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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections;
using System.Diagnostics.CodeAnalysis;
using System.Xml;
namespace System.Data.Common
{
internal sealed class DateTimeStorage : DataStorage
{
private static readonly DateTime s_defaultValue = DateTime.MinValue;
private DateTime[] _values = default!; // Late-initialized
internal DateTimeStorage(DataColumn column)
: base(column, typeof(DateTime), s_defaultValue, StorageType.DateTime)
{
}
public override object Aggregate(int[] records, AggregateType kind)
{
bool hasData = false;
try
{
switch (kind)
{
case AggregateType.Min:
DateTime min = DateTime.MaxValue;
for (int i = 0; i < records.Length; i++)
{
int record = records[i];
if (HasValue(record))
{
min = (DateTime.Compare(_values[record], min) < 0) ? _values[record] : min;
hasData = true;
}
}
if (hasData)
{
return min;
}
return _nullValue;
case AggregateType.Max:
DateTime max = DateTime.MinValue;
for (int i = 0; i < records.Length; i++)
{
int record = records[i];
if (HasValue(record))
{
max = (DateTime.Compare(_values[record], max) >= 0) ? _values[record] : max;
hasData = true;
}
}
if (hasData)
{
return max;
}
return _nullValue;
case AggregateType.First: // Does not seem to be implemented
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(DateTime));
}
throw ExceptionBuilder.AggregateException(kind, _dataType);
}
public override int Compare(int recordNo1, int recordNo2)
{
DateTime valueNo1 = _values[recordNo1];
DateTime valueNo2 = _values[recordNo2];
if (valueNo1 == s_defaultValue || valueNo2 == s_defaultValue)
{
int bitCheck = CompareBits(recordNo1, recordNo2);
if (0 != bitCheck)
{
return bitCheck;
}
}
return DateTime.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);
}
DateTime valueNo1 = _values[recordNo];
if ((s_defaultValue == valueNo1) && !HasValue(recordNo))
{
return -1;
}
return DateTime.Compare(valueNo1, (DateTime)value);
}
public override object ConvertValue(object? value)
{
if (_nullValue != value)
{
if (null != value)
{
value = ((IConvertible)value).ToDateTime(FormatProvider);
}
else
{
value = _nullValue;
}
}
return value;
}
public override void Copy(int recordNo1, int recordNo2)
{
CopyBits(recordNo1, recordNo2);
_values[recordNo2] = _values[recordNo1];
}
public override object Get(int record)
{
DateTime value = _values[record];
if ((value != s_defaultValue) || HasValue(record))
{
return value;
}
return _nullValue;
}
public override void Set(int record, object value)
{
System.Diagnostics.Debug.Assert(null != value, "null value");
if (_nullValue == value)
{
_values[record] = s_defaultValue;
SetNullBit(record, true);
}
else
{
DateTime retVal;
DateTime tmpValue = ((IConvertible)value).ToDateTime(FormatProvider);
switch (DateTimeMode)
{
case DataSetDateTime.Utc:
if (tmpValue.Kind == DateTimeKind.Utc)
{
retVal = tmpValue;
}
else if (tmpValue.Kind == DateTimeKind.Local)
{
retVal = tmpValue.ToUniversalTime();
}
else
{
retVal = DateTime.SpecifyKind(tmpValue, DateTimeKind.Utc);
}
break;
case DataSetDateTime.Local:
if (tmpValue.Kind == DateTimeKind.Local)
{
retVal = tmpValue;
}
else if (tmpValue.Kind == DateTimeKind.Utc)
{
retVal = tmpValue.ToLocalTime();
}
else
{
retVal = DateTime.SpecifyKind(tmpValue, DateTimeKind.Local);
}
break;
case DataSetDateTime.Unspecified:
case DataSetDateTime.UnspecifiedLocal:
retVal = DateTime.SpecifyKind(tmpValue, DateTimeKind.Unspecified);
break;
default:
throw ExceptionBuilder.InvalidDateTimeMode(DateTimeMode);
}
_values[record] = retVal;
SetNullBit(record, false);
}
}
public override void SetCapacity(int capacity)
{
Array.Resize(ref _values, capacity);
base.SetCapacity(capacity);
}
[RequiresUnreferencedCode(DataSet.RequiresUnreferencedCodeMessage)]
[RequiresDynamicCode(DataSet.RequiresDynamicCodeMessage)]
public override object ConvertXmlToObject(string s)
{
object retValue;
if (DateTimeMode == DataSetDateTime.UnspecifiedLocal)
{
retValue = XmlConvert.ToDateTime(s, XmlDateTimeSerializationMode.Unspecified);
}
else
{
retValue = XmlConvert.ToDateTime(s, XmlDateTimeSerializationMode.RoundtripKind);
}
return retValue;
}
[RequiresUnreferencedCode(DataSet.RequiresUnreferencedCodeMessage)]
[RequiresDynamicCode(DataSet.RequiresDynamicCodeMessage)]
public override string ConvertObjectToXml(object value)
{
string retValue;
if (DateTimeMode == DataSetDateTime.UnspecifiedLocal)
{
retValue = XmlConvert.ToString((DateTime)value, XmlDateTimeSerializationMode.Local);
}
else
{
retValue = XmlConvert.ToString((DateTime)value, XmlDateTimeSerializationMode.RoundtripKind);
}
return retValue;
}
protected override object GetEmptyStorage(int recordCount)
{
return new DateTime[recordCount];
}
protected override void CopyValue(int record, object store, BitArray nullbits, int storeIndex)
{
DateTime[] typedStore = (DateTime[])store;
bool isnull = !HasValue(record);
if (isnull || (0 == (DateTimeMode & DataSetDateTime.Local)))
{
typedStore[storeIndex] = _values[record]; // already universal time
}
else
{
typedStore[storeIndex] = _values[record].ToUniversalTime();
}
nullbits.Set(storeIndex, isnull);
}
protected override void SetStorage(object store, BitArray nullbits)
{
_values = (DateTime[])store;
SetNullStorage(nullbits);
if (DateTimeMode == DataSetDateTime.UnspecifiedLocal)
{
for (int i = 0; i < _values.Length; i++)
{
if (HasValue(i))
{
_values[i] = DateTime.SpecifyKind(_values[i].ToLocalTime(), DateTimeKind.Unspecified); //Strip the kind for UnspecifiedLocal.
}
}
}
else if (DateTimeMode == DataSetDateTime.Local)
{
for (int i = 0; i < _values.Length; i++)
{
if (HasValue(i))
{
_values[i] = _values[i].ToLocalTime();
}
}
}
}
}
}
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