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parser.cpp
1 /* This file is part of QJson
2  *
3  * Copyright (C) 2008 Flavio Castelli <flavio.castelli@gmail.com>
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Library General Public
7  * License as published by the Free Software Foundation; either
8  * version 2 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Library General Public License for more details.
14  *
15  * You should have received a copy of the GNU Library General Public License
16  * along with this library; see the file COPYING.LIB. If not, write to
17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18  * Boston, MA 02110-1301, USA.
19  */
20 
21 #include "parser.h"
22 #include "parser_p.h"
23 #include "json_parser.hh"
24 #include "json_scanner.h"
25 
26 #include <QtCore/QBuffer>
27 #include <QtCore/QStringList>
28 #include <QtCore/QTextStream>
29 #include <QtCore/QDebug>
30 
31 using namespace QJson;
32 
33 ParserPrivate::ParserPrivate() :
34  m_scanner(0)
35  , m_negate(false)
36  , m_error(false)
37 {
38 }
39 
40 ParserPrivate::~ParserPrivate()
41 {
42  delete m_scanner;
43 }
44 
45 void ParserPrivate::setError(QString errorMsg, int errorLine) {
46  m_error = true;
47  m_errorMsg = errorMsg;
48  m_errorLine = errorLine;
49 }
50 
51 Parser::Parser() :
52  d(new ParserPrivate)
53 {
54 }
55 
56 Parser::~Parser()
57 {
58  delete d;
59 }
60 
61 QVariant Parser::parse (QIODevice* io, bool* ok)
62 {
63  d->m_errorMsg.clear();
64  delete d->m_scanner;
65  d->m_scanner = 0;
66 
67  if (!io->isOpen()) {
68  if (!io->open(QIODevice::ReadOnly)) {
69  if (ok != 0)
70  *ok = false;
71  qCritical ("Error opening device");
72  return QVariant();
73  }
74  }
75 
76  if (!io->isReadable()) {
77  if (ok != 0)
78  *ok = false;
79  qCritical ("Device is not readable");
80  io->close();
81  return QVariant();
82  }
83 
84  d->m_scanner = new JSonScanner (io);
85  yy::json_parser parser(d);
86  parser.parse();
87 
88  delete d->m_scanner;
89  d->m_scanner = 0;
90 
91  if (ok != 0)
92  *ok = !d->m_error;
93 
94  io->close();
95  return d->m_result;
96 }
97 
98 QVariant Parser::parse(const QByteArray& jsonString, bool* ok) {
99  QBuffer buffer;
100  buffer.open(QBuffer::ReadWrite);
101  buffer.write(jsonString);
102  buffer.seek(0);
103  return parse (&buffer, ok);
104 }
105 
106 QString Parser::errorString() const
107 {
108  return d->m_errorMsg;
109 }
110 
111 int Parser::errorLine() const
112 {
113  return d->m_errorLine;
114 }

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