C++ (Cpp) IDBTransaction::NextObjectStoreId Examples

Example #1

File: IDBDatabase.cpp Project: 70599/Waterfox

already_AddRefed<IDBObjectStore>
IDBDatabase::CreateObjectStore(
                            const nsAString& aName,
                            const IDBObjectStoreParameters& aOptionalParameters,
                            ErrorResult& aRv)
{
  AssertIsOnOwningThread();

  IDBTransaction* transaction = IDBTransaction::GetCurrent();
  if (!transaction ||
      transaction->Database() != this ||
      transaction->GetMode() != IDBTransaction::VERSION_CHANGE) {
    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR);
    return nullptr;
  }

  if (!transaction->IsOpen()) {
    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
    return nullptr;
  }

  KeyPath keyPath(0);
  if (NS_FAILED(KeyPath::Parse(aOptionalParameters.mKeyPath, &keyPath))) {
    aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
    return nullptr;
  }

  nsTArray<ObjectStoreSpec>& objectStores = mSpec->objectStores();
  for (uint32_t count = objectStores.Length(), index = 0;
       index < count;
       index++) {
    if (aName == objectStores[index].metadata().name()) {
      aRv.Throw(NS_ERROR_DOM_INDEXEDDB_CONSTRAINT_ERR);
      return nullptr;
    }
  }

  if (!keyPath.IsAllowedForObjectStore(aOptionalParameters.mAutoIncrement)) {
    aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
    return nullptr;
  }

  const ObjectStoreSpec* oldSpecElements =
    objectStores.IsEmpty() ? nullptr : objectStores.Elements();

  ObjectStoreSpec* newSpec = objectStores.AppendElement();
  newSpec->metadata() =
    ObjectStoreMetadata(transaction->NextObjectStoreId(), nsString(aName),
                        keyPath, aOptionalParameters.mAutoIncrement);

  if (oldSpecElements &&
      oldSpecElements != objectStores.Elements()) {
    MOZ_ASSERT(objectStores.Length() > 1);

    // Array got moved, update the spec pointers for all live objectStores and
    // indexes.
    RefreshSpec(/* aMayDelete */ false);
  }

  RefPtr<IDBObjectStore> objectStore =
    transaction->CreateObjectStore(*newSpec);
  MOZ_ASSERT(objectStore);

  // Don't do this in the macro because we always need to increment the serial
  // number to keep in sync with the parent.
  const uint64_t requestSerialNumber = IDBRequest::NextSerialNumber();

  IDB_LOG_MARK("IndexedDB %s: Child  Transaction[%lld] Request[%llu]: "
                 "database(%s).transaction(%s).createObjectStore(%s)",
               "IndexedDB %s: C T[%lld] R[%llu]: "
                 "IDBDatabase.createObjectStore()",
               IDB_LOG_ID_STRING(),
               transaction->LoggingSerialNumber(),
               requestSerialNumber,
               IDB_LOG_STRINGIFY(this),
               IDB_LOG_STRINGIFY(transaction),
               IDB_LOG_STRINGIFY(objectStore));

  return objectStore.forget();
}