System.Data.SQLite

Check-in [e3f2fe8d85]
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Overview
Comment:Create the metadata item for the xConflict callback.
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SHA1: e3f2fe8d85b01d6e61f54cc248a165ff9688d3e3
User & Date: mistachkin 2017-10-11 21:21:43.955
Context
2017-10-11
21:22
Add tests for Apply and CombineWith. check-in: d1def95f7b user: mistachkin tags: sessions
21:21
Create the metadata item for the xConflict callback. check-in: e3f2fe8d85 user: mistachkin tags: sessions
05:18
Wrap calls to the SessionTableFilterCallback delegate in a try/catch. check-in: 9c4784ee2f user: mistachkin tags: sessions
Changes
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Changes to System.Data.SQLite/SQLiteSession.cs.
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        #endregion
    }
    #endregion

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

    #region SQLiteChangeSetIterator Class
    internal abstract class SQLiteChangeSetIterator : IDisposable
    internal class SQLiteChangeSetIterator : IDisposable
    {
        #region Private Data
        private IntPtr iterator;

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

        private bool ownHandle;
        #endregion

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

        #region Protected Constructors
        protected SQLiteChangeSetIterator(
            IntPtr iterator
            IntPtr iterator,
            bool ownHandle
            )
        {
            this.iterator = iterator;
            this.ownHandle = ownHandle;
        }
        #endregion

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

        #region Private Methods
        internal void CheckHandle()
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                    }
            }
        }
        #endregion

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

        #region Static "Factory" Methods
        public static SQLiteChangeSetIterator Attach(
            IntPtr iterator
            )
        {
            return new SQLiteChangeSetIterator(iterator, false);
        }
        #endregion

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

        #region IDisposable Members
        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }
        #endregion
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                    //////////////////////////////////////
                    // release unmanaged resources here...
                    //////////////////////////////////////

                    if (iterator != IntPtr.Zero)
                    {
                        if (ownHandle)
                        {
                        UnsafeNativeMethods.sqlite3changeset_finalize(
                            iterator);
                            UnsafeNativeMethods.sqlite3changeset_finalize(
                                iterator);
                        }

                        iterator = IntPtr.Zero;
                    }
                }
            }
            finally
            {
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        #endregion

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

        #region Private Constructors
        private SQLiteMemoryChangeSetIterator(
            IntPtr pData,
            IntPtr iterator
            IntPtr iterator,
            bool ownHandle
            )
            : base(iterator)
            : base(iterator, ownHandle)
        {
            this.pData = pData;
        }
        #endregion

        ///////////////////////////////////////////////////////////////////////
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                SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3changeset_start(
                    ref iterator, nData, pData);

                if (rc != SQLiteErrorCode.Ok)
                    throw new SQLiteException(rc, "sqlite3changeset_start");

                result = new SQLiteMemoryChangeSetIterator(pData, iterator);
                result = new SQLiteMemoryChangeSetIterator(
                    pData, iterator, true);
            }
            finally
            {
                if (result == null)
                {
                    if (iterator != IntPtr.Zero)
                    {
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    #region SQLiteStreamChangeSetIterator Class
    internal sealed class SQLiteStreamChangeSetIterator :
        SQLiteChangeSetIterator
    {
        #region Private Constructors
        private SQLiteStreamChangeSetIterator(
            IntPtr iterator
            IntPtr iterator,
            bool ownHandle
            )
            : base(iterator)
            : base(iterator, ownHandle)
        {
            // do nothing.
        }
        #endregion

        ///////////////////////////////////////////////////////////////////////
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                SQLiteErrorCode rc = UnsafeNativeMethods.sqlite3changeset_start_strm(
                    ref iterator, new SQLiteStreamAdapter(stream, flags).xInput,
                    IntPtr.Zero);

                if (rc != SQLiteErrorCode.Ok)
                    throw new SQLiteException(rc, "sqlite3changeset_start_strm");

                result = new SQLiteStreamChangeSetIterator(iterator);
                result = new SQLiteStreamChangeSetIterator(iterator, true);
            }
            finally
            {
                if (result == null)
                {
                    if (iterator != IntPtr.Zero)
                    {
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        {
            // do nothing.
        }
        #endregion

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

        #region Private Methods
        private ISQLiteChangeSetMetadataItem CreateMetadataItem(
            IntPtr iterator
            )
        {
            return new SQLiteChangeSetMetadataItem(
                SQLiteChangeSetIterator.Attach(iterator));
        }
        #endregion

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

        #region Protected Methods
        protected UnsafeNativeMethods.xSessionFilter GetDelegate(
            SessionTableFilterCallback tableFilterCallback,
            object clientData
            )
        {
            if (tableFilterCallback == null)
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            UnsafeNativeMethods.xSessionConflict xConflict;

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

                try
                {
                    if (item == null)
                    {
                        throw new SQLiteException(
                            "could not create metadata item");
                    }

                    return conflictCallback(clientData, type, item);
                }
                catch (Exception e)
                {
                    try
                    {
                        if (HelperMethods.LogCallbackExceptions(GetFlags()))
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