summaryrefslogtreecommitdiffstats
path: root/src/xmlpatterns/expr/qqnameconstructor_p.h
blob: 95ea5b9678467f4253877b9155e6cea771bd772e (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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.

#ifndef Patternist_QNameConstructor_H
#define Patternist_QNameConstructor_H

#include "qsinglecontainer_p.h"
#include "qbuiltintypes_p.h"
#include "qpatternistlocale_p.h"
#include "qxpathhelper_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{
    /**
     * @short Creates an @c xs:QName value from a lexical QName using
     * statically known namespace bindings.
     *
     * @see QQNameValue
     * @see QXmlUtils
     * @author Frans Englich <fenglich@trolltech.com>
     * @ingroup Patternist_expressions
     */
    class QNameConstructor : public SingleContainer
    {
    public:

        QNameConstructor(const Expression::Ptr &source,
                         const NamespaceResolver::Ptr &nsResolver);

        virtual Item evaluateSingleton(const DynamicContext::Ptr &) const;

        virtual SequenceType::List expectedOperandTypes() const;

        virtual SequenceType::Ptr staticType() const;

        virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;

        /**
         * Expands @p lexicalQName, which is a lexical representation of a QName such as "x:body", into
         * a QName using @p nsResolver to supply the namespace bindings.
         *
         * If @p lexicalQName is lexically invalid @p InvalidQName is raised via @p context, or if
         * no namespace binding does not exists for a prefix(if any) in @p lexicalQName, @p NoBinding
         * is raised via @p context.
         *
         * If @p asForAttribute is @c true, the name is considered to be for an
         * attribute in some way, and @p lexicalQName will not pick up the
         * default namespace if it doesn't have a prefix.
         *
         * @p nsResolver is parameterized meaning the function can be instantiated with either
         * DynamicContext or StaticContext.
         *
         * @see QQNameValue
         * @see QXmlUtils
         */
        template<typename TReportContext,
                 const ReportContext::ErrorCode InvalidQName,
                 const ReportContext::ErrorCode NoBinding>
        static
        QXmlName expandQName(const QString &lexicalQName,
                             const TReportContext &context,
                             const NamespaceResolver::Ptr &nsResolver,
                             const SourceLocationReflection *const r,
                             const bool asForAttribute = false);

        /**
         * Resolves the namespace prefix @p prefix to its namespace if it exists, or
         * raised ReportContext::XPST0081 otherwise.
         *
         * @returns the namespace URI corresponding to @p prefix
         */
        static QXmlName::NamespaceCode namespaceForPrefix(const QXmlName::PrefixCode prefix,
                                                          const StaticContext::Ptr &context,
                                                          const SourceLocationReflection *const r);

        virtual const SourceLocationReflection *actualReflection() const;

    private:
        const NamespaceResolver::Ptr m_nsResolver;
    };

    template<typename TReportContext,
             const ReportContext::ErrorCode InvalidQName,
             const ReportContext::ErrorCode NoBinding>
    QXmlName QNameConstructor::expandQName(const QString &lexicalQName,
                                           const TReportContext &context,
                                           const NamespaceResolver::Ptr &nsResolver,
                                           const SourceLocationReflection *const r,
                                           const bool asForAttribute)
    {
        Q_ASSERT(nsResolver);
        Q_ASSERT(context);

        if(XPathHelper::isQName(lexicalQName))
        {
            QString prefix;
            QString local;
            XPathHelper::splitQName(lexicalQName, prefix, local);
            const QXmlName::NamespaceCode nsCode = asForAttribute && prefix.isEmpty() ? QXmlName::NamespaceCode(StandardNamespaces::empty)
                                                                                   : (nsResolver->lookupNamespaceURI(context->namePool()->allocatePrefix(prefix)));

            if(nsCode == NamespaceResolver::NoBinding)
            {
                context->error(QtXmlPatterns::tr("No namespace binding exists for "
                                  "the prefix %1 in %2").arg(formatKeyword(prefix),
                                                             formatKeyword(lexicalQName)),
                               NoBinding,
                               r);
                return QXmlName(); /* Silence compiler warning. */
            }
            else
                return context->namePool()->allocateQName(context->namePool()->stringForNamespace(nsCode), local, prefix);
        }
        else
        {
            context->error(QtXmlPatterns::tr("%1 is an invalid %2")
                              .arg(formatData(lexicalQName))
                              .arg(formatType(context->namePool(), BuiltinTypes::xsQName)),
                           InvalidQName,
                           r);
            return QXmlName(); /* Silence compiler warning. */
        }
    }
}

QT_END_NAMESPACE

QT_END_HEADER

#endif