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//------------------------------------------------------------------------------
// <copyright file="DateTimeStorage.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
// <owner current="false" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Data.Common {
using System;
using System.Xml;
using System.Data.SqlTypes;
using System.Collections;
internal sealed class DateTimeStorage : DataStorage {
private static readonly DateTime defaultValue = DateTime.MinValue;
private DateTime[] values;
internal DateTimeStorage(DataColumn column)
: base(column, typeof(DateTime), defaultValue, StorageType.DateTime) {
}
override public 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:
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);
}
override public int Compare(int recordNo1, int recordNo2) {
DateTime valueNo1 = values[recordNo1];
DateTime valueNo2 = values[recordNo2];
if (valueNo1 == defaultValue || valueNo2 == 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 ((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;
}
override public void Copy(int recordNo1, int recordNo2) {
CopyBits(recordNo1, recordNo2);
values[recordNo2] = values[recordNo1];
}
override public Object Get(int record) {
// SQLBU 408233: two equal DateTime with different .Kind are equal
DateTime 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 {
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);
}
}
override public void SetCapacity(int capacity) {
DateTime[] newValues = new DateTime[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) {
object retValue;
if (DateTimeMode == DataSetDateTime.UnspecifiedLocal) {
retValue = XmlConvert.ToDateTime(s, XmlDateTimeSerializationMode.Unspecified);
}
else {
retValue = XmlConvert.ToDateTime(s, XmlDateTimeSerializationMode.RoundtripKind);
}
return retValue;
}
override public 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;
}
override protected object GetEmptyStorage(int recordCount) {
return new DateTime[recordCount];
}
override protected 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);
}
override protected 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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