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/*
* Copyright (C) 2014 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) && ENABLE(DATABASE_PROCESS)
#include "IDBIdentifier.h"
#include <WebCore/IDBDatabaseBackend.h>
#include <WebCore/IDBKeyData.h>
#include <WebCore/IDBKeyRangeData.h>
#include <WebCore/SQLiteStatement.h>
#include <wtf/Noncopyable.h>
namespace WebCore {
namespace IndexedDB {
enum class CursorDirection;
enum class CursorType;
}
}
namespace WebKit {
class SQLiteIDBTransaction;
class SQLiteIDBCursor {
WTF_MAKE_NONCOPYABLE(SQLiteIDBCursor);
public:
static std::unique_ptr<SQLiteIDBCursor> maybeCreate(SQLiteIDBTransaction*, const IDBIdentifier& cursorIdentifier, int64_t objectStoreID, int64_t indexID, WebCore::IndexedDB::CursorDirection, WebCore::IndexedDB::CursorType, WebCore::IDBDatabaseBackend::TaskType, const WebCore::IDBKeyRangeData&);
const IDBIdentifier& identifier() const { return m_cursorIdentifier; }
SQLiteIDBTransaction* transaction() const { return m_transaction; }
int64_t objectStoreID() const { return m_objectStoreID; }
const WebCore::IDBKeyData& currentKey() const { return m_currentKey; }
const WebCore::IDBKeyData& currentPrimaryKey() const { return m_currentPrimaryKey; }
const Vector<uint8_t>& currentValueBuffer() const { return m_currentValueBuffer; }
bool advance(uint64_t count);
bool iterate(const WebCore::IDBKeyData& targetKey);
bool didError() const { return m_errored; }
void objectStoreRecordsChanged();
private:
SQLiteIDBCursor(SQLiteIDBTransaction*, const IDBIdentifier& cursorIdentifier, int64_t objectStoreID, int64_t indexID, WebCore::IndexedDB::CursorDirection, WebCore::IndexedDB::CursorType, WebCore::IDBDatabaseBackend::TaskType, const WebCore::IDBKeyRangeData&);
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;
IDBIdentifier m_cursorIdentifier;
int64_t m_objectStoreID;
int64_t m_indexID;
WebCore::IndexedDB::CursorDirection m_cursorDirection;
WebCore::IDBKeyRangeData m_keyRange;
WebCore::IDBKeyData m_currentLowerKey;
WebCore::IDBKeyData m_currentUpperKey;
int64_t m_currentRecordID;
WebCore::IDBKeyData m_currentKey;
WebCore::IDBKeyData m_currentPrimaryKey;
Vector<uint8_t> m_currentValueBuffer;
std::unique_ptr<WebCore::SQLiteStatement> m_statement;
bool m_statementNeedsReset;
int64_t m_boundID;
bool m_completed;
bool m_errored;
};
} // namespace WebKit
#endif // ENABLE(INDEXED_DATABASE) && ENABLE(DATABASE_PROCESS)
#endif // SQLiteIDBCursor_h
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