text: /*
   * 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.
   *
   * 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 IDBDatabaseBackendImpl_h
  #define IDBDatabaseBackendImpl_h
  
  #include "IDBCallbacks.h"
  #include "IDBMetadata.h"
  #include <stdint.h>
  #include <wtf/Deque.h>
  #include <wtf/HashMap.h>
  #include <wtf/ListHashSet.h>
  
  #if ENABLE(INDEXED_DATABASE)
  
  namespace WebCore {
  
  class IDBBackingStore;
  class IDBDatabase;
  class IDBFactoryBackendImpl;
  class IDBTransactionBackendImpl;
  class IDBTransactionCoordinator;
  
  class IDBDatabaseBackendImpl : public IDBDatabaseBackendInterface {
  public:
      static PassRefPtr<IDBDatabaseBackendImpl> create(const String& name, IDBBackingStore* database, IDBFactoryBackendImpl*, const String& uniqueIdentifier);
      virtual ~IDBDatabaseBackendImpl();
  
      PassRefPtr<IDBBackingStore> backingStore() const;
  
      static const int64_t InvalidId = 0;
      int64_t id() const { return m_metadata.id; }
      void addObjectStore(const IDBObjectStoreMetadata&, int64_t newMaxObjectStoreId);
      void removeObjectStore(int64_t objectStoreId);
      void addIndex(int64_t objectStoreId, const IDBIndexMetadata&, int64_t newMaxIndexId);
      void removeIndex(int64_t objectStoreId, int64_t indexId);
  
      void openConnection(PassRefPtr<IDBCallbacks>, PassRefPtr<IDBDatabaseCallbacks>, int64_t transactionId, int64_t version);
      void deleteDatabase(PassRefPtr<IDBCallbacks>);
      const IDBDatabaseMetadata& metadata() const { return m_metadata; }
  
      // IDBDatabaseBackendInterface
      virtual void createObjectStore(int64_t transactionId, int64_t objectStoreId, const String& name, const IDBKeyPath&, bool autoIncrement);
      virtual void deleteObjectStore(int64_t transactionId, int64_t objectStoreId);
      virtual void createTransaction(int64_t transactionId, PassRefPtr<IDBDatabaseCallbacks>, const Vector<int64_t>& objectStoreIds, unsigned short mode);
      virtual void close(PassRefPtr<IDBDatabaseCallbacks>);
  
      virtual void commit(int64_t transactionId);
      virtual void abort(int64_t transactionId);
      virtual void abort(int64_t transactionId, PassRefPtr<IDBDatabaseError>);
  
      virtual void createIndex(int64_t transactionId, int64_t objectStoreId, int64_t indexId, const String& name, const IDBKeyPath&, bool unique, bool multiEntry);
      virtual void deleteIndex(int64_t transactionId, int64_t objectStoreId, int64_t indexId);
  
      IDBTransactionCoordinator* transactionCoordinator() const { return m_transactionCoordinator.get(); }
      void transactionStarted(PassRefPtr<IDBTransactionBackendImpl>);
      void transactionFinished(PassRefPtr<IDBTransactionBackendImpl>);
      void transactionFinishedAndCompleteFired(PassRefPtr<IDBTransactionBackendImpl>);
      void transactionFinishedAndAbortFired(PassRefPtr<IDBTransactionBackendImpl>);
  
      virtual void get(int64_t transactionId, int64_t objectStoreId, int64_t indexId, PassRefPtr<IDBKeyRange>, bool keyOnly, PassRefPtr<IDBCallbacks>) OVERRIDE;
      virtual void put(int64_t transactionId, int64_t objectStoreId, PassRefPtr<SharedBuffer> value, PassRefPtr<IDBKey>, PutMode, PassRefPtr<IDBCallbacks>, const Vector<int64_t>& indexIds, const Vector<IndexKeys>&) OVERRIDE;
      virtual void setIndexKeys(int64_t transactionId, int64_t objectStoreId, PassRefPtr<IDBKey> prpPrimaryKey, const Vector<int64_t>& indexIds, const Vector<IndexKeys>&) OVERRIDE;
      virtual void setIndexesReady(int64_t transactionId, int64_t objectStoreId, const Vector<int64_t>& indexIds) OVERRIDE;
      virtual void openCursor(int64_t transactionId, int64_t objectStoreId, int64_t indexId, PassRefPtr<IDBKeyRange>, IndexedDB::CursorDirection, bool keyOnly, TaskType, PassRefPtr<IDBCallbacks>) OVERRIDE;
      virtual void count(int64_t transactionId, int64_t objectStoreId, int64_t indexId, PassRefPtr<IDBKeyRange>, PassRefPtr<IDBCallbacks>) OVERRIDE;
      virtual void deleteRange(int64_t transactionId, int64_t objectStoreId, PassRefPtr<IDBKeyRange>, PassRefPtr<IDBCallbacks>) OVERRIDE;
      virtual void clear(int64_t transactionId, int64_t objectStoreId, PassRefPtr<IDBCallbacks>) OVERRIDE;
  
  private:
      IDBDatabaseBackendImpl(const String& name, IDBBackingStore* database, IDBFactoryBackendImpl*, const String& uniqueIdentifier);
  
      bool openInternal();
      void runIntVersionChangeTransaction(PassRefPtr<IDBCallbacks>, PassRefPtr<IDBDatabaseCallbacks>, int64_t transactionId, int64_t requestedVersion);
      size_t connectionCount();
      void processPendingCalls();
  
      bool isDeleteDatabaseBlocked();
      void deleteDatabaseFinal(PassRefPtr<IDBCallbacks>);
  
      class VersionChangeOperation;
  
      // When a "versionchange" transaction aborts, these restore the back-end object hierarchy.
      class VersionChangeAbortOperation;
  
      RefPtr<IDBBackingStore> m_backingStore;
      IDBDatabaseMetadata m_metadata;
  
      String m_identifier;
      // 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.
      RefPtr<IDBFactoryBackendImpl> m_factory;
  
      OwnPtr<IDBTransactionCoordinator> m_transactionCoordinator;
      RefPtr<IDBTransactionBackendImpl> m_runningVersionChangeTransaction;
  
      typedef HashMap<int64_t, IDBTransactionBackendImpl*> TransactionMap;
      TransactionMap m_transactions;
  
      class PendingOpenCall;
      Deque<OwnPtr<PendingOpenCall> > m_pendingOpenCalls;
      OwnPtr<PendingOpenCall> m_pendingSecondHalfOpen;
  
      class PendingDeleteCall;
      Deque<OwnPtr<PendingDeleteCall> > m_pendingDeleteCalls;
  
      typedef ListHashSet<RefPtr<IDBDatabaseCallbacks> > DatabaseCallbacksSet;
      DatabaseCallbacksSet m_databaseCallbacksSet;
  
      bool m_closingConnection;
  };
  
  } // namespace WebCore
  
  #endif
  
  #endif // IDBDatabaseBackendImpl_h
  