1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503 | -----------------------------------------------------------------------
-- util-serialize-io-csv -- CSV Serialization Driver
-- Copyright (C) 2011, 2015, 2016, 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.Characters.Latin_1;
with Ada.IO_Exceptions;
with Util.Strings;
with Util.Dates.ISO8601;
package body Util.Serialize.IO.CSV is
-- ------------------------------
-- Set the field separator. The default field separator is the comma (',').
-- ------------------------------
procedure Set_Field_Separator (Stream : in out Output_Stream;
Separator : in Character) is
begin
Stream.Separator := Separator;
end Set_Field_Separator;
-- ------------------------------
-- Enable or disable the double quotes by default for strings.
-- ------------------------------
procedure Set_Quotes (Stream : in out Output_Stream;
Enable : in Boolean) is
begin
Stream.Quote := Enable;
end Set_Quotes;
-- ------------------------------
-- Write the value as a CSV cell. Special characters are escaped using the CSV
-- escape rules.
-- ------------------------------
procedure Write_Cell (Stream : in out Output_Stream;
Value : in String) is
begin
if Stream.Column > 1 then
Stream.Write (Stream.Separator);
end if;
Stream.Column := Stream.Column + 1;
if Stream.Quote then
Stream.Write ('"');
end if;
for I in Value'Range loop
if Value (I) = '"' then
Stream.Write ("""""");
else
Stream.Write (Value (I));
end if;
end loop;
if Stream.Quote then
Stream.Write ('"');
end if;
end Write_Cell;
procedure Write_Cell (Stream : in out Output_Stream;
Value : in Integer) is
begin
if Stream.Column > 1 then
Stream.Write (Stream.Separator);
end if;
Stream.Column := Stream.Column + 1;
Stream.Write (Util.Strings.Image (Value));
end Write_Cell;
procedure Write_Cell (Stream : in out Output_Stream;
Value : in Boolean) is
begin
if Stream.Column > 1 then
Stream.Write (Stream.Separator);
end if;
Stream.Column := Stream.Column + 1;
if Value then
Stream.Write ("true");
else
Stream.Write ("false");
end if;
end Write_Cell;
procedure Write_Cell (Stream : in out Output_Stream;
Value : in Util.Beans.Objects.Object) is
use Util.Beans.Objects;
begin
case Util.Beans.Objects.Get_Type (Value) is
when TYPE_NULL =>
if Stream.Column > 1 then
Stream.Write (Stream.Separator);
end if;
Stream.Column := Stream.Column + 1;
if Stream.Quote then
Stream.Write ("""null""");
else
Stream.Write ("null");
end if;
when TYPE_BOOLEAN =>
if Stream.Column > 1 then
Stream.Write (Stream.Separator);
end if;
Stream.Column := Stream.Column + 1;
if Util.Beans.Objects.To_Boolean (Value) then
Stream.Write ("true");
else
Stream.Write ("false");
end if;
when TYPE_INTEGER =>
if Stream.Column > 1 then
Stream.Write (Stream.Separator);
end if;
Stream.Column := Stream.Column + 1;
-- Stream.Write ('"');
Stream.Write (Util.Beans.Objects.To_Long_Long_Integer (Value));
-- Stream.Write ('"');
when others =>
Stream.Write_Cell (Util.Beans.Objects.To_String (Value));
end case;
end Write_Cell;
-- ------------------------------
-- Start a new row.
-- ------------------------------
procedure New_Row (Stream : in out Output_Stream) is
begin
while Stream.Column < Stream.Max_Columns loop
Stream.Write (Stream.Separator);
Stream.Column := Stream.Column + 1;
end loop;
Stream.Write (ASCII.CR);
Stream.Write (ASCII.LF);
Stream.Column := 1;
Stream.Row := Stream.Row + 1;
end New_Row;
-- -----------------------
-- Write the attribute name/value pair.
-- -----------------------
overriding
procedure Write_Attribute (Stream : in out Output_Stream;
Name : in String;
Value : in String) is
pragma Unreferenced (Name);
begin
Stream.Write_Cell (Value);
end Write_Attribute;
overriding
procedure Write_Wide_Attribute (Stream : in out Output_Stream;
Name : in String;
Value : in Wide_Wide_String) is
begin
null;
end Write_Wide_Attribute;
overriding
procedure Write_Attribute (Stream : in out Output_Stream;
Name : in String;
Value : in Integer) is
pragma Unreferenced (Name);
begin
Stream.Write_Cell (Value);
end Write_Attribute;
overriding
procedure Write_Attribute (Stream : in out Output_Stream;
Name : in String;
Value : in Boolean) is
pragma Unreferenced (Name);
begin
Stream.Write_Cell (Value);
end Write_Attribute;
overriding
procedure Write_Attribute (Stream : in out Output_Stream;
Name : in String;
Value : in Util.Beans.Objects.Object) is
pragma Unreferenced (Name);
begin
Stream.Write_Cell (Value);
end Write_Attribute;
procedure Write_Entity (Stream : in out Output_Stream;
Name : in String;
Value : in Util.Beans.Objects.Object) is
pragma Unreferenced (Name);
begin
Stream.Write_Cell (Value);
end Write_Entity;
-- -----------------------
-- Write the entity value.
-- -----------------------
overriding
procedure Write_Entity (Stream : in out Output_Stream;
Name : in String;
Value : in String) is
pragma Unreferenced (Name);
begin
Stream.Write_Cell (Value);
end Write_Entity;
overriding
procedure Write_Wide_Entity (Stream : in out Output_Stream;
Name : in String;
Value : in Wide_Wide_String) is
begin
null;
end Write_Wide_Entity;
overriding
procedure Write_Entity (Stream : in out Output_Stream;
Name : in String;
Value : in Boolean) is
pragma Unreferenced (Name);
begin
Stream.Write_Cell (Value);
end Write_Entity;
overriding
procedure Write_Entity (Stream : in out Output_Stream;
Name : in String;
Value : in Integer) is
pragma Unreferenced (Name);
begin
Stream.Write_Cell (Value);
end Write_Entity;
overriding
procedure Write_Entity (Stream : in out Output_Stream;
Name : in String;
Value : in Ada.Calendar.Time) is
begin
Stream.Write_Entity (Name, Util.Dates.ISO8601.Image (Value, Util.Dates.ISO8601.SUBSECOND));
end Write_Entity;
overriding
procedure Write_Long_Entity (Stream : in out Output_Stream;
Name : in String;
Value : in Long_Long_Integer) is
begin
null;
end Write_Long_Entity;
overriding
procedure Write_Enum_Entity (Stream : in out Output_Stream;
Name : in String;
Value : in String) is
begin
Stream.Write_Entity (Name, Value);
end Write_Enum_Entity;
-- ------------------------------
-- Write the attribute with a null value.
-- ------------------------------
overriding
procedure Write_Null_Attribute (Stream : in out Output_Stream;
Name : in String) is
begin
Stream.Write_Entity (Name, "");
end Write_Null_Attribute;
-- ------------------------------
-- Write an entity with a null value.
-- ------------------------------
procedure Write_Null_Entity (Stream : in out Output_Stream;
Name : in String) is
begin
Stream.Write_Null_Attribute (Name);
end Write_Null_Entity;
-- ------------------------------
-- Get the header name for the given column.
-- If there was no header line, build a default header for the column.
-- ------------------------------
function Get_Header_Name (Handler : in Parser;
Column : in Column_Type) return String is
use type Ada.Containers.Count_Type;
Default_Header : constant String := "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
Result : String (1 .. 10);
N, R : Natural;
Pos : Positive := Result'Last;
begin
if Handler.Headers.Length >= Ada.Containers.Count_Type (Column) then
return Handler.Headers.Element (Positive (Column));
end if;
N := Natural (Column - 1);
loop
R := N mod 26;
N := N / 26;
Result (Pos) := Default_Header (R + 1);
exit when N = 0;
Pos := Pos - 1;
end loop;
return Result (Pos .. Result'Last);
end Get_Header_Name;
-- ------------------------------
-- Set the cell value at the given row and column.
-- The default implementation finds the column header name and
-- invokes <b>Write_Entity</b> with the header name and the value.
-- ------------------------------
procedure Set_Cell (Handler : in out Parser;
Value : in String;
Row : in Row_Type;
Column : in Column_Type) is
use Ada.Containers;
begin
if Row = 0 then
-- Build the headers table.
declare
Missing : constant Integer := Integer (Column) - Integer (Handler.Headers.Length);
begin
if Missing > 0 then
Handler.Headers.Set_Length (Handler.Headers.Length + Count_Type (Missing));
end if;
Handler.Headers.Replace_Element (Positive (Column), Value);
end;
else
declare
Name : constant String := Handler.Get_Header_Name (Column);
begin
-- Detect a new row. Close the current object and start a new one.
if Handler.Row /= Row then
if Row > 1 then
Handler.Sink.Finish_Object ("", Handler);
else
Handler.Sink.Start_Array ("", Handler);
end if;
Handler.Sink.Start_Object ("", Handler);
end if;
Handler.Row := Row;
Handler.Sink.Set_Member (Name, Util.Beans.Objects.To_Object (Value), Handler);
end;
end if;
end Set_Cell;
-- ------------------------------
-- Set the field separator. The default field separator is the comma (',').
-- ------------------------------
procedure Set_Field_Separator (Handler : in out Parser;
Separator : in Character) is
begin
Handler.Separator := Separator;
end Set_Field_Separator;
-- ------------------------------
-- Get the field separator.
-- ------------------------------
function Get_Field_Separator (Handler : in Parser) return Character is
begin
return Handler.Separator;
end Get_Field_Separator;
-- ------------------------------
-- Set the comment separator. When a comment separator is defined, a line which starts
-- with the comment separator will be ignored. The row number will not be incremented.
-- ------------------------------
procedure Set_Comment_Separator (Handler : in out Parser;
Separator : in Character) is
begin
Handler.Comment := Separator;
end Set_Comment_Separator;
-- ------------------------------
-- Get the comment separator. Returns ASCII.NUL if comments are not supported.
-- ------------------------------
function Get_Comment_Separator (Handler : in Parser) return Character is
begin
return Handler.Comment;
end Get_Comment_Separator;
-- ------------------------------
-- Setup the CSV parser and mapper to use the default column header names.
-- When activated, the first row is assumed to contain the first item to de-serialize.
-- ------------------------------
procedure Set_Default_Headers (Handler : in out Parser;
Mode : in Boolean := True) is
begin
Handler.Use_Default_Headers := Mode;
end Set_Default_Headers;
-- ------------------------------
-- Parse the stream using the CSV parser.
-- Call <b>Set_Cell</b> for each cell that has been parsed indicating the row and
-- column numbers as well as the cell value.
-- ------------------------------
overriding
procedure Parse (Handler : in out Parser;
Stream : in out Util.Streams.Buffered.Input_Buffer_Stream'Class;
Sink : in out Reader'Class) is
use Ada.Strings.Unbounded;
C : Character;
Token : Unbounded_String;
Column : Column_Type := 1;
Row : Row_Type := 0;
In_Quote_Token : Boolean := False;
In_Escape : Boolean := False;
Ignore_Row : Boolean := False;
begin
if Handler.Use_Default_Headers then
Row := 1;
end if;
Handler.Headers.Clear;
Handler.Sink := Sink'Unchecked_Access;
loop
Stream.Read (Char => C);
if C = Ada.Characters.Latin_1.CR or C = Ada.Characters.Latin_1.LF then
if C = Ada.Characters.Latin_1.LF then
Handler.Line_Number := Handler.Line_Number + 1;
end if;
if not Ignore_Row then
if In_Quote_Token and not In_Escape then
Append (Token, C);
elsif Column > 1 or else Length (Token) > 0 then
Parser'Class (Handler).Set_Cell (To_String (Token), Row, Column);
Set_Unbounded_String (Token, "");
Row := Row + 1;
Column := 1;
In_Quote_Token := False;
In_Escape := False;
end if;
else
Ignore_Row := False;
end if;
elsif C = Handler.Separator and not Ignore_Row then
if In_Quote_Token and not In_Escape then
Append (Token, C);
else
Parser'Class (Handler).Set_Cell (To_String (Token), Row, Column);
Set_Unbounded_String (Token, "");
Column := Column + 1;
In_Quote_Token := False;
In_Escape := False;
end if;
elsif C = '"' and not Ignore_Row then
if In_Quote_Token then
In_Escape := True;
elsif In_Escape then
Append (Token, C);
In_Escape := False;
elsif Ada.Strings.Unbounded.Length (Token) = 0 then
In_Quote_Token := True;
else
Append (Token, C);
end if;
elsif C = Handler.Comment and Handler.Comment /= ASCII.NUL
and Column = 1 and Length (Token) = 0
then
Ignore_Row := True;
elsif not Ignore_Row then
Append (Token, C);
In_Escape := False;
end if;
end loop;
exception
when Ada.IO_Exceptions.Data_Error =>
Parser'Class (Handler).Set_Cell (To_String (Token), Row, Column);
Handler.Sink := null;
return;
end Parse;
-- ------------------------------
-- Get the current location (file and line) to report an error message.
-- ------------------------------
overriding
function Get_Location (Handler : in Parser) return String is
begin
return Util.Strings.Image (Handler.Line_Number);
end Get_Location;
end Util.Serialize.IO.CSV;
|