/*

 * Copyright (C) 2010 Google Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef IDBKey_h

#define IDBKey_h

#include "PlatformString.h"

#include <wtf/Forward.h>

#if ENABLE(INDEXED_DATABASE)

namespace WebCore {

// FIXME: Add dates.

class IDBKey : public RefCounted<IDBKey> {

public:

    static PassRefPtr<IDBKey> create()

    {

        return adoptRef(new IDBKey());

    }

    static PassRefPtr<IDBKey> create(int32_t number)

    {

        return adoptRef(new IDBKey(number));

    }

    static PassRefPtr<IDBKey> create(const String& string)

    {

        return adoptRef(new IDBKey(string));

    }

    ~IDBKey();

    // In order of the least to the highest precedent in terms of sort order.

    enum Type {

        NullType = 0,

        StringType,

        NumberType

    };

    Type type() const { return m_type; }

    const String& string() const

    {

        ASSERT(m_type == StringType);

        return m_string;

    }

    int32_t number() const

    {

        ASSERT(m_type == NumberType);

        return m_number;

    }

private:

    IDBKey();

    explicit IDBKey(int32_t);

    explicit IDBKey(const String&);

    Type m_type;

    String m_string;

    int32_t m_number;

};

}

#endif // ENABLE(INDEXED_DATABASE)

#endif // IDBKey_h