程序包 cn.taketoday.web.bind.resolver

类 RequestHeaderMethodArgumentResolver

java.lang.Object

cn.taketoday.web.bind.resolver.AbstractNamedValueResolvingStrategy

cn.taketoday.web.bind.resolver.RequestHeaderMethodArgumentResolver

所有已实现的接口:

ParameterResolvingStrategy

public class RequestHeaderMethodArgumentResolver
extends AbstractNamedValueResolvingStrategy

Resolves method arguments annotated with @RequestHeader except for Map arguments. See RequestHeaderMapMethodArgumentResolver for details on Map arguments annotated with @RequestHeader.

An @RequestHeader is a named value resolved from a request header. It has a required flag and a default value to fall back on when the request header does not exist.

A WebDataBinder is invoked to apply type conversion to resolved request header values that don't yet match the method parameter type.

从以下版本开始:

2019-07-13 11:11

作者:

Arjen Poutsma, Rossen Stoyanchev, Harry Yang

构造器概要

构造器

构造器	说明
RequestHeaderMethodArgumentResolver(cn.taketoday.beans.factory.config.ConfigurableBeanFactory beanFactory)	Create a new RequestHeaderMethodArgumentResolver instance.

方法概要

修饰符和类型	方法	说明
protected void	handleMissingValue(String name, cn.taketoday.core.MethodParameter parameter)	Invoked when a named value is required, but AbstractNamedValueResolvingStrategy.resolveName(String, ResolvableMethodParameter, RequestContext) returned null and there is no default value.
protected void	handleMissingValueAfterConversion(String name, cn.taketoday.core.MethodParameter parameter, RequestContext request)	Invoked when a named value is present but becomes null after conversion.
protected Object	resolveName(String name, ResolvableMethodParameter resolvable, RequestContext context)	Resolve the given parameter type and value name into an argument value.
boolean	supportsParameter(ResolvableMethodParameter parameter)	Whether the given parameter is supported by this resolver.

从类继承的方法 cn.taketoday.web.bind.resolver.AbstractNamedValueResolvingStrategy

getNamedValueInfo, handleMissingValue, handleResolvedValue, resolveArgument

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

RequestHeaderMethodArgumentResolver

public RequestHeaderMethodArgumentResolver(@Nullable
 cn.taketoday.beans.factory.config.ConfigurableBeanFactory beanFactory)

Create a new RequestHeaderMethodArgumentResolver instance.

参数:

beanFactory - a bean factory to use for resolving ${...} placeholder and #{...} SpEL expressions in default values; or null if default values are not expected to have expressions

方法详细资料

supportsParameter

public boolean supportsParameter(ResolvableMethodParameter parameter)

从接口复制的说明: ParameterResolvingStrategy

Whether the given parameter is supported by this resolver.

static match

resolveName

@Nullable
protected Object resolveName(String name,
 ResolvableMethodParameter resolvable,
 RequestContext context)
                      throws Exception

从类复制的说明: AbstractNamedValueResolvingStrategy

Resolve the given parameter type and value name into an argument value.

指定者:

resolveName 在类中 AbstractNamedValueResolvingStrategy

参数:

name - the name of the value being resolved

resolvable - the method parameter to resolve to an argument value (pre-nested in case of a Optional declaration)

context - the current request context

返回:

the resolved argument (may be null)

抛出:

Exception - in case of errors

handleMissingValue

protected void handleMissingValue(String name,
 cn.taketoday.core.MethodParameter parameter)

从类复制的说明: AbstractNamedValueResolvingStrategy

Invoked when a named value is required, but AbstractNamedValueResolvingStrategy.resolveName(String, ResolvableMethodParameter, RequestContext) returned null and there is no default value. Subclasses typically throw an exception in this case.

覆盖:

handleMissingValue 在类中 AbstractNamedValueResolvingStrategy

参数:

name - the name for the value

parameter - the method parameter

handleMissingValueAfterConversion

protected void handleMissingValueAfterConversion(String name,
 cn.taketoday.core.MethodParameter parameter,
 RequestContext request)
                                          throws Exception

从类复制的说明: AbstractNamedValueResolvingStrategy

Invoked when a named value is present but becomes null after conversion.

覆盖:

handleMissingValueAfterConversion 在类中 AbstractNamedValueResolvingStrategy

参数:

name - the name for the value

parameter - the method parameter

request - the current request

抛出:

Exception