mcs/class/referencesource/System.Data/System/Data/SqlClient/TdsParameterSetter.cs


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//------------------------------------------------------------------------------
// <copyright file="TdsParameterSetter.cs" company="Microsoft">
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------

namespace System.Data.SqlClient {
    using System;
    using System.Data;
    using System.Data.SqlTypes;
    using System.Diagnostics;

    using Microsoft.SqlServer.Server;

    // Simple Getter/Setter for structured parameters to allow using common ValueUtilsSmi code.
    //  This is a stand-in to having a true SmiRequestExecutor class for TDS.
    internal class TdsParameterSetter : SmiTypedGetterSetter {

        #region Private fields

        private TdsRecordBufferSetter _target;

        #endregion

        #region ctor & control

        internal TdsParameterSetter(TdsParserStateObject stateObj, SmiMetaData md) {
            _target = new TdsRecordBufferSetter(stateObj, md);
        }

        #endregion

        #region TypedGetterSetter overrides
        // Are calls to Get methods allowed?
        internal override bool CanGet {
            get {
                return false;
            }
        }

        // Are calls to Set methods allowed?
        internal override bool CanSet {
            get {
                return true;
            }
        }

        // valid for structured types
        //  This method called for both get and set.
        internal override SmiTypedGetterSetter GetTypedGetterSetter(SmiEventSink sink, int ordinal) {
            Debug.Assert(0==ordinal, "TdsParameterSetter only supports 0 for ordinal.  Actual = " + ordinal);
            return _target;
        }

        // Set value to null
        //  valid for all types
        public override void SetDBNull(SmiEventSink sink, int ordinal) {
            Debug.Assert(0==ordinal, "TdsParameterSetter only supports 0 for ordinal.  Actual = " + ordinal);

            _target.EndElements(sink);
        }

        #endregion
    }
}