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/*
* Copyright (C) 2015-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "IDBIndexIdentifier.h"
#include "IDBKeyData.h"
#include "IDBObjectStoreInfo.h"
#include "IndexKey.h"
#include "MemoryIndex.h"
#include "MemoryObjectStoreCursor.h"
#include "ThreadSafeDataBuffer.h"
#include <wtf/HashMap.h>
#include <wtf/RefCountedAndCanMakeWeakPtr.h>
namespace WebCore {
class IDBCursorInfo;
class IDBError;
class IDBGetAllResult;
class IDBKeyData;
class IDBValue;
struct IDBKeyRangeData;
namespace IndexedDB {
enum class GetAllType : bool;
enum class IndexRecordType : bool;
}
namespace IDBServer {
class MemoryBackingStoreTransaction;
typedef HashMap<IDBKeyData, ThreadSafeDataBuffer, IDBKeyDataHash, IDBKeyDataHashTraits> KeyValueMap;
class MemoryObjectStore : public RefCountedAndCanMakeWeakPtr<MemoryObjectStore> {
public:
static Ref<MemoryObjectStore> create(const IDBObjectStoreInfo&);
~MemoryObjectStore();
void transactionFinished(MemoryBackingStoreTransaction&);
void writeTransactionStarted(MemoryBackingStoreTransaction&);
void writeTransactionFinished(MemoryBackingStoreTransaction&);
MemoryBackingStoreTransaction* writeTransaction();
IDBError createIndex(MemoryBackingStoreTransaction&, const IDBIndexInfo&);
IDBError deleteIndex(MemoryBackingStoreTransaction&, IDBIndexIdentifier);
void deleteAllIndexes(MemoryBackingStoreTransaction&);
void registerIndex(Ref<MemoryIndex>&&);
bool containsRecord(const IDBKeyData&);
void deleteRecord(const IDBKeyData&);
void deleteRange(const IDBKeyRangeData&);
IDBError addRecord(MemoryBackingStoreTransaction&, const IDBKeyData&, const IDBValue&);
IDBError addRecord(MemoryBackingStoreTransaction&, const IDBKeyData&, const IndexIDToIndexKeyMap&, const IDBValue&);
uint64_t currentKeyGeneratorValue() const { return m_keyGeneratorValue; }
void setKeyGeneratorValue(uint64_t value) { m_keyGeneratorValue = value; }
void clear();
void replaceKeyValueStore(std::unique_ptr<KeyValueMap>&&, std::unique_ptr<IDBKeyDataSet>&&);
ThreadSafeDataBuffer valueForKey(const IDBKeyData&) const;
ThreadSafeDataBuffer valueForKeyRange(const IDBKeyRangeData&) const;
IDBKeyData lowestKeyWithRecordInRange(const IDBKeyRangeData&) const;
IDBGetResult indexValueForKeyRange(IDBIndexIdentifier, IndexedDB::IndexRecordType, const IDBKeyRangeData&) const;
uint64_t countForKeyRange(std::optional<IDBIndexIdentifier>, const IDBKeyRangeData&) const;
void getAllRecords(const IDBKeyRangeData&, std::optional<uint32_t> count, IndexedDB::GetAllType, IDBGetAllResult&) const;
const IDBObjectStoreInfo& info() const { return m_info; }
IDBObjectStoreInfo& info() { return m_info; }
MemoryObjectStoreCursor* maybeOpenCursor(const IDBCursorInfo&, MemoryBackingStoreTransaction&);
IDBKeyDataSet* orderedKeys() { return m_orderedKeys.get(); }
MemoryIndex* indexForIdentifier(IDBIndexIdentifier);
void maybeRestoreDeletedIndex(Ref<MemoryIndex>&&);
void rename(const String& newName) { m_info.rename(newName); }
void renameIndex(MemoryIndex&, const String& newName);
RefPtr<MemoryIndex> takeIndexByIdentifier(IDBIndexIdentifier);
private:
MemoryObjectStore(const IDBObjectStoreInfo&);
IDBKeyDataSet::iterator lowestIteratorInRange(const IDBKeyRangeData&, bool reverse) const;
IDBError populateIndexWithExistingRecords(MemoryIndex&);
IDBError updateIndexesForPutRecord(const IDBKeyData&, const IndexIDToIndexKeyMap&);
void updateIndexesForDeleteRecord(const IDBKeyData& value);
void updateCursorsForPutRecord(IDBKeyDataSet::iterator);
void updateCursorsForDeleteRecord(const IDBKeyData&);
IDBObjectStoreInfo m_info;
WeakPtr<MemoryBackingStoreTransaction> m_writeTransaction;
uint64_t m_keyGeneratorValue { 1 };
std::unique_ptr<KeyValueMap> m_keyValueStore;
std::unique_ptr<IDBKeyDataSet> m_orderedKeys;
void unregisterIndex(MemoryIndex&);
HashMap<IDBIndexIdentifier, RefPtr<MemoryIndex>> m_indexesByIdentifier;
HashMap<String, RefPtr<MemoryIndex>> m_indexesByName;
HashMap<IDBResourceIdentifier, std::unique_ptr<MemoryObjectStoreCursor>> m_cursors;
};
} // namespace IDBServer
} // namespace WebCore
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