MemoryRecordBuffer.cs source code in C# .NET

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

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
// [....] 
//----------------------------------------------------------------------------- 

namespace Microsoft.SqlServer.Server { 

    using System;
    using System.Data.SqlTypes;
    using System.Diagnostics; 

    // Class for implementing a record object used in out-of-proc scenarios. 
    internal sealed class MemoryRecordBuffer : SmiRecordBuffer { 

        private SqlRecordBuffer[] _buffer; 

        internal MemoryRecordBuffer(SmiMetaData[] metaData) {
            Debug.Assert(null != metaData, "invalid attempt to instantiate MemoryRecordBuffer with null SmiMetaData[]");
 
            _buffer = new SqlRecordBuffer[metaData.Length];
 
            for (int i = 0; i < _buffer.Length; ++i) { 
                _buffer[i] = new SqlRecordBuffer(metaData[i]);
            } 
        }

        #region Getters
        // Null test 
        //      valid for all types
        public override bool IsDBNull(SmiEventSink sink, int ordinal) { 
            return _buffer[ordinal].IsNull; 
        }
 
        // Check what type current sql_variant value is
        //      valid for SqlDbType.Variant
        public override SmiMetaData GetVariantType(SmiEventSink sink, int ordinal) {
            return _buffer[ordinal].VariantType; 
        }
 
        //  valid for SqlDbType.Bit 
        public override Boolean GetBoolean(SmiEventSink sink, int ordinal) {
            return _buffer[ordinal].Boolean; 
        }

        //  valid for SqlDbType.TinyInt
        public override Byte GetByte(SmiEventSink sink, int ordinal) { 
            return _buffer[ordinal].Byte;
        } 
 
        // valid for SqlDbTypes: Binary, VarBinary, Image, Udt, Xml, Char, VarChar, Text, NChar, NVarChar, NText
        //  (Character type support needed for ExecuteXmlReader handling) 
        public override Int64 GetBytesLength(SmiEventSink sink, int ordinal) {
            return _buffer[ordinal].BytesLength;
        }
        public override int GetBytes(SmiEventSink sink, int ordinal, long fieldOffset, byte[] buffer, int bufferOffset, int length) { 
            return _buffer[ordinal].GetBytes(fieldOffset, buffer, bufferOffset, length);
        } 
 
        // valid for character types: Char, VarChar, Text, NChar, NVarChar, NText
        public override Int64 GetCharsLength(SmiEventSink sink, int ordinal) { 
            return _buffer[ordinal].CharsLength;
        }
        public override int GetChars(SmiEventSink sink, int ordinal, long fieldOffset, char[] buffer, int bufferOffset, int length) {
            return _buffer[ordinal].GetChars(fieldOffset, buffer, bufferOffset, length); 
        }
        public override String GetString(SmiEventSink sink, int ordinal) { 
            return _buffer[ordinal].String; 
        }
 
        // valid for SqlDbType.SmallInt
        public override Int16 GetInt16(SmiEventSink sink, int ordinal) {
            return _buffer[ordinal].Int16;
        } 

        // valid for SqlDbType.Int 
        public override Int32 GetInt32(SmiEventSink sink, int ordinal) { 
            return _buffer[ordinal].Int32;
        } 

        // valid for SqlDbType.BigInt, SqlDbType.Money, SqlDbType.SmallMoney
        public override Int64 GetInt64(SmiEventSink sink, int ordinal) {
            return _buffer[ordinal].Int64; 
        }
 
        // valid for SqlDbType.Real 
        public override Single GetSingle(SmiEventSink sink, int ordinal) {
            return _buffer[ordinal].Single; 
        }

        // valid for SqlDbType.Float
        public override Double GetDouble(SmiEventSink sink, int ordinal) { 
            return _buffer[ordinal].Double;
        } 
 
        // valid for SqlDbType.Numeric (uses SqlDecimal since Decimal cannot hold full range)
        public override SqlDecimal GetSqlDecimal(SmiEventSink sink, int ordinal) { 
            return _buffer[ordinal].SqlDecimal;
        }

        // valid for DateTime, SmallDateTime, Date, and DateTime2 
        public override DateTime GetDateTime(SmiEventSink sink, int ordinal) {
            return _buffer[ordinal].DateTime; 
        } 

        // valid for UniqueIdentifier 
        public override Guid GetGuid(SmiEventSink sink, int ordinal) {
            return _buffer[ordinal].Guid;
        }
 
        // valid for SqlDbType.Time
        public override TimeSpan GetTimeSpan(SmiEventSink sink, int ordinal) { 
            return _buffer[ordinal].TimeSpan; 
        }
 
        // valid for DateTimeOffset
        public override DateTimeOffset GetDateTimeOffset(SmiEventSink sink, int ordinal) {
            return _buffer[ordinal].DateTimeOffset;
        } 
        #endregion
 
        #region Setters 
        // Set value to null
        //  valid for all types 
        public override void SetDBNull(SmiEventSink sink, int ordinal) {
            _buffer[ordinal].SetNull();
        }
 
        //  valid for SqlDbType.Bit
        public override void SetBoolean(SmiEventSink sink, int ordinal, Boolean value) { 
            _buffer[ordinal].Boolean = value; 
        }
 
        //  valid for SqlDbType.TinyInt
        public override void SetByte(SmiEventSink sink, int ordinal, Byte value) {
            _buffer[ordinal].Byte = value;
        } 

        // Semantics for SetBytes are to modify existing value, not overwrite 
        //  Use in combination with SetLength to ensure overwriting when necessary 
        // valid for SqlDbTypes: Binary, VarBinary, Image, Udt, Xml
        //      (VarBinary assumed for variants) 
        public override int SetBytes(SmiEventSink sink, int ordinal, long fieldOffset, byte[] buffer, int bufferOffset, int length) {
            return _buffer[ordinal].SetBytes(fieldOffset, buffer, bufferOffset, length);
        }
        public override void SetBytesLength(SmiEventSink sink, int ordinal, long length) { 
            _buffer[ordinal].BytesLength = length;
        } 
 
        // Semantics for SetChars are to modify existing value, not overwrite
        //  Use in combination with SetLength to ensure overwriting when necessary 
        // valid for character types: Char, VarChar, Text, NChar, NVarChar, NText
        //      (NVarChar and global clr collation assumed for variants)
        public override int SetChars(SmiEventSink sink, int ordinal, long fieldOffset, char[] buffer, int bufferOffset, int length) {
            return _buffer[ordinal].SetChars(fieldOffset, buffer, bufferOffset, length); 
        }
        public override void SetCharsLength(SmiEventSink sink, int ordinal, long length) { 
            _buffer[ordinal].CharsLength = length; 
        }
 
        // valid for character types: Char, VarChar, Text, NChar, NVarChar, NText
        public override void SetString(SmiEventSink sink, int ordinal, string value, int offset, int length) {
            Debug.Assert(offset == 0 && length <= value.Length, "Invalid string length or offset"); // for sqlvariant, length could be less than value.Length
 
            _buffer[ordinal].String = value.Substring(offset, length); // Perf test shows that Substring method has already optimized the case where length = value.Length
        } 
 
        // valid for SqlDbType.SmallInt
        public override void SetInt16(SmiEventSink sink, int ordinal, Int16 value) { 
            _buffer[ordinal].Int16 = value;
        }

        // valid for SqlDbType.Int 
        public override void SetInt32(SmiEventSink sink, int ordinal, Int32 value) {
            _buffer[ordinal].Int32 = value; 
        } 

        // valid for SqlDbType.BigInt, SqlDbType.Money, SqlDbType.SmallMoney 
        public override void SetInt64(SmiEventSink sink, int ordinal, Int64 value) {
            _buffer[ordinal].Int64 = value;
        }
 
        // valid for SqlDbType.Real
        public override void SetSingle(SmiEventSink sink, int ordinal, Single value) { 
            _buffer[ordinal].Single = value; 
        }
 
        // valid for SqlDbType.Float
        public override void SetDouble(SmiEventSink sink, int ordinal,  Double value) {
            _buffer[ordinal].Double = value;
        } 

        // valid for SqlDbType.Numeric (uses SqlDecimal since Decimal cannot hold full range) 
        public override void SetSqlDecimal(SmiEventSink sink, int ordinal, SqlDecimal value) { 
            _buffer[ordinal].SqlDecimal = value;
        } 

        // valid for DateTime, SmallDateTime, Date, and DateTime2
        public override void SetDateTime(SmiEventSink sink, int ordinal, DateTime value) {
            _buffer[ordinal].DateTime = value; 
        }
 
        // valid for UniqueIdentifier 
        public override void SetGuid(SmiEventSink sink, int ordinal, Guid value) {
            _buffer[ordinal].Guid = value; 
        }

        // SqlDbType.Time
        public override void SetTimeSpan(SmiEventSink sink, int ordinal, TimeSpan value) { 
            _buffer[ordinal].TimeSpan = value;
        } 
 
        // DateTimeOffset
        public override void SetDateTimeOffset(SmiEventSink sink, int ordinal, DateTimeOffset value) { 
            _buffer[ordinal].DateTimeOffset = value;
        }

        // valid for SqlDbType.Variant 
        public override void SetVariantMetaData(SmiEventSink sink, int ordinal, SmiMetaData metaData) {
            _buffer[ordinal].VariantType = metaData; 
        } 
        #endregion
    } 
}

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

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