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127 | -----------------------------------------------------------------------
-- json -- JSON Reader
-- Copyright (C) 2010, 2011, 2014, 2017 Stephane Carrez
-- Written by Stephane Carrez (Stephane.Carrez@gmail.com)
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
-----------------------------------------------------------------------
with Ada.Strings.Unbounded;
with Ada.Text_IO;
with Ada.Command_Line;
with Util.Serialize.IO.JSON;
with Ada.Containers;
with Mapping;
with Util.Serialize.Mappers.Vector_Mapper;
with Util.Streams.Texts;
with Util.Streams.Buffered;
procedure Json is
use Util.Streams.Buffered;
use Ada.Strings.Unbounded;
use type Mapping.Person_Access;
use type Ada.Containers.Count_Type;
use Mapping;
Reader : Util.Serialize.IO.JSON.Parser;
Mapper : Util.Serialize.Mappers.Processing;
Count : constant Natural := Ada.Command_Line.Argument_Count;
package Person_Vector_Mapper is
new Util.Serialize.Mappers.Vector_Mapper (Vectors => Person_Vector,
Element_Mapper => Person_Mapper);
subtype Person_Vector_Context is Person_Vector_Mapper.Vector_Data;
-- Mapping for a list of Person records (stored as a Vector).
Person_Vector_Mapping : aliased Person_Vector_Mapper.Mapper;
procedure Print (P : in Mapping.Person_Vector.Cursor);
procedure Print (P : in Mapping.Person);
procedure Print (P : in Mapping.Person) is
begin
Ada.Text_IO.Put_Line ("Name : " & To_String (P.Name));
Ada.Text_IO.Put_Line ("first_name : " & To_String (P.First_Name));
Ada.Text_IO.Put_Line ("last_name : " & To_String (P.Last_Name));
Ada.Text_IO.Put_Line ("Age : " & Natural'Image (P.Age));
Ada.Text_IO.Put_Line ("Street : " & To_String (P.Addr.Street));
Ada.Text_IO.Put_Line ("City : " & To_String (P.Addr.City));
Ada.Text_IO.Put_Line ("Zip : " & Natural'Image (P.Addr.Zip));
Ada.Text_IO.Put_Line ("Country : " & To_String (P.Addr.Country));
Ada.Text_IO.Put_Line ("Info : " & To_String (P.Addr.Info.Name)
& "=" & To_String (P.Addr.Info.Value));
end Print;
procedure Print (P : in Mapping.Person_Vector.Cursor) is
begin
Print (Mapping.Person_Vector.Element (P));
end Print;
begin
if Count = 0 then
Ada.Text_IO.Put_Line ("Usage: json file...");
return;
end if;
Person_Vector_Mapping.Set_Mapping (Mapping.Get_Person_Mapper);
Mapper.Add_Mapping ("/list", Person_Vector_Mapping'Unchecked_Access);
Mapper.Add_Mapping ("/person", Mapping.Get_Person_Mapper.all'Access);
for I in 1 .. Count loop
declare
S : constant String := Ada.Command_Line.Argument (I);
List : aliased Mapping.Person_Vector.Vector;
P : aliased Mapping.Person;
begin
Person_Vector_Mapper.Set_Context (Mapper, List'Unchecked_Access);
Mapping.Person_Mapper.Set_Context (Mapper, P'Unchecked_Access);
Reader.Parse (S, Mapper);
-- The list now contains our elements.
List.Iterate (Process => Print'Access);
if List.Length = 0 then
Print (P);
end if;
declare
Buffer : aliased Util.Streams.Buffered.Output_Buffer_Stream;
Print : aliased Util.Streams.Texts.Print_Stream;
Output : Util.Serialize.IO.JSON.Output_Stream;
begin
Buffer.Initialize (Size => 10000);
Print.Initialize (Buffer'Unchecked_Access);
Output.Initialize (Print'Unchecked_Access);
Mapping.Get_Person_Mapper.Write (Output, P);
Ada.Text_IO.Put_Line ("Person: "
& Util.Streams.Texts.To_String (Print));
end;
declare
Buffer : aliased Util.Streams.Buffered.Output_Buffer_Stream;
Print : aliased Util.Streams.Texts.Print_Stream;
Output : Util.Serialize.IO.JSON.Output_Stream;
begin
Buffer.Initialize (Size => 10000);
Print.Initialize (Buffer'Unchecked_Access);
Output.Initialize (Print'Unchecked_Access);
Output.Write ("{""list"":");
Person_Vector_Mapping.Write (Output, List);
Output.Write ("}");
Ada.Text_IO.Put_Line ("IO:");
Ada.Text_IO.Put_Line (Util.Streams.Texts.To_String (Print));
end;
end;
end loop;
end Json;
|