/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef MOZSTORAGESTATEMENTJSHELPER_H

#define MOZSTORAGESTATEMENTJSHELPER_H

#include "nsIXPCScriptable.h"

#include "nsIXPConnect.h"

class Statement;

namespace mozilla {

namespace storage {

class StatementParams;

class StatementRow;

class StatementJSHelper : public nsIXPCScriptable

{

public:

  NS_DECL_ISUPPORTS

  NS_DECL_NSIXPCSCRIPTABLE

private:

  nsresult getRow(Statement *, JSContext *, JSObject *, JS::Value *);

  nsresult getParams(Statement *, JSContext *, JSObject *, JS::Value *);

};

/**

 * Wrappers used to clean up the references JS helpers hold to the statement.

 * For cycle-avoidance reasons they do not hold reference-counted references,

 * so it is important we do this.

 */

class StatementParamsHolder final: public nsISupports {

public:

  NS_DECL_ISUPPORTS

  explicit StatementParamsHolder(StatementParams* aParams)

    : mParams(aParams)

  {

  }

  StatementParams* Get() const {

    MOZ_ASSERT(mParams);

    return mParams;

  }

private:

  virtual ~StatementParamsHolder();

  RefPtr<StatementParams> mParams;

};

class StatementRowHolder final: public nsISupports {

public:

  NS_DECL_ISUPPORTS

  explicit StatementRowHolder(StatementRow* aRow)

    : mRow(aRow)

  {

  }

  StatementRow* Get() const {

    MOZ_ASSERT(mRow);

    return mRow;

  }

private:

  virtual ~StatementRowHolder();

  RefPtr<StatementRow> mRow;

};

} // namespace storage

} // namespace mozilla

#endif // MOZSTORAGESTATEMENTJSHELPER_H