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+/****************************************************************************
+**
+** 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 Qt Assistant 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QHELPCOLLECTIONHANDLER_H
+#define QHELPCOLLECTIONHANDLER_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists for the convenience
+// of the help generator tools. This header file may change from version
+// to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/QList>
+#include <QtCore/QString>
+#include <QtCore/QObject>
+#include <QtCore/QVariant>
+#include <QtCore/QStringList>
+
+#include <QtSql/QSqlQuery>
+
+QT_BEGIN_NAMESPACE
+
+class QHelpCollectionHandler : public QObject
+{
+    Q_OBJECT
+
+public:
+    struct DocInfo
+    {
+        QString fileName;
+        QString folderName;
+        QString namespaceName;
+    };
+    typedef QList<DocInfo> DocInfoList;
+
+    explicit QHelpCollectionHandler(const QString &collectionFile,
+        QObject *parent = 0);
+    ~QHelpCollectionHandler();
+
+    QString collectionFile() const;
+
+    bool openCollectionFile();
+    bool copyCollectionFile(const QString &fileName);
+
+    QStringList customFilters() const;
+    bool removeCustomFilter(const QString &filterName);
+    bool addCustomFilter(const QString &filterName,
+        const QStringList &attributes);
+
+    DocInfoList registeredDocumentations() const;
+    bool registerDocumentation(const QString &fileName);
+    bool unregisterDocumentation(const QString &namespaceName);
+
+    bool removeCustomValue(const QString &key);
+    QVariant customValue(const QString &key, const QVariant &defaultValue) const;
+    bool setCustomValue(const QString &key, const QVariant &value);
+
+    bool addFilterAttributes(const QStringList &attributes);
+    QStringList filterAttributes() const;
+    QStringList filterAttributes(const QString &filterName) const;
+    
+    int registerNamespace(const QString &nspace, const QString &fileName);
+    bool registerVirtualFolder(const QString &folderName, int namespaceId);
+    void optimizeDatabase(const QString &fileName);
+
+signals:
+    void error(const QString &msg);
+
+private:
+    bool isDBOpened();
+    bool createTables(QSqlQuery *query);
+
+    bool m_dbOpened;
+    QString m_collectionFile;
+    QString m_connectionName;
+    mutable QSqlQuery m_query;
+};
+
+QT_END_NAMESPACE
+
+#endif  //QHELPCOLLECTIONHANDLER_H