Re: [Resteasy-developers] PathSegment issues

[Morch H. (Nokia-LC/Schwalbach) <hol...@no...>]

Hi David,

Try this:

@GET
@Path("/{book:book}")
public String getBook(@PathParam("book") PathSegment book) {
        for (Entry<String, Object> e : book.getMatrixParameters().entrySet())
                System.out.println(e.getKey() + " = " + e.getValue());
}

Calling GET http://host.com/library/book;name=EJB 3.0;author=Bill Burke
Will print out:
name = EJB 3.0
Author = Bill Burke

Explanation:
You need segment identifier to get a PathSegment parameter filled. So I define one named "book" (before the colon) and add a regular expression which matches only "book" (part after the colon). Now I can define a parameter of type PathSegment with @PathParam annotation and use the getMatrixParameters of it to receive all matrix params.

Note:
Also this is the only way to make sure the matrix param was part of a particular segment.
Using this method:
@GET
@Path("/book/id/whatever")
public String getBook(@MatrixParam("author") String autor) {...}

Will work for all this URLs the same way:
GET http://host.com/library/book;author=Bill Burke/id/whatever
GET http://host.com/library/book/id;author=Bill Burke/whatever
GET http://host.com/library/book/id /whatever;author=Bill Burke
You will never know if the "author" MatrixParam was part of book, id or whatever segment.

Kind regards,
Holger

-----Original Message-----
From: David Kaspar [mailto:David.Kaspar@Gamesys.co.uk]
Sent: Mittwoch, 24. Oktober 2012 14:51
To: Bill Burke; res...@li...
Subject: Re: [Resteasy-developers] PathSegment issues

Thanks for the reply Bill.

Our requirement is to accept an arbitrary set of name-value set pairs. My understanding is that with MatrixParam you actually have to know the name of the key whereas with PathSegment you don't.

I tried to use PathSegment as shown in the documentation but it didn't behave as documented which is why am wondering whether the documentation is incorrect:

@GET
@Path("/book/{id}")
public String getBook(@PathParam("id") PathSegment id) {...}

And the given url is
GET http://host.com/library/book;name=EJB 3.0;author=Bill Burke

Using the above example mentioned in the reasteasy docs I get a 404.

I have to use this url to get an answer:
GET http://host.com/library/book/id;name=EJB 3.0;author=Bill Burke


david


--
David Kaspar






On 23/10/2012 19:27, "Bill Burke" <bb...@re...> wrote:

>
>
>On 10/23/2012 12:01 PM, David Kaspar wrote:
>> I am trying to use PathSegment to receive "?an arbitrary set of
>> name-value pairs embedded in a uri path segment". I am following this
>> documentation:
>>
>>
>>http://docs.jboss.org/resteasy/docs/2.3.5.Final/userguide/html_single/
>>#_P
>>athParam_and_PathSegment
>>
>> The endpoint in the example is defined as @GET
>> @Path("/book/{id}")
>> public String getBook(@PathParam("id") PathSegment id) {...}
>>
>> And the given url is
>> GET http://host.com/library/book;name=EJB 3.0;author=Bill Burke
>>
>> The problem is that this url format doesn't work for us (404, the
>> endpoint is not found). To make it work we had to include the / and a
>> placeholder like so:
>> GET http://host.com/library/book/id;name=EJB 3.0;author=Bill Burke
>>
>> Is the documentation correct and we are misusing PathSegment or is
>> the documentation incorrect?
>>
>
>You are misunderstanding how path expressions work
>
>@Path("/book/{id}") expects a segment after /book.
>
>I'd suggest an additional new method:
>
>@Path("/book")
>public String getBook(@MatixParam("name") String name,
>@MatrixParam("author") String author) {...}
>
>FYI, I don't use matrix parameters anymore.  I've found that some
>non-Java URI parsing APIs don't parse them very well (particularly
>Python).  I'd suggest using query parameters.
>
>--
>Bill Burke
>JBoss, a division of Red Hat
>http://bill.burkecentral.com
>
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