AND_META_ANNOTATION, NOTHING, SUPERCLASS, SUPERCLASS_AND_META_ANNOTATION, TYPE_HIERARCHY, TYPE_HIERARCHY_AND_META_ANNOTATION

Constructor Summary

Constructors

Constructor and Description
MetaAnnotationScanner() 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
MetaAnnotationScanner(boolean includeSupperMetaAnnotation) 构造一个元注解扫描器

Method Summary

Modifier and Type	Method and Description
List<Annotation>	getAnnotations(AnnotatedElement annotatedEle) 获取注解元素上的全部注解。
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 cn.hutool.core.annotation.scanner.AnnotationScanner

getAnnotationsIfSupport, scanByAllSupported, scanByAnySupported, scanIfSupport

Constructor Detail

MetaAnnotationScanner

public MetaAnnotationScanner(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

MetaAnnotationScanner

public MetaAnnotationScanner()

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 Detail

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