storage/mozStorageBindingParamsArray.cpp

   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 #include "mozStorageBindingParamsArray.h"
   8 #include "mozStorageBindingParams.h"
   9 #include "StorageBaseStatementInternal.h"
  10
  11 namespace mozilla {
  12 namespace storage {
  13
  14 ////////////////////////////////////////////////////////////////////////////////
  15 //// BindingParamsArray
  16
  17 BindingParamsArray::BindingParamsArray(
  18   StorageBaseStatementInternal *aOwningStatement
  19 )
  20 : mOwningStatement(aOwningStatement)
  21 , mLocked(false)
  22 {
  23 }
  24
  25 void
  26 BindingParamsArray::lock()
  27 {
  28   NS_ASSERTION(mLocked == false, "Array has already been locked!");
  29   mLocked = true;
  30
  31   // We also no longer need to hold a reference to our statement since it owns
  32   // us.
  33   mOwningStatement = nullptr;
  34 }
  35
  36 const StorageBaseStatementInternal *
  37 BindingParamsArray::getOwner() const
  38 {
  39   return mOwningStatement;
  40 }
  41
  42 NS_IMPL_ISUPPORTS(
  43   BindingParamsArray,
  44   mozIStorageBindingParamsArray
  45 )
  46
  47 ///////////////////////////////////////////////////////////////////////////////
  48 //// mozIStorageBindingParamsArray
  49
  50 NS_IMETHODIMP
  51 BindingParamsArray::NewBindingParams(mozIStorageBindingParams **_params)
  52 {
  53   NS_ENSURE_FALSE(mLocked, NS_ERROR_UNEXPECTED);
  54
  55   nsCOMPtr<mozIStorageBindingParams> params(
  56     mOwningStatement->newBindingParams(this));
  57   NS_ENSURE_TRUE(params, NS_ERROR_UNEXPECTED);
  58
  59   params.forget(_params);
  60   return NS_OK;
  61 }
  62
  63 NS_IMETHODIMP
  64 BindingParamsArray::AddParams(mozIStorageBindingParams *aParameters)
  65 {
  66   NS_ENSURE_FALSE(mLocked, NS_ERROR_UNEXPECTED);
  67
  68   BindingParams *params = static_cast<BindingParams *>(aParameters);
  69
  70   // Check to make sure that this set of parameters was created with us.
  71   if (params->getOwner() != this)
  72     return NS_ERROR_UNEXPECTED;
  73
  74   NS_ENSURE_TRUE(mArray.AppendElement(params), NS_ERROR_OUT_OF_MEMORY);
  75
  76   // Lock the parameters only after we've successfully added them.
  77   params->lock();
  78
  79   return NS_OK;
  80 }
  81
  82 NS_IMETHODIMP
  83 BindingParamsArray::GetLength(uint32_t *_length)
  84 {
  85   *_length = length();
  86   return NS_OK;
  87 }
  88
  89 } // namespace storage
  90 } // namespace mozilla