DateTimeOffsetStorage.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / Common / DateTimeOffsetStorage.cs / 1305376 / DateTimeOffsetStorage.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
//----------------------------------------------------------------------------- 
 
namespace System.Data.Common {
    using System; 
    using System.Xml;
    using System.Data.SqlTypes;
    using System.Collections;
 
    internal sealed class DateTimeOffsetStorage : DataStorage {
 
        private static readonly DateTimeOffset defaultValue = DateTimeOffset.MinValue; 

        private DateTimeOffset[] values; 

        internal DateTimeOffsetStorage(DataColumn column)
        : base(column, typeof(DateTimeOffset), defaultValue) {
        } 

        override public Object Aggregate(int[] records, AggregateType kind) { 
            bool hasData = false; 
            try {
                switch (kind) { 
                    case AggregateType.Min:
                        DateTimeOffset min = DateTimeOffset.MaxValue;
                        for (int i = 0; i < records.Length; i++) {
                            int record = records[i]; 
                            if (HasValue(record)) {
                                min=(DateTimeOffset.Compare(values[record],min) < 0) ? values[record] : min; 
                                hasData = true; 
                            }
                        } 
                        if (hasData) {
                            return min;
                        }
                        return NullValue; 

                    case AggregateType.Max: 
                        DateTimeOffset max = DateTimeOffset.MinValue; 
                        for (int i = 0; i < records.Length; i++) {
                            int record = records[i]; 
                            if (HasValue(record)) {
                                max=(DateTimeOffset.Compare(values[record],max) >= 0) ? values[record] : max;
                                hasData = true;
                            } 
                        }
                        if (hasData) { 
                            return max; 
                        }
                        return NullValue; 

                    case AggregateType.First:
                        if (records.Length > 0) {
                            return values[records[0]]; 
                        }
                        return null; 
 
                    case AggregateType.Count:
                        int count = 0; 
                        for (int i = 0; i < records.Length; i++) {
                            if (HasValue(records[i])) {
                                count++;
                            } 
                        }
                        return count; 
                } 
            }
            catch (OverflowException) { 
                throw ExprException.Overflow(typeof(DateTimeOffset));
            }
            throw ExceptionBuilder.AggregateException(kind, DataType);
        } 

        override public int Compare(int recordNo1, int recordNo2) { 
            DateTimeOffset valueNo1 = values[recordNo1]; 
            DateTimeOffset valueNo2 = values[recordNo2];
 
            if (valueNo1 == defaultValue || valueNo2 == defaultValue) {
                int bitCheck = CompareBits(recordNo1, recordNo2);
                if (0 != bitCheck) {
                    return bitCheck; 
                }
            } 
            return DateTimeOffset.Compare(valueNo1, valueNo2); 
        }
 
        public override int CompareValueTo(int recordNo, object value) {
            System.Diagnostics.Debug.Assert(0 <= recordNo, "Invalid record");
            System.Diagnostics.Debug.Assert(null != value, "null value");
 
            if (NullValue == value) {
                return (HasValue(recordNo) ? 1 : 0); 
            } 

            DateTimeOffset valueNo1 = values[recordNo]; 
            if ((defaultValue == valueNo1) && !HasValue(recordNo)) {
                return -1;
            }
            return DateTimeOffset.Compare(valueNo1, (DateTimeOffset)value); 
        }
 
        public override object ConvertValue(object value) { 
            if (NullValue != value) {
                if (null != value) { 
                    value = ((DateTimeOffset)value);
                }
                else {
                    value = NullValue; 
                }
            } 
            return value; 
        }
 
        override public void Copy(int recordNo1, int recordNo2) {
            CopyBits(recordNo1, recordNo2);
            values[recordNo2] = values[recordNo1];
        } 

        override public Object Get(int record) { 
            DateTimeOffset value = values[record]; 
            if ((value != defaultValue) || HasValue(record)) {
                return value; 
            }
            return NullValue;
        }
 
        override public void Set(int record, Object value) {
            System.Diagnostics.Debug.Assert(null != value, "null value"); 
            if (NullValue == value) { 
                values[record] = defaultValue;
                SetNullBit(record, true); 
            }
            else {
                values[record] = (DateTimeOffset)value;
                SetNullBit(record, false); 
            }
        } 
 
        override public void SetCapacity(int capacity) {
            DateTimeOffset[] newValues = new DateTimeOffset[capacity]; 
            if (null != values) {
                Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length));
            }
            values = newValues; 
            base.SetCapacity(capacity);
        } 
 
        override public object ConvertXmlToObject(string s) {
            return XmlConvert.ToDateTimeOffset(s); 
        }

        override public string ConvertObjectToXml(object value) {
            return XmlConvert.ToString((DateTimeOffset)value); 
        }
 
        override protected object GetEmptyStorage(int recordCount) { 
            return new DateTimeOffset[recordCount];
        } 

        override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) {
            DateTimeOffset[] typedStore = (DateTimeOffset[]) store;
            typedStore[storeIndex] = values[record]; 
            nullbits.Set(storeIndex, !HasValue(record));
        } 
 
        override protected void SetStorage(object store, BitArray nullbits) {
            values = (DateTimeOffset[]) store; 
            SetNullStorage(nullbits);
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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DateTimeOffsetStorage.cs source code in C# .NET

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