程序包 cn.taketoday.core

类 MethodIntrospector

java.lang.Object

cn.taketoday.core.MethodIntrospector

public final class MethodIntrospector
extends Object

Defines the algorithm for searching for metadata-associated methods exhaustively including interfaces and parent classes while also dealing with parameterized methods as well as common scenarios encountered with interface and class-based proxies.

Typically, but not necessarily, used for finding annotated handler methods.

从以下版本开始:

4.0

作者:

Juergen Hoeller, Rossen Stoyanchev, TODAY 2021/11/11 10:26

嵌套类概要

嵌套类

修饰符和类型	类	说明
static interface	MethodIntrospector.MetadataLookup<T>	A callback interface for metadata lookup on a given method.

构造器概要

构造器

限定符	构造器	说明
private	MethodIntrospector()

方法概要

修饰符和类型	方法	说明
static Set<Method>	filterMethods(Class<?> targetType, ReflectionUtils.MethodFilter methodFilter)	Select methods on the given target type based on a filter.
static Method	selectInvocableMethod(Method method, Class<?> targetType)	Select an invocable method on the target type: either the given method itself if actually exposed on the target type, or otherwise a corresponding method on one of the target type's interfaces or on the target type itself.
static <T> Map<Method,T>	selectMethods(Class<?> targetType, MethodIntrospector.MetadataLookup<T> metadataLookup)	Select methods on the given target type based on the lookup of associated metadata.

从类继承的方法 java.lang.Object

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

构造器详细资料

MethodIntrospector

private MethodIntrospector()

方法详细资料

selectMethods

public static <T> Map<Method,T> selectMethods(Class<?> targetType,
 MethodIntrospector.MetadataLookup<T> metadataLookup)

Select methods on the given target type based on the lookup of associated metadata.

Callers define methods of interest through the MethodIntrospector.MetadataLookup parameter, allowing to collect the associated metadata into the result map.

参数:

targetType - the target type to search methods on

metadataLookup - a MethodIntrospector.MetadataLookup callback to inspect methods of interest, returning non-null metadata to be associated with a given method if there is a match, or null for no match

返回:

the selected methods associated with their metadata (in the order of retrieval), or an empty map in case of no match

filterMethods

public static Set<Method> filterMethods(Class<?> targetType,
 ReflectionUtils.MethodFilter methodFilter)

Select methods on the given target type based on a filter.

Callers define methods of interest through the MethodFilter parameter.

参数:

targetType - the target type to search methods on

methodFilter - a MethodFilter to help recognize handler methods of interest

返回:

the selected methods, or an empty set in case of no match

selectInvocableMethod

public static Method selectInvocableMethod(Method method,
 Class<?> targetType)

Select an invocable method on the target type: either the given method itself if actually exposed on the target type, or otherwise a corresponding method on one of the target type's interfaces or on the target type itself.

Matches on user-declared interfaces will be preferred since they are likely to contain relevant metadata that corresponds to the method on the target class.

参数:

method - the method to check

targetType - the target type to search methods on (typically an interface-based JDK proxy)

返回:

a corresponding invocable method on the target type

抛出:

IllegalStateException - if the given method is not invocable on the given target type (typically due to a proxy mismatch)