/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
** All rights reserved. | |
** Contact: Nokia Corporation (qt-info@nokia.com) | |
** | |
** This file is part of the QtXmlPatterns module of the Qt Toolkit. | |
** | |
** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
** This file may be used under the terms of the GNU Lesser General Public | |
** License version 2.1 as published by the Free Software Foundation and | |
** appearing in the file LICENSE.LGPL included in the packaging of this | |
** file. Please review the following information to ensure the GNU Lesser | |
** General Public License version 2.1 requirements will be met: | |
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. | |
** | |
** In addition, as a special exception, Nokia gives you certain additional | |
** rights. These rights are described in the Nokia Qt LGPL Exception | |
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. | |
** | |
** GNU General Public License Usage | |
** Alternatively, this file may be used under the terms of the GNU General | |
** Public License version 3.0 as published by the Free Software Foundation | |
** and appearing in the file LICENSE.GPL included in the packaging of this | |
** file. Please review the following information to ensure the GNU General | |
** Public License version 3.0 requirements will be met: | |
** http://www.gnu.org/copyleft/gpl.html. | |
** | |
** Other Usage | |
** Alternatively, this file may be used in accordance with the terms and | |
** conditions contained in a signed written agreement between you and Nokia. | |
** | |
** | |
** | |
** | |
** | |
** $QT_END_LICENSE$ | |
** | |
****************************************************************************/ | |
#include "qcommonsequencetypes_p.h" | |
#include "qcommonvalues_p.h" | |
#include "qitemmappingiterator_p.h" | |
#include "qpatternistlocale_p.h" | |
#include "qtracefn_p.h" | |
QT_BEGIN_NAMESPACE | |
using namespace QPatternist; | |
namespace QPatternist | |
{ | |
/** | |
* @short TraceCallback is a MappingCallback and takes care of | |
* the tracing of each individual item. | |
* | |
* Because Patternist must be thread safe, TraceFN creates a TraceCallback | |
* each time the function is evaluated. In other words, TraceFN, which is | |
* an Expression sub class, can't modify its members, but MappingCallback | |
* does not have this limitation since it's created on a per evaluation basis. | |
* | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
class TraceCallback : public QSharedData | |
{ | |
public: | |
typedef QExplicitlySharedDataPointer<TraceCallback> Ptr; | |
inline TraceCallback(const QString &msg) : m_position(0), | |
m_msg(msg) | |
{ | |
} | |
/** | |
* Performs the actual tracing. | |
*/ | |
Item mapToItem(const Item &item, | |
const DynamicContext::Ptr &context) | |
{ | |
QTextStream out(stderr); | |
++m_position; | |
if(m_position == 1) | |
{ | |
if(item) | |
{ | |
out << qPrintable(m_msg) | |
<< " : " | |
<< qPrintable(item.stringValue()); | |
} | |
else | |
{ | |
out << qPrintable(m_msg) | |
<< " : (" | |
<< qPrintable(formatType(context->namePool(), CommonSequenceTypes::Empty)) | |
<< ")\n"; | |
return Item(); | |
} | |
} | |
else | |
{ | |
out << qPrintable(item.stringValue()) | |
<< '[' | |
<< m_position | |
<< "]\n"; | |
} | |
return item; | |
} | |
private: | |
xsInteger m_position; | |
const QString m_msg; | |
}; | |
} | |
Item::Iterator::Ptr TraceFN::evaluateSequence(const DynamicContext::Ptr &context) const | |
{ | |
const QString msg(m_operands.last()->evaluateSingleton(context).stringValue()); | |
return makeItemMappingIterator<Item>(TraceCallback::Ptr(new TraceCallback(msg)), | |
m_operands.first()->evaluateSequence(context), | |
context); | |
} | |
Item TraceFN::evaluateSingleton(const DynamicContext::Ptr &context) const | |
{ | |
const QString msg(m_operands.last()->evaluateSingleton(context).stringValue()); | |
const Item item(m_operands.first()->evaluateSingleton(context)); | |
return TraceCallback::Ptr(new TraceCallback(msg))->mapToItem(item, context); | |
} | |
SequenceType::Ptr TraceFN::staticType() const | |
{ | |
return m_operands.first()->staticType(); | |
} | |
QT_END_NAMESPACE |