storage/mozStorageStatementJSHelper.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef MOZSTORAGESTATEMENTJSHELPER_H
   8 #define MOZSTORAGESTATEMENTJSHELPER_H
   9
  10 #include "nsIXPCScriptable.h"
  11 #include "nsIXPConnect.h"
  12
  13 class Statement;
  14
  15 namespace mozilla {
  16 namespace storage {
  17
  18 class StatementJSHelper : public nsIXPCScriptable
  19 {
  20 public:
  21   NS_DECL_ISUPPORTS
  22   NS_DECL_NSIXPCSCRIPTABLE
  23
  24 private:
  25   nsresult getRow(Statement *, JSContext *, JSObject *, JS::Value *);
  26   nsresult getParams(Statement *, JSContext *, JSObject *, JS::Value *);
  27 };
  28
  29 /**
  30  * Wrappers used to clean up the references JS helpers hold to the statement.
  31  * For cycle-avoidance reasons they do not hold reference-counted references,
  32  * so it is important we do this.
  33  */
  34 class StatementJSObjectHolder : public nsIXPConnectJSObjectHolder
  35 {
  36 public:
  37   NS_DECL_ISUPPORTS
  38   NS_DECL_NSIXPCONNECTJSOBJECTHOLDER
  39
  40   explicit StatementJSObjectHolder(nsIXPConnectJSObjectHolder* aHolder);
  41
  42 protected:
  43   virtual ~StatementJSObjectHolder() {};
  44   nsCOMPtr<nsIXPConnectJSObjectHolder> mHolder;
  45 };
  46
  47 class StatementParamsHolder final: public StatementJSObjectHolder {
  48 public:
  49   explicit StatementParamsHolder(nsIXPConnectJSObjectHolder* aHolder)
  50     : StatementJSObjectHolder(aHolder) {
  51   }
  52
  53 private:
  54   virtual ~StatementParamsHolder();
  55 };
  56
  57 class StatementRowHolder final: public StatementJSObjectHolder {
  58 public:
  59   explicit StatementRowHolder(nsIXPConnectJSObjectHolder* aHolder)
  60     : StatementJSObjectHolder(aHolder) {
  61   }
  62
  63 private:
  64   virtual ~StatementRowHolder();
  65 };
  66
  67 } // namespace storage
  68 } // namespace mozilla
  69
  70 #endif // MOZSTORAGESTATEMENTJSHELPER_H