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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 TimeSpanStorage : DataStorage
{
private static readonly TimeSpan s_defaultValue = TimeSpan.Zero;
private TimeSpan[] _values = default!; // Late-initialized
public TimeSpanStorage(DataColumn column)
: base(column, typeof(TimeSpan), s_defaultValue, StorageType.TimeSpan)
{
}
public override object Aggregate(int[] records, AggregateType kind)
{
bool hasData = false;
try
{
switch (kind)
{
case AggregateType.Min:
TimeSpan min = TimeSpan.MaxValue;
for (int i = 0; i < records.Length; i++)
{
int record = records[i];
if (IsNull(record))
continue;
min = (TimeSpan.Compare(_values[record], min) < 0) ? _values[record] : min;
hasData = true;
}
if (hasData)
{
return min;
}
return _nullValue;
case AggregateType.Max:
TimeSpan max = TimeSpan.MinValue;
for (int i = 0; i < records.Length; i++)
{
int record = records[i];
if (IsNull(record))
continue;
max = (TimeSpan.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:
return base.Aggregate(records, kind);
case AggregateType.Sum:
{
decimal sum = 0;
foreach (int record in records)
{
if (IsNull(record))
continue;
sum += _values[record].Ticks;
hasData = true;
}
if (hasData)
{
return TimeSpan.FromTicks((long)Math.Round(sum));
}
return null!; // TODO: This is incorrect, should be DBNull.Value
}
case AggregateType.Mean:
{
decimal meanSum = 0;
int meanCount = 0;
foreach (int record in records)
{
if (IsNull(record))
continue;
meanSum += _values[record].Ticks;
meanCount++;
}
if (meanCount > 0)
{
return TimeSpan.FromTicks((long)Math.Round(meanSum / meanCount));
}
return null!; // TODO: This is incorrect, should be DBNull.Value
}
case AggregateType.StDev:
{
int count = 0;
decimal meanSum = 0;
foreach (int record in records)
{
if (IsNull(record))
continue;
meanSum += _values[record].Ticks;
count++;
}
if (count > 1)
{
double varSum = 0;
decimal mean = meanSum / count;
foreach (int record in records)
{
if (IsNull(record))
continue;
double x = (double)(_values[record].Ticks - mean);
varSum += x * x;
}
ulong stDev = (ulong)Math.Round(Math.Sqrt(varSum / (count - 1)));
if (stDev > long.MaxValue)
{
stDev = long.MaxValue;
}
return TimeSpan.FromTicks((long)stDev);
}
return null!; // TODO: This is incorrect, should be DBNull.Value
}
}
}
catch (OverflowException)
{
throw ExprException.Overflow(typeof(TimeSpan));
}
throw ExceptionBuilder.AggregateException(kind, _dataType);
}
public override int Compare(int recordNo1, int recordNo2)
{
TimeSpan valueNo1 = _values[recordNo1];
TimeSpan valueNo2 = _values[recordNo2];
if (valueNo1 == s_defaultValue || valueNo2 == s_defaultValue)
{
int bitCheck = CompareBits(recordNo1, recordNo2);
if (0 != bitCheck)
return bitCheck;
}
return TimeSpan.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)
{
if (IsNull(recordNo))
{
return 0;
}
return 1;
}
TimeSpan valueNo1 = _values[recordNo];
if ((s_defaultValue == valueNo1) && IsNull(recordNo))
{
return -1;
}
return valueNo1.CompareTo((TimeSpan)value);
}
private static TimeSpan ConvertToTimeSpan(object value)
{
// Do not change these checks
Type typeofValue = value.GetType();
if (typeofValue == typeof(string))
{
return TimeSpan.Parse((string)value);
}
else if (typeofValue == typeof(int))
{
return new TimeSpan((int)value);
}
else if (typeofValue == typeof(long))
{
return new TimeSpan((long)value);
}
else
{
return (TimeSpan)value;
}
}
public override object ConvertValue(object? value)
{
if (_nullValue != value)
{
if (null != value)
{
value = ConvertToTimeSpan(value);
}
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)
{
TimeSpan value = _values[record];
if (value != s_defaultValue)
{
return value;
}
return GetBits(record);
}
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
{
_values[record] = ConvertToTimeSpan(value);
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)
{
return XmlConvert.ToTimeSpan(s);
}
[RequiresUnreferencedCode(DataSet.RequiresUnreferencedCodeMessage)]
[RequiresDynamicCode(DataSet.RequiresDynamicCodeMessage)]
public override string ConvertObjectToXml(object value)
{
return XmlConvert.ToString((TimeSpan)value);
}
protected override object GetEmptyStorage(int recordCount)
{
return new TimeSpan[recordCount];
}
protected override void CopyValue(int record, object store, BitArray nullbits, int storeIndex)
{
TimeSpan[] typedStore = (TimeSpan[])store;
typedStore[storeIndex] = _values[record];
nullbits.Set(storeIndex, IsNull(record));
}
protected override void SetStorage(object store, BitArray nullbits)
{
_values = (TimeSpan[])store;
SetNullStorage(nullbits);
}
}
}
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