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/ 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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