gecko-dev/storage/mozStorageStatementJSHelper.h

82 lines
1.7 KiB
C++

/* -*- 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