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/*
* Copyright (C) 2008, 2009, 2010, 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:
* 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 LocalStorageDatabase_h
#define LocalStorageDatabase_h
#include <WebCore/SQLiteDatabase.h>
#include <wtf/Forward.h>
#include <wtf/HashMap.h>
#include <wtf/RefPtr.h>
#include <wtf/ThreadSafeRefCounted.h>
class WorkQueue;
namespace WebCore {
class SecurityOrigin;
class StorageMap;
}
namespace WebKit {
class LocalStorageDatabaseTracker;
class LocalStorageDatabase : public ThreadSafeRefCounted<LocalStorageDatabase> {
public:
static PassRefPtr<LocalStorageDatabase> create(PassRefPtr<WorkQueue>, PassRefPtr<LocalStorageDatabaseTracker>, PassRefPtr<WebCore::SecurityOrigin>);
~LocalStorageDatabase();
// Will block until the import is complete.
void importItems(WebCore::StorageMap&);
void setItem(const String& key, const String& value);
void removeItem(const String& key);
void clear();
// Will block until all pending changes have been written to disk.
void close();
private:
LocalStorageDatabase(PassRefPtr<WorkQueue>, PassRefPtr<LocalStorageDatabaseTracker>, PassRefPtr<WebCore::SecurityOrigin>);
enum DatabaseOpeningStrategy {
CreateIfNonExistent,
SkipIfNonExistent
};
bool tryToOpenDatabase(DatabaseOpeningStrategy);
void openDatabase(DatabaseOpeningStrategy);
bool migrateItemTableIfNeeded();
void itemDidChange(const String& key, const String& value);
void scheduleDatabaseUpdate();
void updateDatabase();
void updateDatabaseWithChangedItems(const HashMap<String, String>&);
bool databaseIsEmpty();
RefPtr<WorkQueue> m_queue;
RefPtr<LocalStorageDatabaseTracker> m_tracker;
RefPtr<WebCore::SecurityOrigin> m_securityOrigin;
String m_databasePath;
WebCore::SQLiteDatabase m_database;
bool m_failedToOpenDatabase;
bool m_didImportItems;
bool m_isClosed;
bool m_didScheduleDatabaseUpdate;
bool m_shouldClearItems;
HashMap<String, String> m_changedItems;
};
} // namespace WebKit
#endif // LocalStorageDatabase_h
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