Top Description Inners Constructors Methods
org.springframework.web.reactive.result.method.annotation

public Class ExpressionValueMethodArgumentResolver

extends AbstractNamedValueSyncArgumentResolver
Class Inheritance
Imports
org.springframework.beans.factory.annotation.Value, org.springframework.beans.factory.config.ConfigurableBeanFactory, org.springframework.core.MethodParameter, .ReactiveAdapterRegistry, org.springframework.lang.Nullable, org.springframework.util.Assert, org.springframework.web.server.ServerWebExchange
Resolves method arguments annotated with @Value.

An @Value does not have a name but gets resolved from the default value string, which may contain ${...} placeholder or Spring Expression Language #{...} expressions.

Author
Rossen Stoyanchev
Since
5.0

Nested and Inner Type Summary

Modifier and TypeClass and Description
private static class
ExpressionValueMethodArgumentResolver.ExpressionValueNamedValueInfo

Constructor Summary

AccessConstructor and Description
public
ExpressionValueMethodArgumentResolver(ConfigurableBeanFactory
a bean factory to use for resolving ${...} placeholder and #{...} SpEL expressions in default values; or null if default values are not expected to contain expressions
factory, ReactiveAdapterRegistry
for checking reactive type wrappers
registry)

Create a new ExpressionValueMethodArgumentResolver instance.

Method Summary

Modifier and TypeMethod and Description
protected AbstractNamedValueArgumentResolver.NamedValueInfo
createNamedValueInfo(MethodParameter
the method parameter
parameter)

Implements abstract org.springframework.web.reactive.result.method.annotation.AbstractNamedValueArgumentResolver.createNamedValueInfo.

Create the NamedValueInfo object for the given method parameter.

protected void
handleMissingValue(String
the name for the value
name, MethodParameter
the method parameter
parameter)

Overrides org.springframework.web.reactive.result.method.annotation.AbstractNamedValueArgumentResolver.handleMissingValue.

Invoked when a named value is required, but resolveName(String, MethodParameter, ServerWebExchange) returned null and there is no default value.

protected Object
resolveNamedValue(String name, MethodParameter parameter, ServerWebExchange exchange)

Implements abstract org.springframework.web.reactive.result.method.annotation.AbstractNamedValueSyncArgumentResolver.resolveNamedValue.

Actually resolve the value synchronously.

public boolean
supportsParameter(MethodParameter
the method parameter
param)

Implements org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver.supportsParameter.

Whether this resolver supports the given method parameter.

Inherited from org.springframework.web.reactive.result.method.annotation.AbstractNamedValueSyncArgumentResolver:
resolveArgumentresolveArgumentValueresolveName

Constructor Detail

ExpressionValueMethodArgumentResolverback to summary
public ExpressionValueMethodArgumentResolver(ConfigurableBeanFactory factory, ReactiveAdapterRegistry registry)

Create a new ExpressionValueMethodArgumentResolver instance.

Parameters
factory:ConfigurableBeanFactory

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

registry:ReactiveAdapterRegistry

for checking reactive type wrappers

Method Detail

createNamedValueInfoback to summary
protected AbstractNamedValueArgumentResolver.NamedValueInfo createNamedValueInfo(MethodParameter parameter)

Implements abstract org.springframework.web.reactive.result.method.annotation.AbstractNamedValueArgumentResolver.createNamedValueInfo.

Doc from org.springframework.web.reactive.result.method.annotation.AbstractNamedValueArgumentResolver.createNamedValueInfo.

Create the NamedValueInfo object for the given method parameter. Implementations typically retrieve the method annotation by means of MethodParameter#getParameterAnnotation(Class).

Parameters
parameter:MethodParameter

the method parameter

Returns:AbstractNamedValueArgumentResolver.NamedValueInfo

the named value information

Annotations
@Override
handleMissingValueback to summary
protected void handleMissingValue(String name, MethodParameter parameter)

Overrides org.springframework.web.reactive.result.method.annotation.AbstractNamedValueArgumentResolver.handleMissingValue.

Doc from org.springframework.web.reactive.result.method.annotation.AbstractNamedValueArgumentResolver.handleMissingValue.

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

Parameters
name:String

the name for the value

parameter:MethodParameter

the method parameter

Annotations
@Override
resolveNamedValueback to summary
protected Object resolveNamedValue(String name, MethodParameter parameter, ServerWebExchange exchange)

Implements abstract org.springframework.web.reactive.result.method.annotation.AbstractNamedValueSyncArgumentResolver.resolveNamedValue.

Doc from org.springframework.web.reactive.result.method.annotation.AbstractNamedValueSyncArgumentResolver.resolveNamedValue.

Actually resolve the value synchronously.

Annotations
@Override
supportsParameterback to summary
public boolean supportsParameter(MethodParameter param)

Implements org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver.supportsParameter.

Doc from org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver.supportsParameter.

Whether this resolver supports the given method parameter.

Parameters
param:MethodParameter

the method parameter

Annotations
@Override
org.springframework.web.reactive.result.method.annotation back to summary

private final Class ExpressionValueMethodArgumentResolver.ExpressionValueNamedValueInfo

extends NamedValueInfo
Class Inheritance

Constructor Summary

AccessConstructor and Description
private
ExpressionValueNamedValueInfo(Value annotation)

Constructor Detail

ExpressionValueNamedValueInfoback to summary
private ExpressionValueNamedValueInfo(Value annotation)