public class ExpressionValueMethodArgumentResolver extends AbstractNamedValueMethodArgumentResolver
@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.
A WebDataBinder may be invoked to apply type conversion to
resolved argument value.
AbstractNamedValueMethodArgumentResolver.NamedValueInfo| Constructor and Description |
|---|
ExpressionValueMethodArgumentResolver(org.springframework.beans.factory.config.ConfigurableBeanFactory beanFactory) |
| Modifier and Type | Method and Description |
|---|---|
protected AbstractNamedValueMethodArgumentResolver.NamedValueInfo |
createNamedValueInfo(org.springframework.core.MethodParameter parameter)
Create the
AbstractNamedValueMethodArgumentResolver.NamedValueInfo object for the given method parameter. |
protected void |
handleMissingValue(String name,
org.springframework.core.MethodParameter parameter)
Invoked when a named value is required, but
AbstractNamedValueMethodArgumentResolver.resolveName(String, MethodParameter, NativeWebRequest)
returned null and there is no default value. |
protected Object |
resolveName(String name,
org.springframework.core.MethodParameter parameter,
NativeWebRequest webRequest)
Resolves the given parameter type and value name into an argument value.
|
boolean |
supportsParameter(org.springframework.core.MethodParameter parameter)
Whether the given method parameter is
supported by this resolver.
|
handleResolvedValue, resolveArgumentpublic ExpressionValueMethodArgumentResolver(org.springframework.beans.factory.config.ConfigurableBeanFactory beanFactory)
beanFactory - a bean factory to use for resolving ${...}
placeholder and #{...} SpEL expressions in default values;
or null if default values are not expected to contain expressionspublic boolean supportsParameter(org.springframework.core.MethodParameter parameter)
HandlerMethodArgumentResolverparameter - the method parameter to checktrue if this resolver supports the supplied parameter;
false otherwiseprotected AbstractNamedValueMethodArgumentResolver.NamedValueInfo createNamedValueInfo(org.springframework.core.MethodParameter parameter)
AbstractNamedValueMethodArgumentResolverAbstractNamedValueMethodArgumentResolver.NamedValueInfo object for the given method parameter. Implementations typically
retrieve the method annotation by means of MethodParameter.getParameterAnnotation(Class).createNamedValueInfo in class AbstractNamedValueMethodArgumentResolverparameter - the method parameterprotected Object resolveName(String name, org.springframework.core.MethodParameter parameter, NativeWebRequest webRequest) throws Exception
AbstractNamedValueMethodArgumentResolverresolveName in class AbstractNamedValueMethodArgumentResolvername - the name of the value being resolvedparameter - the method parameter to resolve to an argument valuewebRequest - the current requestnullException - in case of errorsprotected void handleMissingValue(String name, org.springframework.core.MethodParameter parameter) throws ServletException
AbstractNamedValueMethodArgumentResolverAbstractNamedValueMethodArgumentResolver.resolveName(String, MethodParameter, NativeWebRequest)
returned null and there is no default value. Subclasses typically throw an exception in this case.handleMissingValue in class AbstractNamedValueMethodArgumentResolvername - the name for the valueparameter - the method parameterServletException