org.springframework.core

类 MethodIntrospector

java.lang.Object

org.springframework.core.MethodIntrospector

public abstract 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:

4.2.3

作者:

Juergen Hoeller, Rossen Stoyanchev

嵌套类概要

嵌套类

限定符和类型	类和说明
static interface	MethodIntrospector.MetadataLookup<T> A callback interface for metadata lookup on a given method.

构造器概要

构造器

构造器和说明
MethodIntrospector()

方法概要

限定符和类型	方法和说明
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) 方法实现说明:传入class对象，以及metadataLookup接口来获取我们标注了@RequestMapping的方法集合，存放在 Map中
static Set<Method>	selectMethods(Class<?> targetType, ReflectionUtils.MethodFilter methodFilter) Select methods on the given target type based on a filter.

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

public MethodIntrospector()

方法详细资料

selectMethods

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

方法实现说明:传入class对象，以及metadataLookup接口来获取我们标注了@RequestMapping的方法集合，存放在 Map中

参数:

targetType - :我们的具体controller对象的class

metadataLookup:lambda注册的表达式接口 -

selectMethods

public static Set<Method> selectMethods(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)