SqlXmlStorage.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 / System / Data / Common / SQLTypes / SqlXmlStorage.cs / 1 / SqlXmlStorage.cs
                        

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

namespace System.Data.Common { 
    using System;
    using System.Xml;
    using System.IO;
    using System.Xml.Serialization; 
    using System.Data.SqlTypes;
    using System.Diagnostics; 
    using System.Text; 
    using System.Collections;
    internal sealed class SqlXmlStorage : DataStorage { 

        private SqlXml[] values;

        public SqlXmlStorage(DataColumn column) 
        : base(column, typeof(SqlXml), SqlXml.Null, SqlXml.Null) {
        } 
 
        override public Object Aggregate(int[] records, AggregateType kind) {
            try { 
                switch (kind) {
                    case AggregateType.First:
                        if (records.Length > 0) {
                            return values[records[0]]; 
                        }
                        return null;// no data => null 
 
                    case AggregateType.Count:
                        int count = 0; 
                        for (int i = 0; i < records.Length; i++) {
                            if (!IsNull(records[i]))
                                count++;
                        } 
                        return count;
                } 
            } 
            catch (OverflowException) {
                throw ExprException.Overflow(typeof(SqlXml)); 
            }
            throw ExceptionBuilder.AggregateException(kind, DataType);
        }
 
        override public int Compare(int recordNo1, int recordNo2) {
            //return values[recordNo1].CompareTo(values[recordNo2]); 
            return 0; 
        }
 
        override public int CompareValueTo(int recordNo, Object value) {
            // SqlXml valueNo2 = ((value == null)||(value == DBNull.Value))? SqlXml.Null : (SqlXml)value;
            // return values[recordNo].CompareTo(valueNo2);
            return 0; 
        }
 
        override public void Copy(int recordNo1, int recordNo2) { 
            values[recordNo2] = values[recordNo1];
        } 

        override public Object Get(int record) {
            return values[record];
        } 

        override public bool IsNull(int record) { 
            return (values[record].IsNull); 
        }
 
        override public void Set(int record, Object value) {
            if ((value ==  DBNull.Value) || (value == null)){
                values[record] = SqlXml.Null;
            } 
            else {
                values[record] = (SqlXml)value; 
            } 
        }
 
        override public void SetCapacity(int capacity) {
            SqlXml[] newValues = new SqlXml[capacity];
            if (null != values) {
                Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); 
            }
            values = newValues; 
        } 

        override public object ConvertXmlToObject(string s) { 
            XmlTextReader reader =  new XmlTextReader(s, XmlNodeType.Element, null) ;
            return (new SqlXml(reader));

 
/*            SqlXml newValue = new SqlXml();
 
            StringReader strReader = new  StringReader(s); 
            XmlTextReader xmlTextReader = new XmlTextReader(strReader);
            ((IXmlSerializable)newValue).ReadXml(xmlTextReader); 
            xmlTextReader.Close();
            return newValue;
*/
        } 

        override public string ConvertObjectToXml(object value) { 
            SqlXml reader = (SqlXml) value; 
            if (reader.IsNull)
                return ADP.StrEmpty; 
            else
                return reader.Value;        // SqlXml.Value returns string

        } 

        override protected object GetEmptyStorage(int recordCount) { 
            return new SqlXml[recordCount]; 
        }
 
        override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) {
            SqlXml[] typedStore = (SqlXml[]) store;
            typedStore[storeIndex] = values[record];
            nullbits.Set(storeIndex, IsNull(record)); 
        }
 
        override protected void SetStorage(object store, BitArray nullbits) { 
            values = (SqlXml[]) store;
            //SetNullStorage(nullbits); 
        }
    }
}

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

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