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https://issues.apache.org/jira/browse/CXF-4473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13435201#comment-13435201
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Chris Eineke commented on CXF-4473:
-----------------------------------

I should explain my goals here.

a) Provide "/users/{username}/foo" resource to GET and POST toward a single 
user entity.

  @GET @Path("/users/{username}/foo")
  public Foo getFooOfUser(@PathParam("username") @DefaultValue("") String 
username)

  @POST @Path("/users/{username}/foo")
  public Foo postFooOfUser(@PathParam("username") @DefaultValue("") String 
username)

b) Provide "/users/{usernames}/foo" resource to GET and POST towards multiple 
user entities.

  @GET @Path("/users/{username}/foo")
  public List<Foo> getFooOfUsers(@MatrixParam("username") List<String> 
usernames)

  @POST @Path("/users/{username}/foo")
  public List<Foo> postFooOfUsers(@MatrixParam("username") List<String> 
usernames, List<Foo> foos)

This is of course wrong, because matrix params aren't path params.

  

                
> PathParam null when @Path annotations are the same
> --------------------------------------------------
>
>                 Key: CXF-4473
>                 URL: https://issues.apache.org/jira/browse/CXF-4473
>             Project: CXF
>          Issue Type: Bug
>          Components: JAX-RS
>    Affects Versions: 2.5.4
>         Environment: java version "1.6.0_24"
> OpenJDK Runtime Environment (IcedTea6 1.11.3) (6b24-1.11.3-1ubuntu0.12.04.1)
> OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
>            Reporter: Chris Eineke
>
> For some reason, the JAX-RS runtime doesn't provide the value of a 
> @GET-annotated method and @PathParam-annotated method parameter if another 
> @PUT-annotated method with the same @ParamParam-annotated method parameter 
> has the same @Path annotation:
>   @GET @Path("/users/{username}/foo")
>   public Foo getFoo(
>     @PathParam("username") String username)
>   @PUT @Path("/users/{username}/foo")
>   public Foo setFoo(
>     @PathParam("username") String username,
>     Foo foo)
> The runtime correctly invokes the first method for a GET. If I change the 
> last path segment of the first method to anything but "foo", the runtime will 
> provide the method parameter properly, but if I keep them the same the value 
> of username will always be null.

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