public class PathVariableMethodArgumentResolver extends AbstractNamedValueMethodArgumentResolver
PathVariable.
An @PathVariable is a named value that gets resolved from a URI
template variable. It is always required and does not have a default value
to fall back on. See the base class
AbstractNamedValueMethodArgumentResolver
for more information on how named values are processed.
If the method parameter type is Map, the name specified in the
annotation is used to resolve the URI variable String value. The value is
then converted to a Map via type conversion assuming a suitable
Converter or PropertyEditor has been registered.
Or if the annotation does not specify name the
RequestParamMapMethodArgumentResolver is used instead to provide
access to all URI variables in a map.
A WebDataBinder is invoked to apply type conversion to resolved path variable values that
don't yet match the method parameter type.
AbstractNamedValueMethodArgumentResolver.NamedValueInfo| Constructor and Description |
|---|
PathVariableMethodArgumentResolver() |
| Modifier and Type | Method and Description |
|---|---|
protected AbstractNamedValueMethodArgumentResolver.NamedValueInfo |
createNamedValueInfo(MethodParameter parameter)
Create the
AbstractNamedValueMethodArgumentResolver.NamedValueInfo object for the given method parameter. |
protected void |
handleMissingValue(String name,
MethodParameter param)
Invoked when a named value is required, but
AbstractNamedValueMethodArgumentResolver.resolveName(String, MethodParameter, NativeWebRequest)
returned null and there is no default value. |
protected void |
handleResolvedValue(Object arg,
String name,
MethodParameter parameter,
ModelAndViewContainer mavContainer,
NativeWebRequest request)
Invoked after a value is resolved.
|
protected Object |
resolveName(String name,
MethodParameter parameter,
NativeWebRequest request)
Resolves the given parameter type and value name into an argument value.
|
boolean |
supportsParameter(MethodParameter parameter)
Whether the given method parameter is
supported by this resolver.
|
resolveArgumentpublic boolean supportsParameter(MethodParameter parameter)
HandlerMethodArgumentResolverparameter - the method parameter to checktrue if this resolver supports the supplied parameter;
false otherwiseprotected AbstractNamedValueMethodArgumentResolver.NamedValueInfo createNamedValueInfo(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, MethodParameter parameter, NativeWebRequest request) throws Exception
AbstractNamedValueMethodArgumentResolverresolveName in class AbstractNamedValueMethodArgumentResolvername - the name of the value being resolvedparameter - the method parameter to resolve to an argument valuerequest - the current requestnullException - in case of errorsprotected void handleMissingValue(String name, MethodParameter param) throws ServletRequestBindingException
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 valueparam - the method parameterServletRequestBindingExceptionprotected void handleResolvedValue(Object arg, String name, MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest request)
AbstractNamedValueMethodArgumentResolverhandleResolvedValue in class AbstractNamedValueMethodArgumentResolverarg - the resolved argument valuename - the argument nameparameter - the argument parameter typemavContainer - the ModelAndViewContainer, which may be nullrequest - the current request