/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
 * Copyright (C) 2013 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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#ifndef SQLTransactionBackendSync_h
#define SQLTransactionBackendSync_h

#include "modules/webdatabase/DatabaseBasicTypes.h"
#include "platform/heap/Handle.h"
#include "wtf/Forward.h"
#include "wtf/RefCounted.h"
#include "wtf/Vector.h"
#include "wtf/text/WTFString.h"

namespace blink {

class DatabaseSync;
class SQLResultSet;
class SQLTransactionClient;
class SQLTransactionSyncCallback;
class SQLValue;
class SQLiteTransaction;
class ExceptionState;

// Instances of this class should be created and used only on the worker's context thread.
class SQLTransactionBackendSync : public RefCountedWillBeGarbageCollectedFinalized<SQLTransactionBackendSync> {
public:
    virtual ~SQLTransactionBackendSync();
    void trace(Visitor*);

    PassRefPtrWillBeRawPtr<SQLResultSet> executeSQL(const String& sqlStatement, const Vector<SQLValue>& arguments, ExceptionState&);

    DatabaseSync* database() { return m_database.get(); }

    void begin(ExceptionState&);
    void execute(ExceptionState&);
    void commit(ExceptionState&);
    void rollback();
    void rollbackIfInProgress();

private:
    SQLTransactionBackendSync(DatabaseSync*, PassOwnPtr<SQLTransactionSyncCallback>, bool readOnly);

    RefPtrWillBeMember<DatabaseSync> m_database;
    OwnPtr<SQLTransactionSyncCallback> m_callback;
    bool m_readOnly;
    bool m_hasVersionMismatch;

    bool m_modifiedDatabase;
    OwnPtr<SQLTransactionClient> m_transactionClient;
    OwnPtr<SQLiteTransaction> m_sqliteTransaction;

    friend class SQLTransactionSync; // FIXME: Remove this once the front-end has been properly isolated.
};

} // namespace blink

#endif // SQLTransactionBackendSync_h
