Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Data / System / Data / Common / SQLTypes / SQLInt32Storage.cs / 1 / SQLInt32Storage.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.Common { using System; using System.Xml; using System.Data.SqlTypes; using System.Diagnostics; using System.Globalization; using System.IO; using System.Xml.Serialization; using System.Collections; internal sealed class SqlInt32Storage : DataStorage { private SqlInt32[] values; public SqlInt32Storage(DataColumn column) : base(column, typeof(SqlInt32), SqlInt32.Null, SqlInt32.Null) { } override public Object Aggregate(int[] records, AggregateType kind) { bool hasData = false; try { switch (kind) { case AggregateType.Sum: SqlInt64 sum = 0; foreach (int record in records) { if (IsNull(record)) continue; checked { sum += values[record];} hasData = true; } if (hasData) { return sum; } return NullValue; case AggregateType.Mean: SqlInt64 meanSum = 0; int meanCount = 0; foreach (int record in records) { if (IsNull(record)) continue; checked { meanSum += (values[record]).ToSqlInt64();} meanCount++; hasData = true; } if (hasData) { SqlInt32 mean = 0; checked {mean = (meanSum / (SqlInt64) meanCount).ToSqlInt32();} return mean; } return NullValue; case AggregateType.Var: case AggregateType.StDev: int count = 0; SqlDouble var = (SqlDouble)0; SqlDouble prec = (SqlDouble)0; SqlDouble dsum = (SqlDouble)0; SqlDouble sqrsum = (SqlDouble)0; foreach (int record in records) { if (IsNull(record)) continue; dsum += (values[record]).ToSqlDouble(); sqrsum += (values[record]).ToSqlDouble() * (values[record]).ToSqlDouble(); count++; } if (count > 1) { var = ((SqlDouble)count * sqrsum - (dsum * dsum)); prec = var / (dsum * dsum); // we are dealing with the risk of a cancellation error // double is guaranteed only for 15 digits so a difference // with a result less than 1e-15 should be considered as zero if ((prec < 1e-15) || (var <0)) var = 0; else var = var / (count * (count -1)); if (kind == AggregateType.StDev) { return Math.Sqrt(var.Value); } return var; } return NullValue; case AggregateType.Min: SqlInt32 min = SqlInt32.MaxValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt32.LessThan(values[record], min)).IsTrue) min = values[record]; hasData = true; } if (hasData) { return min; } return NullValue; case AggregateType.Max: SqlInt32 max = SqlInt32.MinValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt32.GreaterThan(values[record], max)).IsTrue) max = values[record]; hasData = true; } if (hasData) { return max; } return NullValue; case AggregateType.First: if (records.Length > 0) { return values[records[0]]; } return null; case AggregateType.Count: count = 0; for (int i = 0; i < records.Length; i++) { if (!IsNull(records[i])) count++; } return count; } } catch (OverflowException) { throw ExprException.Overflow(typeof(SqlInt32)); } throw ExceptionBuilder.AggregateException(kind, DataType); } override public int Compare(int recordNo1, int recordNo2) { return values[recordNo1].CompareTo(values[recordNo2]); } override public int CompareValueTo(int recordNo, Object value) { return values[recordNo].CompareTo((SqlInt32)value); } override public object ConvertValue(object value) { if (null != value) { return SqlConvert.ConvertToSqlInt32(value); } return NullValue; } override public void Copy(int recordNo1, int recordNo2) { values[recordNo2] = values[recordNo1]; } override public Object Get(int record) { return values[record]; } override public bool IsNull(int record) { return (values[record].IsNull); } override public void Set(int record, Object value) { values[record] = SqlConvert.ConvertToSqlInt32(value); } override public void SetCapacity(int capacity) { SqlInt32[] newValues = new SqlInt32[capacity]; if (null != values) { Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); } values = newValues; } override public object ConvertXmlToObject(string s) { SqlInt32 newValue = new SqlInt32(); string tempStr =string.Concat("", s, ""); // this is done since you can give fragmet to reader, bug 98767 StringReader strReader = new StringReader(tempStr); IXmlSerializable tmp = newValue; using (XmlTextReader xmlTextReader = new XmlTextReader(strReader)) { tmp.ReadXml(xmlTextReader); } return ((SqlInt32)tmp); } override public string ConvertObjectToXml(object value) { Debug.Assert(!DataStorage.IsObjectNull(value), "we shouldn't have null here"); Debug.Assert((value.GetType() == typeof(SqlInt32)), "wrong input type"); StringWriter strwriter = new StringWriter(FormatProvider); using (XmlTextWriter xmlTextWriter = new XmlTextWriter (strwriter)) { ((IXmlSerializable)value).WriteXml(xmlTextWriter); } return (strwriter.ToString()); } override protected object GetEmptyStorage(int recordCount) { return new SqlInt32[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { SqlInt32[] typedStore = (SqlInt32[]) store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, IsNull(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (SqlInt32[]) store; //SetNullStorage(nullbits); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.Common { using System; using System.Xml; using System.Data.SqlTypes; using System.Diagnostics; using System.Globalization; using System.IO; using System.Xml.Serialization; using System.Collections; internal sealed class SqlInt32Storage : DataStorage { private SqlInt32[] values; public SqlInt32Storage(DataColumn column) : base(column, typeof(SqlInt32), SqlInt32.Null, SqlInt32.Null) { } override public Object Aggregate(int[] records, AggregateType kind) { bool hasData = false; try { switch (kind) { case AggregateType.Sum: SqlInt64 sum = 0; foreach (int record in records) { if (IsNull(record)) continue; checked { sum += values[record];} hasData = true; } if (hasData) { return sum; } return NullValue; case AggregateType.Mean: SqlInt64 meanSum = 0; int meanCount = 0; foreach (int record in records) { if (IsNull(record)) continue; checked { meanSum += (values[record]).ToSqlInt64();} meanCount++; hasData = true; } if (hasData) { SqlInt32 mean = 0; checked {mean = (meanSum / (SqlInt64) meanCount).ToSqlInt32();} return mean; } return NullValue; case AggregateType.Var: case AggregateType.StDev: int count = 0; SqlDouble var = (SqlDouble)0; SqlDouble prec = (SqlDouble)0; SqlDouble dsum = (SqlDouble)0; SqlDouble sqrsum = (SqlDouble)0; foreach (int record in records) { if (IsNull(record)) continue; dsum += (values[record]).ToSqlDouble(); sqrsum += (values[record]).ToSqlDouble() * (values[record]).ToSqlDouble(); count++; } if (count > 1) { var = ((SqlDouble)count * sqrsum - (dsum * dsum)); prec = var / (dsum * dsum); // we are dealing with the risk of a cancellation error // double is guaranteed only for 15 digits so a difference // with a result less than 1e-15 should be considered as zero if ((prec < 1e-15) || (var <0)) var = 0; else var = var / (count * (count -1)); if (kind == AggregateType.StDev) { return Math.Sqrt(var.Value); } return var; } return NullValue; case AggregateType.Min: SqlInt32 min = SqlInt32.MaxValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt32.LessThan(values[record], min)).IsTrue) min = values[record]; hasData = true; } if (hasData) { return min; } return NullValue; case AggregateType.Max: SqlInt32 max = SqlInt32.MinValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt32.GreaterThan(values[record], max)).IsTrue) max = values[record]; hasData = true; } if (hasData) { return max; } return NullValue; case AggregateType.First: if (records.Length > 0) { return values[records[0]]; } return null; case AggregateType.Count: count = 0; for (int i = 0; i < records.Length; i++) { if (!IsNull(records[i])) count++; } return count; } } catch (OverflowException) { throw ExprException.Overflow(typeof(SqlInt32)); } throw ExceptionBuilder.AggregateException(kind, DataType); } override public int Compare(int recordNo1, int recordNo2) { return values[recordNo1].CompareTo(values[recordNo2]); } override public int CompareValueTo(int recordNo, Object value) { return values[recordNo].CompareTo((SqlInt32)value); } override public object ConvertValue(object value) { if (null != value) { return SqlConvert.ConvertToSqlInt32(value); } return NullValue; } override public void Copy(int recordNo1, int recordNo2) { values[recordNo2] = values[recordNo1]; } override public Object Get(int record) { return values[record]; } override public bool IsNull(int record) { return (values[record].IsNull); } override public void Set(int record, Object value) { values[record] = SqlConvert.ConvertToSqlInt32(value); } override public void SetCapacity(int capacity) { SqlInt32[] newValues = new SqlInt32[capacity]; if (null != values) { Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); } values = newValues; } override public object ConvertXmlToObject(string s) { SqlInt32 newValue = new SqlInt32(); string tempStr =string.Concat("", s, ""); // this is done since you can give fragmet to reader, bug 98767 StringReader strReader = new StringReader(tempStr); IXmlSerializable tmp = newValue; using (XmlTextReader xmlTextReader = new XmlTextReader(strReader)) { tmp.ReadXml(xmlTextReader); } return ((SqlInt32)tmp); } override public string ConvertObjectToXml(object value) { Debug.Assert(!DataStorage.IsObjectNull(value), "we shouldn't have null here"); Debug.Assert((value.GetType() == typeof(SqlInt32)), "wrong input type"); StringWriter strwriter = new StringWriter(FormatProvider); using (XmlTextWriter xmlTextWriter = new XmlTextWriter (strwriter)) { ((IXmlSerializable)value).WriteXml(xmlTextWriter); } return (strwriter.ToString()); } override protected object GetEmptyStorage(int recordCount) { return new SqlInt32[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { SqlInt32[] typedStore = (SqlInt32[]) store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, IsNull(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (SqlInt32[]) store; //SetNullStorage(nullbits); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SchemaAttDef.cs
- TrackingExtract.cs
- MobileCapabilities.cs
- SqlRowUpdatingEvent.cs
- TimeoutValidationAttribute.cs
- FormCollection.cs
- BitmapInitialize.cs
- CombinedGeometry.cs
- XamlFilter.cs
- ChineseLunisolarCalendar.cs
- XmlUtil.cs
- DetailsViewUpdateEventArgs.cs
- DaylightTime.cs
- TextEmbeddedObject.cs
- NavigationPropertySingletonExpression.cs
- CRYPTPROTECT_PROMPTSTRUCT.cs
- Error.cs
- ActivityScheduledRecord.cs
- ComboBox.cs
- _ProxyRegBlob.cs
- SettingsPropertyValue.cs
- PasswordDeriveBytes.cs
- SmiRecordBuffer.cs
- StylusEventArgs.cs
- ToolTip.cs
- ContentPlaceHolder.cs
- ToolBarOverflowPanel.cs
- InternalControlCollection.cs
- ViewBase.cs
- SharingService.cs
- StrongNamePublicKeyBlob.cs
- TextOnlyOutput.cs
- SqlDataSourceCache.cs
- HybridWebProxyFinder.cs
- PathFigure.cs
- DataMemberListEditor.cs
- IPEndPoint.cs
- DoubleIndependentAnimationStorage.cs
- _FtpControlStream.cs
- Cursors.cs
- ClickablePoint.cs
- GridViewRowPresenter.cs
- DataAccessException.cs
- XsltLibrary.cs
- StrokeNodeEnumerator.cs
- ProfileServiceManager.cs
- DataTableClearEvent.cs
- ResourceExpressionEditorSheet.cs
- DNS.cs
- DataBindingExpressionBuilder.cs
- IsolatedStorage.cs
- ExternalException.cs
- MonthCalendar.cs
- _Semaphore.cs
- XmlCountingReader.cs
- AssemblyContextControlItem.cs
- LabelDesigner.cs
- DurableInstance.cs
- ImageMetadata.cs
- CheckableControlBaseAdapter.cs
- TextSelection.cs
- OdbcInfoMessageEvent.cs
- GenericTextProperties.cs
- SupportsEventValidationAttribute.cs
- ScopelessEnumAttribute.cs
- DataGridViewHeaderCell.cs
- UrlPath.cs
- BindingContext.cs
- MyContact.cs
- StartUpEventArgs.cs
- FileVersionInfo.cs
- MenuItemCollection.cs
- DataGridAutoFormat.cs
- StyleModeStack.cs
- ErrorStyle.cs
- WorkflowMessageEventHandler.cs
- DirectoryNotFoundException.cs
- PenContexts.cs
- Shape.cs
- NonClientArea.cs
- ToolStripRenderEventArgs.cs
- RecordConverter.cs
- HttpModulesSection.cs
- PassportAuthenticationModule.cs
- GridViewItemAutomationPeer.cs
- DebuggerAttributes.cs
- EncryptedPackageFilter.cs
- ToolStripArrowRenderEventArgs.cs
- ExtractedStateEntry.cs
- arc.cs
- Utils.cs
- RegisteredDisposeScript.cs
- WebBaseEventKeyComparer.cs
- ScrollData.cs
- MenuBase.cs
- RegexCompilationInfo.cs
- SafeLibraryHandle.cs
- Normalization.cs
- Journal.cs
- SubpageParaClient.cs