Hi Paul,
Thanks for explanation.
But I did not understand this part at the documentation.
The @FormParam annotation is special and may only be utilized on resource
and sub-resource methods. This is because it extracts information from a
request entity.
What is making it special? I really need such a thing because I am
considering to use jersey with a template engine. Defining annotation
driven reusable form components will decrease my development time greatly.
I tried to make a injector but I have not been successful yet.
Thanks
Paul Sandoz wrote:
>
> Hi,
>
> Injection of form parameters using @FormParam is currently only
> supported for parameters of resource methods that consume the media
> type application/x-www-form-urlencoded.
>
> Form parameters are different from other parameters. The latter are
> independent of any request entity (well strictly speaking some request
> headers might not be). IMHO it is not advisable to mix the two layers.
>
> I think what you require is support for form parameter beans, there is
> an open issue for this:
>
> https://jersey.dev.java.net/issues/show_bug.cgi?id=125
>
> I think we need something like @FormParamBean annotation that can be
> utilized on a resource method parameter. We could also support
> @ParamBean for simplifying the case of other parameters. Such
> instantiated beans would not obey any life-cycle rules.
>
> Having thought about it a bit more it should be fairly easy to
> implement this (including support for constructor injection). I will
> try tomorrow.
>
> Paul.
>
> On Nov 12, 2009, at 2:53 PM, Cemo Koc wrote:
>
>>
>> Hi all and Paul :) ,
>>
>> My aim is wrapping my form parameters such this:
>>
>> public class Sample {
>>
>> @FormParam("param1")
>> String s;
>>
>> @QueryParam("x")
>> String x;
>> }
>>
>>
>> I intuitively implemented such a thing with @Component and expected
>> to work
>> correctly. But my both parameters has not been set.
>>
>>
>> @Component
>> public class SpringSample {
>> @FormParam("param1")
>> String s;
>>
>> @QueryParam("x")
>> String x;
>> }
>>
>> 1) My first question, what can I do work it correctly? (I believe
>> that it
>> is difficult)
>>
>>
>> ---
>>
>> My second attempt tried to use native Jersey as in some source codes I
>> found.
>>
>> @Target({ElementType.PARAMETER, ElementType.METHOD,
>> ElementType.FIELD})
>> @Retention(RetentionPolicy.RUNTIME)
>> @Documented
>> public @interface FormContainerParam {
>>
>> }
>>
>>
>>
>> @Provider
>> public class FormContainerParamInjector implements
>> InjectableProvider<FormContainerParam, Type> {
>>
>> private final ResourceContext rc;
>>
>> public FormContainerParamInjector(@Context ResourceContext rc) {
>> this.rc = rc;
>> }
>>
>> public ComponentScope getScope() {
>> return ComponentScope.PerRequest;
>> }
>>
>> public Injectable getInjectable(ComponentContext ic,
>> FormContainerParam
>> a, Type type) {
>> if (type instanceof Class) {
>> final Class c = (Class) type;
>>
>> return new Injectable() {
>> public Object getValue() {
>> return rc.getResource(c);
>> }
>> };
>> }
>>
>> return null;
>> }
>> }
>>
>>
>>
>>
>>
>> public Response pickAdvertiser( @FormContainerParam Sample s,
>> @FormParam("param1") String userId,
>> @DefaultValue("1") @FormParam("deneme")
>> Integer count) {
>>
>> //........................
>>
>> }
>>
>>
>> In this case,
>>
>> the instance variable of Sample class @FormParam("param1") String
>> s can
>> not be injected, but other QueryParam successfully injected. And at
>> the same
>> time, the method parameter param1 can be injected successfully.
>>
>> 2) My second question is that what is the solution for such
>> implementation?
>> Why my formParam can not be injected into my instance variable.
>>
>>
>>
>> Thanks
>> --
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>> http://n2.nabble.com/FormParam-problem-in-InjectableProvider-and-Spring-tp3992897p3992897.html
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>>
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>
>
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