System.Data.SQLite
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Overview
Comment:Further refinements.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | sessions
Files: files | file ages | folders
SHA1: a16ea17d383872c9820e82933e0eed5531d28ef5
User & Date: mistachkin 2017-10-05 22:33:56
Context
2017-10-05
22:55
The 'Apply' methods logically belong to the change set, not the session. check-in: baed0aa503 user: mistachkin tags: sessions
22:33
Further refinements. check-in: a16ea17d38 user: mistachkin tags: sessions
22:19
Fix some inconsistencies in the API, minor cleanup. check-in: 520bab9c18 user: mistachkin tags: sessions
Changes
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Changes to System.Data.SQLite/SQLiteSessions.cs.

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    }
    #endregion

    ///////////////////////////////////////////////////////////////////////////

    #region Session Extension Delegates
    public delegate bool SessionTableFilterCallback(
        object context,
        string name
    );

    ///////////////////////////////////////////////////////////////////////////

    public delegate SQLiteChangeSetConflictResult SessionConflictCallback(
        object context,
        SQLiteChangeSetConflictType type,
        ISQLiteChangeSetMetadataItem item
    );
    #endregion

    ///////////////////////////////////////////////////////////////////////////

................................................................................

    public interface ISQLiteChangeGroup
    {
        void AddChangeSet(byte[] rawData);
        void AddChangeSet(Stream stream);

        void CreateChangeSet(ref byte[] rawData);
        void CreateChangeSet(Stream stream, SQLiteConnectionFlags flags);
    }

    ///////////////////////////////////////////////////////////////////////////

    public interface ISQLiteChangeSetMetadataItem
    {
        string TableName { get; }
................................................................................

        bool IsEmpty();

        void AttachTable(string name);

        void SetTableFilter(
            SessionTableFilterCallback callback,
            object context
        );

        void CreateChangeSet(ref byte[] rawData);
        void CreateChangeSet(Stream stream, SQLiteConnectionFlags flags);

        void CreatePatchSet(ref byte[] rawData);
        void CreatePatchSet(Stream stream, SQLiteConnectionFlags flags);

        void LoadDifferencesFromTable(
            string fromDatabaseName,
            string tableName
        );

        void ApplyChangeSet(
            byte[] rawData,
            SessionConflictCallback conflictCallback,
            object context
        );

        void ApplyChangeSet(
            Stream stream,
            SessionConflictCallback conflictCallback,
            SessionTableFilterCallback tableFilterCallback,
            object context
        );
    }
    #endregion

    ///////////////////////////////////////////////////////////////////////////

    #region SQLiteChangeSetIterator Class
................................................................................
        #region Private Data
        private SQLiteConnection connection;
        private IntPtr session;

        ///////////////////////////////////////////////////////////////////////

        private SessionTableFilterCallback tableFilterCallback;
        private object tableFilterContext;
        #endregion

        ///////////////////////////////////////////////////////////////////////

        #region Public Constructors
        public SQLiteSession(
            SQLiteConnection connection,
................................................................................
        {
            if (session == IntPtr.Zero)
                throw new InvalidOperationException("session is not open");
        }

        ///////////////////////////////////////////////////////////////////////








        #region Native Callback Methods
        private int xFilter(
            IntPtr context, /* NOT USED */
            byte[] tblName
            )
        {
            return tableFilterCallback(tableFilterContext,
                SQLiteString.GetStringFromUtf8Bytes(tblName)) ? 1 : 0;
        }
        #endregion
        #endregion

        ///////////////////////////////////////////////////////////////////////

................................................................................
                throw new SQLiteException(rc, "sqlite3session_attach");
        }

        ///////////////////////////////////////////////////////////////////////

        public void SetTableFilter(
            SessionTableFilterCallback callback,
            object context
            )
        {
            CheckDisposed();
            CheckHandle();

            this.tableFilterCallback = callback;
            this.tableFilterContext = context;

            UnsafeNativeMethods.sqlite3session_table_filter(
                session, xFilter, IntPtr.Zero);
        }

        ///////////////////////////////////////////////////////////////////////

................................................................................
                }
            }
        }

        ///////////////////////////////////////////////////////////////////////

        public void CreateChangeSet(
            Stream stream,
            SQLiteConnectionFlags flags
            )
        {
            CheckDisposed();
            CheckHandle();



            SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3session_changeset_strm(
                session, new SQLiteStreamAdapter(stream, flags).xOutput,
                IntPtr.Zero);

            if (rc != SQLiteErrorCode.Ok)
                throw new SQLiteException(rc, "sqlite3session_changeset_strm");
................................................................................
                }
            }
        }

        ///////////////////////////////////////////////////////////////////////

        public void CreatePatchSet(
            Stream stream,
            SQLiteConnectionFlags flags
            )
        {
            CheckDisposed();
            CheckHandle();



            SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3session_patchset_strm(
                session, new SQLiteStreamAdapter(stream, flags).xOutput,
                IntPtr.Zero);

            if (rc != SQLiteErrorCode.Ok)
                throw new SQLiteException(rc, "sqlite3session_patchset_strm");
................................................................................
            byte[] rawData,
            SessionConflictCallback conflictCallback,
            object clientData
            )
        {
            CheckDisposed();



            int nData = 0;
            IntPtr pData = IntPtr.Zero;
























































            SQLiteConnectionFlags flags = connection.Flags;


































            UnsafeNativeMethods.xSessionConflict xConflict = new UnsafeNativeMethods.xSessionConflict(delegate(IntPtr context, SQLiteChangeSetConflictType type, IntPtr iterator)




            {
                ISQLiteChangeSetMetadataItem item = null;

                try
                {
                    return conflictCallback(clientData, type, item);
                }
................................................................................
                        // do nothing.
                    }
                }

                return SQLiteChangeSetConflictResult.Abort;
            });




            SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3changeset_apply(
                SQLiteConnection.GetNativeHandle(connection), nData, pData,

                null, xConflict, IntPtr.Zero);
        }

        ///////////////////////////////////////////////////////////////////////

        public void ApplyChangeSet(
            Stream stream,
            SessionConflictCallback conflictCallback,
            SessionTableFilterCallback tableFilterCallback,
            object context
            )
        {
            CheckDisposed();

            throw new NotImplementedException();
        }
        #endregion

        ///////////////////////////////////////////////////////////////////////

        #region IDisposable Members
        public void Dispose()







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    }
    #endregion

    ///////////////////////////////////////////////////////////////////////////

    #region Session Extension Delegates
    public delegate bool SessionTableFilterCallback(
        object clientData,
        string name
    );

    ///////////////////////////////////////////////////////////////////////////

    public delegate SQLiteChangeSetConflictResult SessionConflictCallback(
        object clientData,
        SQLiteChangeSetConflictType type,
        ISQLiteChangeSetMetadataItem item
    );
    #endregion

    ///////////////////////////////////////////////////////////////////////////

................................................................................

    public interface ISQLiteChangeGroup
    {
        void AddChangeSet(byte[] rawData);
        void AddChangeSet(Stream stream);

        void CreateChangeSet(ref byte[] rawData);
        void CreateChangeSet(Stream stream);
    }

    ///////////////////////////////////////////////////////////////////////////

    public interface ISQLiteChangeSetMetadataItem
    {
        string TableName { get; }
................................................................................

        bool IsEmpty();

        void AttachTable(string name);

        void SetTableFilter(
            SessionTableFilterCallback callback,
            object clientData
        );

        void CreateChangeSet(ref byte[] rawData);
        void CreateChangeSet(Stream stream);

        void CreatePatchSet(ref byte[] rawData);
        void CreatePatchSet(Stream stream);

        void LoadDifferencesFromTable(
            string fromDatabaseName,
            string tableName
        );

        void ApplyChangeSet(
            byte[] rawData,
            SessionConflictCallback conflictCallback,
            object clientData
        );

        void ApplyChangeSet(
            Stream stream,
            SessionConflictCallback conflictCallback,
            SessionTableFilterCallback tableFilterCallback,
            object clientData
        );
    }
    #endregion

    ///////////////////////////////////////////////////////////////////////////

    #region SQLiteChangeSetIterator Class
................................................................................
        #region Private Data
        private SQLiteConnection connection;
        private IntPtr session;

        ///////////////////////////////////////////////////////////////////////

        private SessionTableFilterCallback tableFilterCallback;
        private object tableFilterClientData;
        #endregion

        ///////////////////////////////////////////////////////////////////////

        #region Public Constructors
        public SQLiteSession(
            SQLiteConnection connection,
................................................................................
        {
            if (session == IntPtr.Zero)
                throw new InvalidOperationException("session is not open");
        }

        ///////////////////////////////////////////////////////////////////////

        private SQLiteConnectionFlags GetConnectionFlags()
        {
            return SQLiteConnectionFlags.None;
        }

        ///////////////////////////////////////////////////////////////////////

        #region Native Callback Methods
        private int xFilter(
            IntPtr context, /* NOT USED */
            byte[] tblName
            )
        {
            return tableFilterCallback(tableFilterClientData,
                SQLiteString.GetStringFromUtf8Bytes(tblName)) ? 1 : 0;
        }
        #endregion
        #endregion

        ///////////////////////////////////////////////////////////////////////

................................................................................
                throw new SQLiteException(rc, "sqlite3session_attach");
        }

        ///////////////////////////////////////////////////////////////////////

        public void SetTableFilter(
            SessionTableFilterCallback callback,
            object clientData
            )
        {
            CheckDisposed();
            CheckHandle();

            this.tableFilterCallback = callback;
            this.tableFilterClientData = clientData;

            UnsafeNativeMethods.sqlite3session_table_filter(
                session, xFilter, IntPtr.Zero);
        }

        ///////////////////////////////////////////////////////////////////////

................................................................................
                }
            }
        }

        ///////////////////////////////////////////////////////////////////////

        public void CreateChangeSet(
            Stream stream

            )
        {
            CheckDisposed();
            CheckHandle();

            SQLiteConnectionFlags flags = GetConnectionFlags();

            SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3session_changeset_strm(
                session, new SQLiteStreamAdapter(stream, flags).xOutput,
                IntPtr.Zero);

            if (rc != SQLiteErrorCode.Ok)
                throw new SQLiteException(rc, "sqlite3session_changeset_strm");
................................................................................
                }
            }
        }

        ///////////////////////////////////////////////////////////////////////

        public void CreatePatchSet(
            Stream stream

            )
        {
            CheckDisposed();
            CheckHandle();

            SQLiteConnectionFlags flags = GetConnectionFlags();

            SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3session_patchset_strm(
                session, new SQLiteStreamAdapter(stream, flags).xOutput,
                IntPtr.Zero);

            if (rc != SQLiteErrorCode.Ok)
                throw new SQLiteException(rc, "sqlite3session_patchset_strm");
................................................................................
            byte[] rawData,
            SessionConflictCallback conflictCallback,
            object clientData
            )
        {
            CheckDisposed();

            SQLiteConnectionFlags flags = GetConnectionFlags();

            int nData = 0;
            IntPtr pData = IntPtr.Zero;

            UnsafeNativeMethods.xSessionConflict xConflict =
                new UnsafeNativeMethods.xSessionConflict(
                    delegate(IntPtr context,
                             SQLiteChangeSetConflictType type,
                             IntPtr iterator)
            {
                ISQLiteChangeSetMetadataItem item = null;

                try
                {
                    return conflictCallback(clientData, type, item);
                }
                catch (Exception e)
                {
                    try
                    {
                        if ((flags & SQLiteConnectionFlags.LogCallbackException) ==
                                SQLiteConnectionFlags.LogCallbackException)
                        {
                            SQLiteLog.LogMessage(SQLiteBase.COR_E_EXCEPTION,
                                HelperMethods.StringFormat(CultureInfo.CurrentCulture,
                                "Caught exception in \"xConflict\" method: {0}",
                                e)); /* throw */
                        }
                    }
                    catch
                    {
                        // do nothing.
                    }
                }

                return SQLiteChangeSetConflictResult.Abort;
            });

            SQLiteConnectionHandle handle = SQLiteConnection.GetNativeHandle(
                connection);

            SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3changeset_apply(
                handle, nData, pData, null, xConflict, IntPtr.Zero);

            if (rc != SQLiteErrorCode.Ok)
                throw new SQLiteException(rc, "sqlite3changeset_apply");
        }

        ///////////////////////////////////////////////////////////////////////

        public void ApplyChangeSet(
            Stream stream,
            SessionConflictCallback conflictCallback,
            SessionTableFilterCallback tableFilterCallback,
            object clientData
            )
        {
            CheckDisposed();

            SQLiteConnectionFlags flags = GetConnectionFlags();

            UnsafeNativeMethods.xSessionFilter xFilter =
                new UnsafeNativeMethods.xSessionFilter(
                    delegate(IntPtr context, byte[] tblName)
            {
                try
                {
                    string name = SQLiteString.GetStringFromUtf8Bytes(
                        tblName);

                    return tableFilterCallback(clientData, name) ? 1 : 0;
                }
                catch (Exception e)
                {
                    try
                    {
                        if ((flags & SQLiteConnectionFlags.LogCallbackException) ==
                                SQLiteConnectionFlags.LogCallbackException)
                        {
                            SQLiteLog.LogMessage(SQLiteBase.COR_E_EXCEPTION,
                                HelperMethods.StringFormat(CultureInfo.CurrentCulture,
                                "Caught exception in \"xFilter\" method: {0}",
                                e)); /* throw */
                        }
                    }
                    catch
                    {
                        // do nothing.
                    }
                }

                return 0;
            });

            UnsafeNativeMethods.xSessionConflict xConflict =
                new UnsafeNativeMethods.xSessionConflict(
                    delegate(IntPtr context,
                             SQLiteChangeSetConflictType type,
                             IntPtr iterator)
            {
                ISQLiteChangeSetMetadataItem item = null;

                try
                {
                    return conflictCallback(clientData, type, item);
                }
................................................................................
                        // do nothing.
                    }
                }

                return SQLiteChangeSetConflictResult.Abort;
            });

            SQLiteConnectionHandle handle = SQLiteConnection.GetNativeHandle(
                connection);

            SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3changeset_apply_strm(

                handle, new SQLiteStreamAdapter(stream, flags).xInput,
                IntPtr.Zero, xFilter, xConflict, IntPtr.Zero);




            if (rc != SQLiteErrorCode.Ok)
                throw new SQLiteException(rc, "sqlite3changeset_apply_strm");








        }
        #endregion

        ///////////////////////////////////////////////////////////////////////

        #region IDisposable Members
        public void Dispose()