source: trunk/tools/xmlpatterns/main.cpp@ 317

Last change on this file since 317 was 2, checked in by Dmitry A. Kuminov, 16 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 14.2 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information ([email protected])
5**
6** This file is part of the Patternist project on Trolltech Labs.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial Usage
10** Licensees holding valid Qt Commercial licenses may use this file in
11** accordance with the Qt Commercial License Agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Nokia.
14**
15** GNU Lesser General Public License Usage
16** Alternatively, this file may be used under the terms of the GNU Lesser
17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
21** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
22**
23** In addition, as a special exception, Nokia gives you certain
24** additional rights. These rights are described in the Nokia Qt LGPL
25** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26** package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you are unsure which license is appropriate for your use, please
37** contact the sales department at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include <QtCore/QDir>
43#include <QtCore/QtDebug>
44#include <QtCore/QFile>
45#include <QtCore/QFileInfo>
46#include <QtCore/QStringList>
47#include <QtCore/QTextCodec>
48#include <QtCore/QTextStream>
49#include <QtCore/QUrl>
50#include <QtCore/QVariant>
51#include <QtCore/QVector>
52
53#include <QtXmlPatterns/QXmlFormatter>
54#include <QtXmlPatterns/QXmlItem>
55#include <QtXmlPatterns/QXmlQuery>
56#include <QtXmlPatterns/QXmlSerializer>
57
58#include "private/qautoptr_p.h"
59#include "qapplicationargument_p.h"
60#include "qapplicationargumentparser_p.h"
61#include "qcoloringmessagehandler_p.h"
62
63#if defined(Q_OS_WIN) && !defined(Q_OS_WINCE)
64/* Needed for opening stdout with _fdopen & friends. io.h seems to not be
65 * needed on MinGW though. */
66#include <io.h>
67#include <fcntl.h>
68#endif
69
70#include "main.h"
71
72QT_USE_NAMESPACE
73
74/* The two Q_DECLARE_METATYPE macros must appear before the code
75 * on a couple of HPUX platforms. */
76
77/*!
78 \internal
79 \since 4.4
80 Represents the name and value found in "-param name=value".
81 */
82typedef QPair<QString, QString> Parameter;
83Q_DECLARE_METATYPE(Parameter);
84
85/*!
86 \internal
87 \since 4.4
88 For the -output switch.
89 */
90Q_DECLARE_METATYPE(QIODevice *);
91
92/*!
93 \class PatternistApplicationParser
94 \brief Subclass to handle -param name=value
95 \internal
96 \since 4.4
97 \reentrant
98 */
99class PatternistApplicationParser : public QApplicationArgumentParser
100{
101public:
102 inline PatternistApplicationParser(int argc, char **argv,
103 const QXmlNamePool &np) : QApplicationArgumentParser(argc, argv)
104 , m_namePool(np)
105#ifdef Q_OS_WIN
106 , m_stdout(0)
107#endif
108 {
109 }
110
111#ifdef Q_OS_WIN
112 virtual ~PatternistApplicationParser()
113 {
114 /* QFile::~QFile() nor QFile::close() frees the handle when
115 * we use QFile::open() so we have to do it manually.
116 *
117 * "If stream is NULL, the invalid parameter handler is invoked," so
118 * lets try to avoid that. */
119 if(m_stdout)
120 fclose(m_stdout);
121 }
122#endif
123
124protected:
125 virtual QVariant convertToValue(const QApplicationArgument &arg,
126 const QString &input) const
127 {
128 if(arg.name() == QLatin1String("param"))
129 {
130 const int assign = input.indexOf(QLatin1Char('='));
131
132 if(assign == -1)
133 {
134 message(QXmlPatternistCLI::tr("Each binding must contain an equal sign."));
135 return QVariant();
136 }
137
138 const QString name(input.left(assign));
139 const QString value(input.mid(assign + 1));
140
141 if(!QXmlName::isNCName(name))
142 {
143 message(QXmlPatternistCLI::tr("The variable name must be a valid NCName, which %1 isn't.").arg(name));
144 return QVariant();
145 }
146
147 /* The value.isNull() check ensures we can bind variables whose value is an empty string. */
148 return qVariantFromValue(Parameter(name, value.isNull() ? QString(QLatin1String("")) : value ));
149 }
150 else if(arg.name() == QLatin1String("output"))
151 {
152 QFile *const f = new QFile(input);
153
154 if(f->open(QIODevice::WriteOnly))
155 return qVariantFromValue(static_cast<QIODevice *>(f));
156 else
157 {
158 message(QXmlPatternistCLI::tr("Failed to open file %1 for writing: %2").arg(f->fileName(), f->errorString()));
159 return QVariant();
160 }
161 }
162 else if(arg.name() == QLatin1String("initial-template"))
163 {
164 const QXmlName name(QXmlName::fromClarkName(input, m_namePool));
165 if(name.isNull())
166 {
167 message(QXmlPatternistCLI::tr("%1 is an invalid Clark Name").arg(input));
168 return QVariant();
169 }
170 else
171 return qVariantFromValue(name);
172 }
173 else
174 return QApplicationArgumentParser::convertToValue(arg, input);
175 }
176
177 virtual QString typeToName(const QApplicationArgument &argument) const
178 {
179 if(argument.name() == QLatin1String("param"))
180 return QLatin1String("name=value");
181 else if(argument.name() == QLatin1String("output"))
182 return QLatin1String("local file");
183 else
184 return QApplicationArgumentParser::typeToName(argument);
185 }
186
187 virtual QVariant defaultValue(const QApplicationArgument &argument) const
188 {
189 if(argument.name() == QLatin1String("output"))
190 {
191 QFile *const out = new QFile();
192
193#ifdef Q_OS_WIN
194 /* If we don't open stdout in "binary" mode on Windows, it will translate
195 * 0xA into 0xD 0xA. See Trolltech task 173619, for an example. */
196 _setmode(_fileno(stdout), _O_BINARY);
197 m_stdout = QT_WA_INLINE(_wfdopen(_fileno(stdout), L"wb"),_fdopen(_fileno(stdout), "wb"));
198 out->open(m_stdout, QIODevice::WriteOnly);
199#else
200 out->open(stdout, QIODevice::WriteOnly);
201#endif
202
203 return qVariantFromValue(static_cast<QIODevice *>(out));
204 }
205 else
206 return QApplicationArgumentParser::defaultValue(argument);
207 }
208
209private:
210 QXmlNamePool m_namePool;
211#ifdef Q_OS_WIN
212 mutable FILE * m_stdout;
213#endif
214};
215
216static inline QUrl finalizeURI(const QApplicationArgumentParser &parser,
217 const QApplicationArgument &isURI,
218 const QApplicationArgument &arg)
219{
220 QUrl userURI;
221 {
222 const QString stringURI(parser.value(arg).toString());
223
224 if(parser.has(isURI))
225 userURI = QUrl::fromEncoded(stringURI.toLatin1());
226 else
227 userURI = QUrl::fromLocalFile(stringURI);
228 }
229
230 return QUrl::fromLocalFile(QDir::current().absolutePath() + QLatin1Char('/')).resolved(userURI);
231}
232
233int main(int argc, char **argv)
234{
235 enum ExitCode
236 {
237 /**
238 * We start from 2, because QApplicationArgumentParser
239 * uses 1.
240 */
241 QueryFailure = 2,
242 StdOutFailure
243 };
244
245 const QCoreApplication app(argc, argv);
246 QCoreApplication::setApplicationName(QLatin1String("xmlpatterns"));
247
248 QXmlNamePool namePool;
249 PatternistApplicationParser parser(argc, argv, namePool);
250 parser.setApplicationDescription(QLatin1String("A tool for running XQuery queries."));
251 parser.setApplicationVersion(QLatin1String("0.1"));
252
253 QApplicationArgument param(QLatin1String("param"),
254 QXmlPatternistCLI::tr("Binds an external variable. The value is directly available using the variable reference: $name."),
255 qMetaTypeId<Parameter>());
256 param.setMaximumOccurrence(-1);
257 parser.addArgument(param);
258
259 const QApplicationArgument noformat(QLatin1String("no-format"),
260 QXmlPatternistCLI::tr("By default output is formatted for readability. When specified, strict serialization is performed."));
261 parser.addArgument(noformat);
262
263 const QApplicationArgument isURI(QLatin1String("is-uri"),
264 QXmlPatternistCLI::tr("If specified, all filenames on the command line are interpreted as URIs instead of a local filenames."));
265 parser.addArgument(isURI);
266
267 const QApplicationArgument initialTemplateName(QLatin1String("initial-template"),
268 QXmlPatternistCLI::tr("The name of the initial template to call as a Clark Name."),
269 QVariant::String);
270 parser.addArgument(initialTemplateName);
271
272 /* The temporary object is required to compile with g++ 3.3. */
273 QApplicationArgument queryURI = QApplicationArgument(QLatin1String("query/stylesheet"),
274 QXmlPatternistCLI::tr("A local filename pointing to the query to run. If the name ends with .xsl it's assumed "
275 "to be an XSL-T stylesheet. If it ends with .xq, it's assumed to be an XQuery query. (In "
276 "other cases it's also assumed to be an XQuery query, but that interpretation may "
277 "change in a future release of Qt.)"),
278 QVariant::String);
279 queryURI.setMinimumOccurrence(1);
280 queryURI.setNameless(true);
281 parser.addArgument(queryURI);
282
283 QApplicationArgument focus = QApplicationArgument(QLatin1String("focus"),
284 QXmlPatternistCLI::tr("The document to use as focus. Mandatory "
285 "in case a stylesheet is used. This option is "
286 "also affected by the is-uris option."),
287 QVariant::String);
288 focus.setMinimumOccurrence(0);
289 focus.setNameless(true);
290 parser.addArgument(focus);
291
292 QApplicationArgument output(QLatin1String("output"),
293 QXmlPatternistCLI::tr("A local file to which the output should be written. "
294 "The file is overwritten, or if not exist, created. "
295 "If absent, stdout is used."),
296 qMetaTypeId<QIODevice *>());
297 parser.addArgument(output);
298
299 if(!parser.parse())
300 return parser.exitCode();
301
302 /* Get the query URI. */
303 const QUrl effectiveURI(finalizeURI(parser, isURI, queryURI));
304
305 QXmlQuery::QueryLanguage lang;
306
307 if(effectiveURI.toString().endsWith(QLatin1String(".xsl")))
308 lang = QXmlQuery::XSLT20;
309 else
310 lang = QXmlQuery::XQuery10;
311
312 if(lang == QXmlQuery::XQuery10 && parser.has(initialTemplateName))
313 {
314 parser.message(QXmlPatternistCLI::tr("An initial template name cannot be specified when running an XQuery."));
315 return QApplicationArgumentParser::ParseError;
316 }
317
318 QXmlQuery query(lang, namePool);
319
320 query.setInitialTemplateName(qVariantValue<QXmlName>(parser.value(initialTemplateName)));
321
322 /* Bind external variables. */
323 {
324 const QVariantList parameters(parser.values(param));
325 const int len = parameters.count();
326
327 /* For tracking duplicates. */
328 QSet<QString> usedParameters;
329
330 for(int i = 0; i < len; ++i)
331 {
332 const Parameter p(qVariantValue<Parameter>(parameters.at(i)));
333
334 if(usedParameters.contains(p.first))
335 {
336 parser.message(QXmlPatternistCLI::tr("Each parameter must be unique, %1 is specified at least twice.").arg(p.first));
337 return QApplicationArgumentParser::ParseError;
338 }
339 else
340 {
341 usedParameters.insert(p.first);
342 query.bindVariable(p.first, QXmlItem(p.second));
343 }
344 }
345 }
346
347 if(parser.has(focus))
348 {
349 if(!query.setFocus(finalizeURI(parser, isURI, focus)))
350 return QueryFailure;
351 }
352 else if(lang == QXmlQuery::XSLT20 && !parser.has(initialTemplateName))
353 {
354 parser.message(QXmlPatternistCLI::tr("When a stylesheet is used, a "
355 "document must be specified as a focus, or an "
356 "initial template name must be specified, or both."));
357 return QApplicationArgumentParser::ParseError;
358 }
359
360 query.setQuery(effectiveURI);
361
362 const QPatternist::AutoPtr<QIODevice> outDevice(qVariantValue<QIODevice *>(parser.value(output)));
363 Q_ASSERT(outDevice);
364 Q_ASSERT(outDevice->isWritable());
365
366 if(query.isValid())
367 {
368 typedef QPatternist::AutoPtr<QAbstractXmlReceiver> RecPtr;
369 RecPtr receiver;
370
371 if(parser.has(noformat))
372 receiver = RecPtr(new QXmlSerializer(query, outDevice.data()));
373 else
374 receiver = RecPtr(new QXmlFormatter(query, outDevice.data()));
375
376 const bool success = query.evaluateTo(receiver.data());
377
378 if(success)
379 return parser.exitCode();
380 else
381 return QueryFailure;
382 }
383 else
384 return QueryFailure;
385}
386
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