source: trunk/src/xmlpatterns/api/qxmlquery_p.h@ 1168

Last change on this file since 1168 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 12.7 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the QtXmlPatterns module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this 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 have questions regarding the use of this file, please contact
37** Nokia at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42//
43// W A R N I N G
44// -------------
45//
46// This file is not part of the Qt API. It exists purely as an
47// implementation detail. This header file may change from version to
48// version without notice, or even be removed.
49//
50// We mean it.
51
52#ifndef QXMLQUERY_P_H
53#define QXMLQUERY_P_H
54
55#include <QAbstractMessageHandler>
56#include <QAbstractUriResolver>
57#include <QPointer>
58#include <QSourceLocation>
59#include <QUrl>
60#include <QVariant>
61#include <QXmlName>
62#include <QXmlNamePool>
63#include <QXmlQuery>
64
65#include "qacceltreebuilder_p.h"
66#include "qacceltreeresourceloader_p.h"
67#include "qcoloringmessagehandler_p.h"
68#include "qcommonsequencetypes_p.h"
69#include "qexpressionfactory_p.h"
70#include "qfocus_p.h"
71#include "qfunctionfactorycollection_p.h"
72#include "qgenericdynamiccontext_p.h"
73#include "qgenericstaticcontext_p.h"
74#include "qnamepool_p.h"
75#include "qnetworkaccessdelegator_p.h"
76#include "qreferencecountedvalue_p.h"
77#include "qresourcedelegator_p.h"
78#include "qstaticfocuscontext_p.h"
79#include "quriloader_p.h"
80#include "qvariableloader_p.h"
81
82QT_BEGIN_NAMESPACE
83
84class QXmlQueryPrivate
85{
86public:
87
88 inline QXmlQueryPrivate(const QXmlNamePool &np = QXmlNamePool()) : namePool(np)
89 , messageHandler(0)
90 , uriResolver(0)
91 , queryLanguage(QXmlQuery::XQuery10)
92 , m_networkAccessDelegator(new QPatternist::NetworkAccessDelegator(0, 0))
93 {
94 m_networkAccessDelegator->m_variableURIManager = new QPatternist::URILoader(ownerObject(), namePool.d, variableLoader());
95 }
96
97 void detach()
98 {
99 if(m_variableLoader)
100 m_variableLoader = QPatternist::VariableLoader::Ptr(new QPatternist::VariableLoader(namePool.d, m_variableLoader));
101
102 delete m_networkAccessDelegator->m_variableURIManager;
103 m_networkAccessDelegator->m_variableURIManager = new QPatternist::URILoader(ownerObject(), namePool.d, m_variableLoader);
104
105 if(m_resourceLoader)
106 {
107 const QPatternist::AccelTreeResourceLoader::Ptr nev(new QPatternist::AccelTreeResourceLoader(namePool.d,
108 m_networkAccessDelegator));
109 m_resourceLoader = QPatternist::ResourceLoader::Ptr(new QPatternist::ResourceDelegator(m_resourceLoader->deviceURIs(),
110 m_resourceLoader,
111 nev));
112 }
113 }
114
115 bool isValid()
116 {
117 return expression();
118 }
119
120 inline void recompileRequired()
121 {
122 m_expr.reset();
123 }
124
125 inline QPatternist::VariableLoader::Ptr variableLoader()
126 {
127 if(!m_variableLoader)
128 m_variableLoader = QPatternist::VariableLoader::Ptr(new QPatternist::VariableLoader(namePool.d));
129
130 return m_variableLoader;
131 }
132
133 inline QPatternist::GenericStaticContext::Ptr staticContext()
134 {
135 if(m_staticContext && m_expr)
136 return m_staticContext;
137 /* Else, re-create the staticContext. */
138
139 if(!messageHandler)
140 messageHandler = new QPatternist::ColoringMessageHandler(ownerObject());
141
142 if(!m_functionFactory)
143 {
144 if(queryLanguage == QXmlQuery::XSLT20)
145 m_functionFactory = QPatternist::FunctionFactoryCollection::xslt20Factory(namePool.d);
146 else
147 m_functionFactory = QPatternist::FunctionFactoryCollection::xpath20Factory(namePool.d);
148 }
149
150 const QPatternist::GenericStaticContext::Ptr genericStaticContext(new QPatternist::GenericStaticContext(namePool.d,
151 messageHandler,
152 queryURI,
153 m_functionFactory,
154 queryLanguage));
155 genericStaticContext->setResourceLoader(resourceLoader());
156
157 genericStaticContext->setExternalVariableLoader(variableLoader());
158
159 m_staticContext = genericStaticContext;
160
161 if(!contextItem.isNull())
162 m_staticContext = QPatternist::StaticContext::Ptr(new QPatternist::StaticFocusContext(QPatternist::AtomicValue::qtToXDMType(contextItem), m_staticContext));
163 else if( queryLanguage == QXmlQuery::XmlSchema11IdentityConstraintField
164 || queryLanguage == QXmlQuery::XmlSchema11IdentityConstraintSelector
165 || queryLanguage == QXmlQuery::XPath20)
166 m_staticContext = QPatternist::StaticContext::Ptr(new QPatternist::StaticFocusContext(QPatternist::BuiltinTypes::node, m_staticContext));
167
168 for (int i = 0; i < m_additionalNamespaceBindings.count(); ++i) {
169 m_staticContext->namespaceBindings()->addBinding(m_additionalNamespaceBindings.at(i));
170 }
171
172 return m_staticContext;
173 }
174
175 inline QPatternist::DynamicContext::Ptr dynamicContext(QAbstractXmlReceiver *const callback = 0)
176 {
177 const QPatternist::StaticContext::Ptr statContext(staticContext());
178 Q_ASSERT(statContext);
179
180 QPatternist::GenericDynamicContext::Ptr dynContext(new QPatternist::GenericDynamicContext(namePool.d, statContext->messageHandler(),
181 statContext->sourceLocations()));
182
183 QPatternist::AutoPtr<QPatternist::NodeBuilder> nodeBuilder(new QPatternist::AccelTreeBuilder<false>(QUrl(), QUrl(), namePool.d,
184 dynContext.data()));
185 dynContext->setNodeBuilder(nodeBuilder);
186
187 dynContext->setResourceLoader(statContext->resourceLoader());
188 dynContext->setExternalVariableLoader(statContext->externalVariableLoader());
189 dynContext->setUriResolver(uriResolver);
190
191 if(callback)
192 dynContext->setOutputReceiver(callback);
193
194 if(contextItem.isNull())
195 return dynContext;
196 else
197 {
198 QPatternist::DynamicContext::Ptr focus(new QPatternist::Focus(dynContext));
199 QPatternist::Item::Iterator::Ptr it(QPatternist::makeSingletonIterator(QPatternist::Item::fromPublic(contextItem)));
200 it->next();
201 focus->setFocusIterator(it);
202 return focus;
203 }
204 }
205
206 inline QPatternist::AccelTreeResourceLoader::Ptr resourceLoader()
207 {
208 if(!m_resourceLoader)
209 m_resourceLoader = (new QPatternist::AccelTreeResourceLoader(namePool.d, m_networkAccessDelegator));
210
211 return m_resourceLoader;
212 }
213
214 void setRequiredType(const QPatternist::SequenceType::Ptr &seqType)
215 {
216 Q_ASSERT(seqType);
217 if(!m_requiredType || m_requiredType->is(seqType))
218 return;
219
220 m_requiredType = seqType;
221 m_staticContext.reset();
222 }
223
224 QPatternist::SequenceType::Ptr requiredType()
225 {
226 if(m_requiredType)
227 return m_requiredType;
228 else
229 {
230 m_requiredType = QPatternist::CommonSequenceTypes::ZeroOrMoreItems;
231 return m_requiredType;
232 }
233 }
234
235 QPatternist::Expression::Ptr expression(QIODevice *const queryDevice = 0)
236 {
237 if(m_expr && !queryDevice)
238 return m_expr;
239
240 /* If we need to update, but we don't have any source code, we can
241 * never create an Expression. */
242 if(!queryDevice)
243 return QPatternist::Expression::Ptr();
244
245 try
246 {
247 /* The static context has source locations, and they need to be
248 * updated to the new query. */
249 m_staticContext.reset();
250
251 if(!m_expressionFactory)
252 m_expressionFactory = QPatternist::ExpressionFactory::Ptr(new QPatternist::ExpressionFactory());
253
254 m_expr = m_expressionFactory->createExpression(queryDevice, staticContext(),
255 queryLanguage,
256 requiredType(),
257 queryURI,
258 initialTemplateName);
259 }
260 catch(const QPatternist::Exception)
261 {
262 m_expr.reset();
263
264 /* We don't call m_staticContext.reset() because it shouldn't be
265 * necessary, since m_staticContext is changed when the expression
266 * is changed. */
267 }
268
269 return m_expr;
270 }
271
272 inline void addAdditionalNamespaceBinding(const QXmlName &binding)
273 {
274 m_additionalNamespaceBindings.append(binding);
275 }
276
277 QXmlNamePool namePool;
278 QPointer<QAbstractMessageHandler> messageHandler;
279 /**
280 * Must be absolute and valid.
281 */
282 QUrl queryURI;
283 const QAbstractUriResolver * uriResolver;
284 QXmlItem contextItem;
285 QXmlName initialTemplateName;
286
287 inline void setExpressionFactory(const QPatternist::ExpressionFactory::Ptr &expr)
288 {
289 m_expressionFactory = expr;
290 }
291
292 QXmlQuery::QueryLanguage queryLanguage;
293 QPointer<QNetworkAccessManager> userNetworkManager;
294
295 inline QObject *ownerObject()
296 {
297 if(!m_owner)
298 m_owner = new QPatternist::ReferenceCountedValue<QObject>(new QObject());
299
300 return m_owner->value;
301 }
302
303 QPatternist::ExpressionFactory::Ptr m_expressionFactory;
304 QPatternist::StaticContext::Ptr m_staticContext;
305 QPatternist::VariableLoader::Ptr m_variableLoader;
306 QPatternist::DeviceResourceLoader::Ptr m_resourceLoader;
307 /**
308 * This is the AST for the query.
309 */
310 QPatternist::Expression::Ptr m_expr;
311 QPatternist::ReferenceCountedValue<QObject>::Ptr m_owner;
312
313 /**
314 * This is our effective network manager, that we end up using. The one the
315 * user sets is userNetworkManager.
316 */
317 QPatternist::SequenceType::Ptr m_requiredType;
318 QPatternist::FunctionFactory::Ptr m_functionFactory;
319 QPatternist::NetworkAccessDelegator::Ptr m_networkAccessDelegator;
320
321 QList<QXmlName> m_additionalNamespaceBindings;
322};
323
324QT_END_NAMESPACE
325
326QT_END_HEADER
327
328#endif
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