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      1 /*
      2  * Copyright (C) 2010 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef IDBDatabaseBackendImpl_h
     27 #define IDBDatabaseBackendImpl_h
     28 
     29 #include "IDBCallbacks.h"
     30 #include "IDBDatabase.h"
     31 #include <wtf/Deque.h>
     32 #include <wtf/HashMap.h>
     33 #include <wtf/ListHashSet.h>
     34 
     35 #if ENABLE(INDEXED_DATABASE)
     36 
     37 namespace WebCore {
     38 
     39 class IDBBackingStore;
     40 class IDBDatabase;
     41 class IDBFactoryBackendImpl;
     42 class IDBObjectStoreBackendImpl;
     43 class IDBTransactionCoordinator;
     44 
     45 class IDBDatabaseBackendImpl : public IDBDatabaseBackendInterface {
     46 public:
     47     static PassRefPtr<IDBDatabaseBackendImpl> create(const String& name, IDBBackingStore* database, IDBTransactionCoordinator* coordinator, IDBFactoryBackendImpl* factory, const String& uniqueIdentifier)
     48     {
     49         return adoptRef(new IDBDatabaseBackendImpl(name, database, coordinator, factory, uniqueIdentifier));
     50     }
     51     virtual ~IDBDatabaseBackendImpl();
     52 
     53     PassRefPtr<IDBBackingStore> backingStore() const;
     54 
     55     static const int64_t InvalidId = 0;
     56     int64_t id() const { return m_id; }
     57     void open(PassRefPtr<IDBDatabaseCallbacks>);
     58 
     59     virtual String name() const { return m_name; }
     60     virtual String version() const { return m_version; }
     61     virtual PassRefPtr<DOMStringList> objectStoreNames() const;
     62 
     63     virtual PassRefPtr<IDBObjectStoreBackendInterface> createObjectStore(const String& name, const String& keyPath, bool autoIncrement, IDBTransactionBackendInterface*, ExceptionCode&);
     64     virtual void deleteObjectStore(const String& name, IDBTransactionBackendInterface*, ExceptionCode&);
     65     virtual void setVersion(const String& version, PassRefPtr<IDBCallbacks>, PassRefPtr<IDBDatabaseCallbacks>, ExceptionCode&);
     66     virtual PassRefPtr<IDBTransactionBackendInterface> transaction(DOMStringList* objectStoreNames, unsigned short mode, ExceptionCode&);
     67     virtual void close(PassRefPtr<IDBDatabaseCallbacks>);
     68 
     69     PassRefPtr<IDBObjectStoreBackendInterface> objectStore(const String& name);
     70     IDBTransactionCoordinator* transactionCoordinator() const { return m_transactionCoordinator.get(); }
     71 
     72 private:
     73     IDBDatabaseBackendImpl(const String& name, IDBBackingStore* database, IDBTransactionCoordinator*, IDBFactoryBackendImpl*, const String& uniqueIdentifier);
     74 
     75     void loadObjectStores();
     76 
     77     static void createObjectStoreInternal(ScriptExecutionContext*, PassRefPtr<IDBDatabaseBackendImpl>, PassRefPtr<IDBObjectStoreBackendImpl>, PassRefPtr<IDBTransactionBackendInterface>);
     78     static void deleteObjectStoreInternal(ScriptExecutionContext*, PassRefPtr<IDBDatabaseBackendImpl>, PassRefPtr<IDBObjectStoreBackendImpl>, PassRefPtr<IDBTransactionBackendInterface>);
     79     static void setVersionInternal(ScriptExecutionContext*, PassRefPtr<IDBDatabaseBackendImpl>, const String& version, PassRefPtr<IDBCallbacks>, PassRefPtr<IDBTransactionBackendInterface>);
     80 
     81     // These are used as setVersion transaction abort tasks.
     82     static void removeObjectStoreFromMap(ScriptExecutionContext*, PassRefPtr<IDBDatabaseBackendImpl>, PassRefPtr<IDBObjectStoreBackendImpl>);
     83     static void addObjectStoreToMap(ScriptExecutionContext*, PassRefPtr<IDBDatabaseBackendImpl>, PassRefPtr<IDBObjectStoreBackendImpl>);
     84     static void resetVersion(ScriptExecutionContext*, PassRefPtr<IDBDatabaseBackendImpl>, const String& version);
     85 
     86     RefPtr<IDBBackingStore> m_backingStore;
     87     int64 m_id;
     88     String m_name;
     89     String m_version;
     90 
     91     String m_identifier;
     92     // This might not need to be a RefPtr since the factory's lifetime is that of the page group, but it's better to be conservitive than sorry.
     93     RefPtr<IDBFactoryBackendImpl> m_factory;
     94 
     95     typedef HashMap<String, RefPtr<IDBObjectStoreBackendImpl> > ObjectStoreMap;
     96     ObjectStoreMap m_objectStores;
     97 
     98     RefPtr<IDBTransactionCoordinator> m_transactionCoordinator;
     99 
    100     class PendingSetVersionCall;
    101     Deque<RefPtr<PendingSetVersionCall> > m_pendingSetVersionCalls;
    102 
    103     typedef ListHashSet<RefPtr<IDBDatabaseCallbacks> > DatabaseCallbacksSet;
    104     DatabaseCallbacksSet m_databaseCallbacksSet;
    105 };
    106 
    107 } // namespace WebCore
    108 
    109 #endif
    110 
    111 #endif // IDBDatabaseBackendImpl_h
    112