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
|
/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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
|
