summaryrefslogtreecommitdiff
path: root/src/xmlpatterns/data/qcomparisonfactory.cpp
blob: e587a9c025236d2a54776cbc2a656db0e2c93708 (plain)
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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
/****************************************************************************
**
** Copyright (C) 2013 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 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, 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.
**
** 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qatomiccomparators_p.h"
#include "qatomicstring_p.h"
#include "qcomparisonplatform_p.h"
#include "qvaluefactory_p.h"

#include "qcomparisonfactory_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

/**
 * @short Helper class for ComparisonFactory::fromLexical() which exposes
 * CastingPlatform appropriately.
 *
 * @relates ComparisonFactory
 */
class PerformComparison : public ComparisonPlatform<PerformComparison, true>
                        , public SourceLocationReflection
{
public:
    PerformComparison(const SourceLocationReflection *const sourceLocationReflection,
                      const AtomicComparator::Operator op) : m_sourceReflection(sourceLocationReflection)
                                                           , m_operator(op)
    {
        Q_ASSERT(m_sourceReflection);
    }

    bool operator()(const AtomicValue::Ptr &operand1,
                    const AtomicValue::Ptr &operand2,
                    const SchemaType::Ptr &type,
                    const ReportContext::Ptr &context)
    {
        const ItemType::Ptr asItemType((AtomicType::Ptr(type)));

        /* One area where the Query Transform world differs from the Schema
         * world is that @c xs:duration is not considedered comparable, because
         * it's according to Schema is partially comparable. This means
         * ComparisonPlatform::fetchComparator() flags it as impossible, and
         * hence we need to override that.
         *
         * SchemaType::wxsTypeMatches() will return true for sub-types of @c
         * xs:duration as well, but that's ok since AbstractDurationComparator
         * works for them too. */
        if(BuiltinTypes::xsDuration->wxsTypeMatches(type))
            prepareComparison(AtomicComparator::Ptr(new AbstractDurationComparator()));
        else if (BuiltinTypes::xsGYear->wxsTypeMatches(type) ||
                 BuiltinTypes::xsGYearMonth->wxsTypeMatches(type) ||
                 BuiltinTypes::xsGMonth->wxsTypeMatches(type) ||
                 BuiltinTypes::xsGMonthDay->wxsTypeMatches(type) ||
                 BuiltinTypes::xsGDay->wxsTypeMatches(type))
            prepareComparison(AtomicComparator::Ptr(new AbstractDateTimeComparator()));
        else
            prepareComparison(fetchComparator(asItemType, asItemType, context));

        return flexibleCompare(operand1, operand2, context);
    }

    const SourceLocationReflection *actualReflection() const
    {
        return m_sourceReflection;
    }

    AtomicComparator::Operator operatorID() const
    {
        return m_operator;
    }

private:
    const SourceLocationReflection *const m_sourceReflection;
    const AtomicComparator::Operator      m_operator;
};

bool ComparisonFactory::compare(const AtomicValue::Ptr &operand1,
                                const AtomicComparator::Operator op,
                                const AtomicValue::Ptr &operand2,
                                const SchemaType::Ptr &type,
                                const ReportContext::Ptr &context,
                                const SourceLocationReflection *const sourceLocationReflection)
{
    Q_ASSERT(operand1);
    Q_ASSERT(operand2);
    Q_ASSERT(context);
    Q_ASSERT(sourceLocationReflection);
    Q_ASSERT(type);
    Q_ASSERT_X(type->category() == SchemaType::SimpleTypeAtomic, Q_FUNC_INFO,
               "We can only compare atomic values.");

    return PerformComparison(sourceLocationReflection, op)(operand1, operand2, type, context);
}

bool ComparisonFactory::constructAndCompare(const DerivedString<TypeString>::Ptr &operand1,
                                            const AtomicComparator::Operator op,
                                            const DerivedString<TypeString>::Ptr &operand2,
                                            const SchemaType::Ptr &type,
                                            const ReportContext::Ptr &context,
                                            const SourceLocationReflection *const sourceLocationReflection)
{
    Q_ASSERT(operand1);
    Q_ASSERT(operand2);
    Q_ASSERT(context);
    Q_ASSERT(sourceLocationReflection);
    Q_ASSERT(type);
    Q_ASSERT_X(type->category() == SchemaType::SimpleTypeAtomic, Q_FUNC_INFO,
               "We can only compare atomic values.");

    const AtomicValue::Ptr value1 = ValueFactory::fromLexical(operand1->stringValue(), type, context, sourceLocationReflection);
    const AtomicValue::Ptr value2 = ValueFactory::fromLexical(operand2->stringValue(), type, context, sourceLocationReflection);

    return compare(value1, op, value2, type, context, sourceLocationReflection);
}

QT_END_NAMESPACE