Re: JSON DS & Data-Into

[Scott Klement <rpg400-l@xxxxxxxxxxxxxxxx>]

Your JSON document is difficult to read (I think the e-mail software is 
causing havok with it, converting things to links, html, etc).

But, I think the basic mistake you're making is trying to treat this as 
3 different documents, instead of one document.

The structure should be:

dcl-ds MyJsonDoc qualified;
   dcl-ds documentHistoryEvents dim(100);
      // subfields here
   end-ds;
   dcl-ds participants dim(100);
       // subfields here
   end-ds;
   status char(20);
   documentKey char(50);
end-ds;

Notice how documentHistoryEvents, participants, status and documentKey 
are all subfields of a data structure?  that's because in your JSON 
document you have this:

{
  "documentHistoryEvents": <value>,
  "particpants": <value>,
  "status": <value>,.
  "documentKey": <value>
}

The curly braces basically mean "data structure", so the fact that the 
whole thing is inside a set of { and } characters mean that your whole 
RPG result must also be in a data structure. Yes, I know the outermost 
curly braces don't have any name assigned to them, that's normal (and in 
fact is always the case in JSON, the outermost element cannot have a 
name in JSON).   That's ok, you can call it whatever you like on the RPG 
side (I used "MyJsonDoc", above.)

Then code:

data-into MyJsonDoc %data(ResponseStr:'case=convert') %parser('YAJLINTO');

Though, you may want to use countprefix to determine how many 
documentHistoryEvents and participants you received.

What it all boils down to is this:  the RPG structure must match the 
JSON document structure.

-SK


On 5/8/2019 12:47 PM, Jack Prucha wrote:
> Hopefully someone can help me with the various DS definitions and the necessary parameters on the Data-Into command.
>
> This is my first experience with JSON as the web guy asked if we can read it or does he have to create another flat file.
>
> This was partially working when I first put together a test pgm using Scott's YAJL and the various subprocedure calls to process JSON.  I got the Data-Into PTFs installed (7.3), switched the parser to YAJLINTO and now I'm realizing that my JSON document is complex.  There are three JSON "objects" or data structures in the incoming document.  It doesn't matter if I have to process the document three times or can do it all once.
>
> The document looks like this:
>
> {"documentHistoryEvents":[{"type":"Created","date":"2019-04-01T20:33:13.485564Z","description":"Created by external_web_esig@xxxxxxx","participantEmail":"external_web_esig@xxxxxxx","actingUserIpAddress":"66.194.20.120"},{"type":"Sent","date":"2019-04-01T20:33:15.048387Z","description":"Sent<mailto:external_web_esig@xxxxxxx%22,%22participantEmail%22:%22external_web_esig@xxxxxxx%22,%22actingUserIpAddress%22:%2266.194.20.120%22%7d,%7b%22type%22:%22Sent%22,%22date%22:%222019-04-01T20:33:15.048387Z%22,%22description%22:%22Sent> by external_web_esig@xxxxxxx","participantEmail":"external_web_esig@xxxxxxx","actingUserIpAddress":"66.194.20.120"},{"type":"Viewed","date":"2019-04-01T20:33:40.774774Z","description":"Viewed<mailto:external_web_esig@xxxxxxx%22,%22participantEmail%22:%22external_web_esig@xxxxxxx%22,%22actingUserIpAddress%22:%2266.194.20.120%22%7d,%7b%22type%22:%22Viewed%22,%22date%22:%222019-04-01T20:33:40.774774Z%22,%22description%22:%22Viewed> by test@xxxxxxx","participa!
>   ntEmail":
>   "test@xxxxxxx","actingUserIpAddress":"66.194.20.120"}],"participants":[{"email":"external_web_esig@xxxxxxx","name":"Program<mailto:test@xxxxxxx%22,%22participantEmail%22:%22test@xxxxxxx%22,%22actingUserIpAddress%22:%2266.194.20.120%22%7d],%22participants%22:[%7b%22email%22:%22external_web_esig@xxxxxxx%22,%22name%22:%22Program> Administrator"},{"email":"external_web_esig@xxxxxxx<mailto:external_web_esig@xxxxxxx>","name":"Program Administrator"},{"email":"test@xxxxxxx<mailto:test@xxxxxxx>","name":"SMILEY ALMENDAREZ"}],"status":"Viewed","documentKey":"Lzq8e8o8tmFYi2viZphuHh"}
>
> There's a documentHistoryEvents, participants, and an unnamed object.  It's formatted correctly as I had the web guy show me using one of the online formatters.
>
> My Data structures and code are defined as follow:
>
>         Dcl-ds documentHistoryEvents Dim(100) Qualified;
>             Type                Char(20);
>             Date                Char(28);
>             Description         Char(50);
>             ParticipantEmail    Char(50);
>             ActingUserIPAddress Char(50);
>         End-Ds;
>
>         Dcl-ds participants Dim(100) Qualified;
>             EMail               Char(50);
>             name                Char(50);
>         End-Ds;
>
>         Dcl-ds DocStatus Qualified;
>             status              Char(20);
>             documentKey         Char(50);
>         End-Ds;
>
>         Dcl-s ResponseStr VarChar(16000000);
>
>           // Load JSON Document into DS
>           Data-Into documentHistoryEvents %Data(ResponseStr:'Case=Any -
>             Doc=String ')
>             %Parser('YAJLINTO');
>
> ResponseStr has the JSON loaded from a website using an HTTP call.  I've tried processing just the documentHistoryEvents document using combinations of path, allowextra and countprefix options, but I keep getting RNX0356 reason code 5 when executing.   I understand the layouts of the DS should match the JSON fields but not sure what to do with multiple documents and an unnamed document.
>
> TIA
> Jack Prucha
> Programming Team Supervisor
>
> College Foundation, Inc.
> Office Phone: 919.835.2530
>
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