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From: Robby Pelssers <Robby.Pelssers@nxp.com>
To: "users@cocoon.apache.org" <users@cocoon.apache.org>,
        "Andre.Juffer@oulu.fi" <Andre.Juffer@oulu.fi>
Date: Tue, 20 Sep 2011 10:22:52 +0200
Subject: RE: Cocoon3: string-template; collections
Thread-Topic: Cocoon3: string-template; collections
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 definitions=2011-09-20_02:2011-09-20,2011-09-20,1970-01-01 signatures=0

Hi Andre,

I found some example online but I haven't tested it personally. The example=
 the syntax how to iterate


<ul>
    $orders: {order|
        <li>Order $order.OrderId$</li>
    }$
</ul>

Let me know if that works out for you.

Robby

-----Original Message-----
From: Andre Juffer [mailto:ajuffer@cc.oulu.fi]=20
Sent: Tuesday, September 20, 2011 10:15 AM
To: Cocoon Users
Subject: Cocoon3: string-template; collections

Hi,

I am dealing with the following. I created a simple REST resource, like=20
(without setters):

@Path("/test")
public class TestResource {

     @GET
     @Path("/{id}")
     public Response getTest(@PathParam("id") String id)
     {
         TestDTO testDTO =3D this.testFacade.find(id);
         Map<String, Object> map =3D new HashMap<String, Object>();
         map.put("test", testDTO);
         return=20
URLResponseBuilder.newInstance("servlet:tribc-tct:/test.json", map).build()=
;
     }
}

The TestFacade returns a DTO (data transfer object) and this DTO exposes=20
a number of getters. The application must be able to return both XML and=20
JSON. So, I place the DTO in a map and 'call' the sitemap for generated=20
the response (here as JSON):

<map:match pattern=3D"*.json">
   <map:generate type=3D"string-template" src=3D"xml/{map:1}.xml" />
   <map:transform src=3D"xsl/xml2json.xsl" />
   <map:transform type=3D"logasxml"/>
   <map:transform type=3D"log"/>
   <map:serialize type=3D"json" />  <!-- This serializer is my own -->
</map:match>

The test.xml looks like:

<test>
     <testId>$test.testId$</testId>
     <name>$test.name$</name>
     <!-- and more ...->
</test>

You can see that the DTO that was stored in the map is used in the=20
test.xml to create an XML representation of the DTO. The above works=20
fine (see StringTemplate [1]). The XML is subsequently transformed to JSON.

My problem is now how to use string-template when dealing with a=20
collection. That is, the TestFacade returns a collection of DTOs=20
(Collecton<TestDTO>), for which I need to make an XML (or JSON)=20
representation, like:

<tests>
   <test>...</test>
   <test>...</test>
</tests>

My question: How to iterate through a collection of objects with=20
string-template to create the above, if the collection is stored in a=20
map. The StringTemplate pages are not very easy to read and I did not=20
really find a clue how to handle this particular problem. In cocoon 2.2=20
one could use <jx:forEach ...>, which was extremely convenient. I was=20
hoping that there is a simular way with string-template.

Thanks for any help,

--=20
Andre H. Juffer              | Phone: +358-8-553 1161
Biocenter Oulu and           | Fax: +358-8-553-1141
Department of Biochemistry   | Email: andre.juffer@oulu.fi
University of Oulu, Finland  | WWW: www.biochem.oulu.fi/Biocomputing/
StruBioCat                   | WWW: www.strubiocat.oulu.fi
NordProt                     | WWW: www.nordprot.org
Triacle Biocomputing         | WWW: www.triacle-bc.com

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