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diff --git a/src/partition/jsondbcollator.h b/src/partition/jsondbcollator.h
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtAddOn.JsonDb 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.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef JSONDBCOLLATOR_H
+#define JSONDBCOLLATOR_H
+
+#ifndef NO_COLLATION_SUPPORT
+
+#include <QString>
+#include <QLocale>
+
+#include "jsondbpartitionglobal.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE_JSONDB_PARTITION
+
+class JsonDbCollatorPrivate;
+
+class Q_JSONDB_PARTITION_EXPORT JsonDbCollator
+{
+public:
+    enum Strength {
+        PrimaryStrength = 1,
+        BaseLetterStrength = PrimaryStrength,
+
+        SecondaryStrength = 2,
+        AccentsStrength = SecondaryStrength,
+
+        TertiaryStrength = 3,
+        CaseStrength = TertiaryStrength,
+
+        QuaternaryStrength = 4,
+        PunctuationStrength = QuaternaryStrength,
+
+        IdenticalStrength = 5,
+        CodepointStrength = IdenticalStrength
+    };
+
+    enum Option {
+        PreferUpperCase        = 0x01,
+        PreferLowerCase        = 0x02,
+        FrenchCollation        = 0x04,
+        DisableNormalization   = 0x08,
+        IgnorePunctuation      = 0x10,
+        ExtraCaseLevel         = 0x20,
+        HiraganaQuaternaryMode = 0x40,
+        NumericMode            = 0x80
+    };
+    Q_DECLARE_FLAGS(Options, Option)
+
+    enum Collation {
+        Default,
+        Big5Han,
+        Dictionary,
+        Direct,
+        GB2312Han,
+        PhoneBook,
+        Pinyin,
+        Phonetic,
+        Reformed,
+        Standard,
+        Stroke,
+        Traditional,
+        UniHan
+    };
+
+    JsonDbCollator(const QLocale &locale = QLocale(), JsonDbCollator::Collation collation = JsonDbCollator::Default);
+    JsonDbCollator(const JsonDbCollator &);
+    ~JsonDbCollator();
+    JsonDbCollator &operator=(const JsonDbCollator &);
+
+    void setLocale(const QLocale &locale);
+    QLocale locale() const;
+
+    void setCollation(Collation collation);
+    Collation collation() const;
+
+    void setStrength(Strength);
+    Strength strength() const;
+
+    void setOptions(Options);
+    Options options() const;
+
+    enum CasePreference {
+        IgnoreCase = 0x0,
+        UpperCase  = 0x1,
+        LowerCase  = 0x2
+    };
+
+    bool isCaseSensitive() const
+    { return options() & (PreferUpperCase | PreferLowerCase); }
+    CasePreference casePreference() const
+    {
+        int value = options() & 0x3;
+        if (value == 3)
+            return UpperCase;
+        return CasePreference(value);
+    }
+    void setCasePreference(CasePreference c)
+    {
+        Options o = options() & ~(PreferUpperCase | PreferLowerCase);
+        if (c == UpperCase)
+            o |= PreferUpperCase;
+        else if (c == LowerCase)
+            o |= PreferLowerCase;
+        setOptions(o);
+    }
+
+    void setNumericMode(bool on)
+    { setOptions(on ? options() | NumericMode : options() & ~NumericMode); }
+    bool numericMode() const
+    { return options() & NumericMode; }
+
+    int compare(const QString &s1, const QString &s2) const;
+    int compare(const QStringRef &s1, const QStringRef &s2) const;
+    bool operator()(const QString &s1, const QString &s2) const
+    { return compare(s1, s2) < 0; }
+
+    QByteArray sortKey(const QString &string) const;
+
+private:
+    JsonDbCollatorPrivate *d;
+
+    void detach();
+    void init();
+};
+
+QT_END_NAMESPACE_JSONDB_PARTITION
+
+QT_END_HEADER
+
+#endif // NO_COLLATION_SUPPORT
+
+#endif // JSONDBCOLLATOR_H