SQLiteIDBCursor::SQLiteIDBCursor(SQLiteIDBTransaction& transaction, const IDBCursorInfo& info)
: m_transaction(&transaction)
, m_cursorIdentifier(info.identifier())
, m_objectStoreID(info.objectStoreIdentifier())
, m_indexID(info.cursorSource() == IndexedDB::CursorSource::Index ? info.sourceIdentifier() : IDBIndexMetadata::InvalidId)
, m_cursorDirection(info.cursorDirection())
, m_keyRange(info.range())
{
ASSERT(m_objectStoreID);
}
IDBError MemoryIDBBackingStore::openCursor(const IDBResourceIdentifier& transactionIdentifier, const IDBCursorInfo& info, IDBGetResult& outData)
{
LOG(IndexedDB, "MemoryIDBBackingStore::openCursor");
ASSERT(!MemoryCursor::cursorForIdentifier(info.identifier()));
if (!m_transactions.contains(transactionIdentifier))
return { IDBDatabaseException::UnknownError, ASCIILiteral("No backing store transaction found in which to open a cursor") };
switch (info.cursorSource()) {
case IndexedDB::CursorSource::ObjectStore: {
auto* objectStore = m_objectStoresByIdentifier.get(info.sourceIdentifier());
if (!objectStore)
return { IDBDatabaseException::UnknownError, ASCIILiteral("No backing store object store found") };
MemoryCursor* cursor = objectStore->maybeOpenCursor(info);
if (!cursor)
return { IDBDatabaseException::UnknownError, ASCIILiteral("Could not create object store cursor in backing store") };
cursor->currentData(outData);
break;
}
case IndexedDB::CursorSource::Index:
auto* objectStore = m_objectStoresByIdentifier.get(info.objectStoreIdentifier());
if (!objectStore)
return { IDBDatabaseException::UnknownError, ASCIILiteral("No backing store object store found") };
auto* index = objectStore->indexForIdentifier(info.sourceIdentifier());
if (!index)
return { IDBDatabaseException::UnknownError, ASCIILiteral("No backing store index found") };
MemoryCursor* cursor = index->maybeOpenCursor(info);
if (!cursor)
return { IDBDatabaseException::UnknownError, ASCIILiteral("Could not create index cursor in backing store") };
cursor->currentData(outData);
break;
}
return { };
}
