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Date: Thu, 7 Jun 2018 22:52:54 -0700 (PDT)
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Subject: GNATCOLL JSON Parsing
From: eduardsapotski@gmail.com
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Xref: reader02.eternal-september.org comp.lang.ada:52983
Date: 2018-06-07T22:52:54-07:00
List-Id: <comp.lang.ada>

I try understand parsing JSON in Ada. 

For example:
Have web-api that gives simple JSON: http://api.exmo.com/v1/trades/?pair=BTC_USD&limit=10

I need to save this data to database.
Created type:

   type Money is delta 0.00000001 range 0.0 .. 9_999_999_999.9;
   type UTC_Date is range 1_500_000_000 .. 3_000_000_000;

   type Trade is record

      Trade_Id   : Integer;
      Pair       : Unbounded_String;
      Trade_Type : Unbounded_String;
      Price      : Money;
      Quantity   : Money;
      Amount     : Money;
      Date       : UTC_Date;
      Saved      : Boolean;

   end record;

Created collection:

    package Vector_Trades is new Ada.Containers.Vectors(Natural, Trade);

    Trades : Vector_Trades.Vector;

Receive data:

JSON : Unbounded_String;

JSON := To_Unbounded_String(AWS.Response.Message_Body (AWS.Client.Get (URL => "http://api.exmo.com/v1/trades/?pair=BTC_USD&limit=10")));

What to do next? How to get list of objects from the JSON-text?

How to save data to database already understood.

Thanks.