/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbServers module of the UI Extensions for Mobile.

**

** 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.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#ifndef HBCACHE_H

#define HBCACHE_H

#include <hbglobal.h>

#include <QHash>

#include <QList>

struct HbCacheItem

{

    int offset;

    int refCount;

    QString fileName;

    HbCacheItem(int off = -1, int count = 0, const QString &fName = QString())

            : offset(off),

            refCount(count),

            fileName(fName)

    {

    }

    void incrementRefCount()

    {

        refCount++;

    }

    void decrementRefCount()

    {

        refCount--;

    }

};

class HbCache

{

public:

    HbCache();

    ~HbCache();

    void clear();

    HbCacheItem* value(const QString &key) const;

    HbCacheItem* cacheItem(const QString &key);

    bool insert(const QString &key, HbCacheItem *item);

    bool remove(const QString &key);

    bool contains(const QString &key) const;

    QList<HbCacheItem*> &lruList();

    QHash<QString, HbCacheItem*> &cacheHandle();

private:

    QHash<QString, HbCacheItem*> cache;

    QList<HbCacheItem*> unusedResources;

};

#endif /* HBCACHE_H */