SmiGettersStream.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / Microsoft / SqlServer / Server / SmiGettersStream.cs / 1 / SmiGettersStream.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
//----------------------------------------------------------------------------- 
 
namespace Microsoft.SqlServer.Server {
    using System; 
    using System.Data.Common;
    using System.Data.SqlClient;
    using System.IO;
    using System.Diagnostics; 

    internal class SmiGettersStream : Stream { 
 
        private SmiEventSink_Default    _sink;
        private ITypedGettersV3         _getters; 
        private int                     _ordinal;
        private long                    _readPosition;
        private SmiMetaData             _metaData;
 
        internal SmiGettersStream( SmiEventSink_Default sink, ITypedGettersV3 getters, int ordinal, SmiMetaData metaData ) {
            Debug.Assert( null != sink ); 
            Debug.Assert( null != getters ); 
            Debug.Assert( 0 <= ordinal );
            Debug.Assert( null != metaData ); 

            _sink = sink;
            _getters = getters;
            _ordinal = ordinal; 
            _readPosition = 0;
            _metaData = metaData; 
        } 

        public override bool CanRead { 
            get {
                return true;
            }
        } 

        // If CanSeek is false, Position, Seek, Length, and SetLength should throw. 
        public override bool CanSeek { 
            get {
                return false; 
            }
        }

        public override bool CanWrite { 
            get {
                return false; 
            } 
        }
 
        public override long Length {
            get {
                return ValueUtilsSmi.GetBytesInternal( _sink, _getters, _ordinal, _metaData, 0, null, 0, 0, false );
            } 
        }
 
        public override long Position { 
            get {
                return _readPosition; 
            }
            set {
                throw SQL.StreamSeekNotSupported();
            } 
        }
 
        public override void Flush() { 
            throw SQL.StreamWriteNotSupported();
        } 

        public override long Seek(long offset, SeekOrigin origin) {
            throw SQL.StreamSeekNotSupported();
        } 

        public override void SetLength(long value) { 
            throw SQL.StreamWriteNotSupported(); 
        }
 
        public override int Read( byte[] buffer, int offset, int count ) {
            long bytesRead = ValueUtilsSmi.GetBytesInternal( _sink, _getters, _ordinal, _metaData, _readPosition, buffer, offset, count, false );
            _readPosition += bytesRead;
 
            return checked( (int) bytesRead );
        } 
 
        public override void Write( byte[] buffer, int offset, int count ) {
            throw SQL.StreamWriteNotSupported(); 
        }
    }

} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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