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Subject: Re: Using REST api with UIMA
To: user@uima.apache.org
References: <pony-74e6686617f3aa47a64d7b1d024fc6f80fda271e-ca04db9a7f72df4dc08178ecf52aaca0a261fc7d@user.uima.apache.org>
From: Marshall Schor <msa@schor.com>
Message-ID: <05c1546e-8093-0cb9-66a6-3bb6b2c32d11@schor.com>
Date: Thu, 4 May 2017 10:37:36 -0400
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archived-at: Thu, 04 May 2017 14:37:42 -0000

The core UIMA support has not (yet) implemented a deserializer back into CAS
form, for this. 

The main idea behind CAS -> JSON conversion was to provide the CAS info to JSON
Consumers.

We have multiple other serializations (CAS -> XMI, etc.) that are designed for
"transport" and include deserializers.

Of course, it is quite possible to create an addition to UIMA which can
deserialize the JSON format(s) - that just hasn't yet been done. Contributions
welcome!

-Marshall


On 5/4/2017 3:49 AM, Luca Toldo wrote:
> The following Java code (inspired from http://stackoverflow.com/questions/40838999/getting-output-in-json-format-in-uima ) 
>
> import java.io.*;
> import org.apache.uima.fit.factory.JCasFactory;
> import org.apache.uima.jcas.JCas;
> import org.apache.uima.cas.CAS;
> import org.apache.uima.json.JsonCasSerializer;
> public class  test {
>         public static void main(String [] args ) throws IOException {
>                 try {
>                         String note="Lorem ipsum incididunt ut labore et dolore magna aliqua";
>                         JCas jcas = JCasFactory.createJCas();
>                         jcas.setDocumentText(note);
>                         JsonCasSerializer jcs = new JsonCasSerializer();
>                         jcs.setPrettyPrint(true); 
>                         StringWriter sw = new StringWriter();
>                         CAS cas = jcas.getCas();
>                         jcs.serialize(cas, sw); 
>                         System.out.println(sw.toString());
>                 } catch (Exception ex) {
>                 }
>         }
> }
>
>
> delivers properly formatted JSON CAS:
>
> {"_context" : {
>     "_types" : {
>       "DocumentAnnotation" : {"_id" : "uima.tcas.DocumentAnnotation", 
>         "_feature_types" : {"sofa" : "_ref" } }, 
>       "Sofa" : {"_id" : "uima.cas.Sofa", 
>         "_feature_types" : {"sofaArray" : "_ref" } }, 
>       "Annotation" : {"_id" : "uima.tcas.Annotation", 
>         "_feature_types" : {"sofa" : "_ref" }, 
>         "_subtypes" : ["DocumentAnnotation" ] }, 
>       "AnnotationBase" : {"_id" : "uima.cas.AnnotationBase", 
>         "_feature_types" : {"sofa" : "_ref" }, 
>         "_subtypes" : ["Annotation" ] }, 
>       "TOP" : {"_id" : "uima.cas.TOP", 
>         "_subtypes" : ["AnnotationBase",  "Sofa" ] } } }, 
>   "_views" : {
>     "_InitialView" : {
>       "DocumentAnnotation" : [
>         {"sofa" : 1,  "begin" : 0,  "end" : 55,  "language" : "x-unspecified" } ] } }, 
>   "_referenced_fss" : {
>     "1" : {"_type" : "Sofa",  "sofaNum" : 1,  "sofaID" : "_InitialView",  "mimeType" : "text",  "sofaString" : "Lorem ipsum incididunt ut labore et dolore magna aliqua" } } }
>
> How to deserialize that back into CAS object ?
>