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/*
* Copyright (C) 2014, 2016 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. AND ITS CONTRIBUTORS ``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 ITS 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.
*/
#ifndef SQLiteIDBCursor_h
#define SQLiteIDBCursor_h
#if ENABLE(INDEXED_DATABASE)
#include "IDBIndexInfo.h"
#include "IDBKeyData.h"
#include "IDBKeyRangeData.h"
#include "IDBResourceIdentifier.h"
#include "SQLiteStatement.h"
#include <wtf/Noncopyable.h>
namespace WebCore {
class IDBCursorInfo;
class IDBGetResult;
namespace IDBServer {
class SQLiteIDBTransaction;
class SQLiteIDBCursor {
WTF_MAKE_NONCOPYABLE(SQLiteIDBCursor);
public:
static std::unique_ptr<SQLiteIDBCursor> maybeCreate(SQLiteIDBTransaction&, const IDBCursorInfo&);
static std::unique_ptr<SQLiteIDBCursor> maybeCreateBackingStoreCursor(SQLiteIDBTransaction&, const uint64_t objectStoreIdentifier, const uint64_t indexIdentifier, const IDBKeyRangeData&);
SQLiteIDBCursor(SQLiteIDBTransaction&, const IDBCursorInfo&);
SQLiteIDBCursor(SQLiteIDBTransaction&, uint64_t objectStoreID, uint64_t indexID, const IDBKeyRangeData&);
~SQLiteIDBCursor();
const IDBResourceIdentifier& identifier() const { return m_cursorIdentifier; }
SQLiteIDBTransaction* transaction() const { return m_transaction; }
int64_t objectStoreID() const { return m_objectStoreID; }
const IDBKeyData& currentKey() const { return m_currentKey; }
const IDBKeyData& currentPrimaryKey() const { return m_currentPrimaryKey; }
const Vector<uint8_t>& currentValueBuffer() const { return m_currentValueBuffer; }
bool advance(uint64_t count);
bool iterate(const IDBKeyData& targetKey);
bool didComplete() const { return m_completed; }
bool didError() const { return m_errored; }
void objectStoreRecordsChanged();
void currentData(IDBGetResult&);
private:
bool establishStatement();
bool createSQLiteStatement(const String& sql);
bool bindArguments();
void resetAndRebindStatement();
enum class AdvanceResult {
Success,
Failure,
ShouldAdvanceAgain
};
AdvanceResult internalAdvanceOnce();
bool advanceOnce();
bool advanceUnique();
SQLiteIDBTransaction* m_transaction;
IDBResourceIdentifier m_cursorIdentifier;
int64_t m_objectStoreID;
int64_t m_indexID { IDBIndexInfo::InvalidId };
IndexedDB::CursorDirection m_cursorDirection { IndexedDB::CursorDirection::Next };
IDBKeyRangeData m_keyRange;
IDBKeyData m_currentLowerKey;
IDBKeyData m_currentUpperKey;
IDBKeyData m_currentKey;
IDBKeyData m_currentPrimaryKey;
Vector<uint8_t> m_currentValueBuffer;
std::unique_ptr<SQLiteStatement> m_statement;
bool m_statementNeedsReset { false };
int64_t m_boundID { 0 };
bool m_completed { false };
bool m_errored { false };
bool m_backingStoreCursor { false };
};
} // namespace IDBServer
} // namespace WebCore
#endif // ENABLE(INDEXED_DATABASE)
#endif // SQLiteIDBCursor_h
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