# IDBFactoryBackendImpl.h 
    
    
    /*
     * Copyright (C) 2010 Google 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.
     * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     *     its contributors may be used to endorse or promote products derived
     *     from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 IDBFactoryBackendImpl_h
    #define IDBFactoryBackendImpl_h
    
    #include "IDBFactoryBackendInterface.h"
    #include <wtf/HashMap.h>
    #include <wtf/text/StringHash.h>
    
    #if ENABLE(INDEXED_DATABASE)
    
    namespace WebCore {
    
    class DOMStringList;
    
    class IDBBackingStore;
    class IDBDatabaseBackendImpl;
    class IDBTransactionCoordinator;
    
    class IDBFactoryBackendImpl : public IDBFactoryBackendInterface {
    public:
        static PassRefPtr<IDBFactoryBackendImpl> create()
        {
            return adoptRef(new IDBFactoryBackendImpl());
        }
        virtual ~IDBFactoryBackendImpl();
    
        // Notifications from weak pointers.
        void removeIDBDatabaseBackend(const String& uniqueIdentifier);
        void addIDBBackingStore(const String& uniqueIdentifier, IDBBackingStore*);
        void removeIDBBackingStore(const String& uniqueIdentifier);
    
        virtual void open(const String& name, PassRefPtr<IDBCallbacks>, PassRefPtr<SecurityOrigin>, Frame*, const String& dataDir, int64_t maximumSize, BackingStoreType);
    
    private:
        IDBFactoryBackendImpl();
    
        typedef HashMap<String, IDBDatabaseBackendImpl*> IDBDatabaseBackendMap;
        IDBDatabaseBackendMap m_databaseBackendMap;
    
        typedef HashMap<String, IDBBackingStore*> IDBBackingStoreMap;
        IDBBackingStoreMap m_backingStoreMap;
    
        RefPtr<IDBTransactionCoordinator> m_transactionCoordinator;
    
        // Only one instance of the factory should exist at any given time.
        static IDBFactoryBackendImpl* idbFactoryBackendImpl;
    };
    
    } // namespace WebCore
    
    #endif
    
    #endif // IDBFactoryBackendImpl_h