/*

 * 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 IDBAny_h

#define IDBAny_h

#if ENABLE(INDEXED_DATABASE)

#include <wtf/PassRefPtr.h>

#include <wtf/RefCounted.h>

#include <wtf/RefPtr.h>

namespace WebCore {

class IDBDatabaseRequest;

class IDBIndexRequest;

class IDBKey;

class IDBObjectStoreRequest;

class IndexedDatabaseRequest;

class SerializedScriptValue;

class IDBAny : public RefCounted<IDBAny> {

public:

    static PassRefPtr<IDBAny> create();

    template<typename T>

    static PassRefPtr<IDBAny> create(T* idbObject)

    {

        RefPtr<IDBAny> any = IDBAny::create();

        any->set(idbObject);

        return any.release();

    }

    ~IDBAny();

    enum Type {

        UndefinedType = 0,

        NullType,

        IDBDatabaseRequestType,

        IDBIndexRequestType,

        IDBKeyType,

        IDBObjectStoreRequestType,

        IndexedDatabaseRequestType,

        SerializedScriptValueType

    };

    Type type() const { return m_type; }

    // Use type() to figure out which one of these you're allowed to call.

    PassRefPtr<IDBDatabaseRequest> idbDatabaseRequest();

    PassRefPtr<IDBIndexRequest> idbIndexRequest();

    PassRefPtr<IDBKey> idbKey();

    PassRefPtr<IDBObjectStoreRequest> idbObjectStoreRequest();

    PassRefPtr<IndexedDatabaseRequest> indexedDatabaseRequest();

    PassRefPtr<SerializedScriptValue> serializedScriptValue();

    // Set can only be called once.

    void set(); // For "null".

    void set(PassRefPtr<IDBDatabaseRequest>);

    void set(PassRefPtr<IDBIndexRequest>);

    void set(PassRefPtr<IDBKey>);

    void set(PassRefPtr<IDBObjectStoreRequest>);

    void set(PassRefPtr<IndexedDatabaseRequest>);

    void set(PassRefPtr<SerializedScriptValue>);

private:

    IDBAny();

    Type m_type;

    // Only one of the following should ever be in use at any given time.

    RefPtr<IDBDatabaseRequest> m_idbDatabaseRequest;

    RefPtr<IDBIndexRequest> m_idbIndexRequest;

    RefPtr<IDBKey> m_idbKey;

    RefPtr<IDBObjectStoreRequest> m_idbObjectStoreRequest;

    RefPtr<IndexedDatabaseRequest> m_indexedDatabaseRequest;

    RefPtr<SerializedScriptValue> m_serializedScriptValue;

};

} // namespace WebCore

#endif // ENABLE(INDEXED_DATABASE)

#endif // IDBAny_h