Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Data / System / Data / Common / SQLTypes / SQLInt16Storage.cs / 1 / SQLInt16Storage.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 SqlInt16Storage : DataStorage { private SqlInt16[] values; public SqlInt16Storage(DataColumn column) : base(column, typeof(SqlInt16), SqlInt16.Null, SqlInt16.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) { SqlInt16 mean = 0; checked {mean = (meanSum /(SqlInt64) meanCount).ToSqlInt16();} 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: SqlInt16 min = SqlInt16.MaxValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt16.LessThan(values[record], min)).IsTrue) min = values[record]; hasData = true; } if (hasData) { return min; } return NullValue; case AggregateType.Max: SqlInt16 max = SqlInt16.MinValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt16.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;// no data => 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(SqlInt16)); } 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((SqlInt16)value); } override public object ConvertValue(object value) { if (null != value) { return SqlConvert.ConvertToSqlInt16(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.ConvertToSqlInt16( value); } override public void SetCapacity(int capacity) { SqlInt16[] newValues = new SqlInt16[capacity]; if (null != values) { Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); } values = newValues; } override public object ConvertXmlToObject(string s) { SqlInt16 newValue = new SqlInt16(); 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 ((SqlInt16)tmp); } override public string ConvertObjectToXml(object value) { Debug.Assert(!DataStorage.IsObjectNull(value), "we shouldn't have null here"); Debug.Assert((value.GetType() == typeof(SqlInt16)), "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 SqlInt16[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { SqlInt16[] typedStore = (SqlInt16[]) store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, IsNull(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (SqlInt16[]) 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 SqlInt16Storage : DataStorage { private SqlInt16[] values; public SqlInt16Storage(DataColumn column) : base(column, typeof(SqlInt16), SqlInt16.Null, SqlInt16.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) { SqlInt16 mean = 0; checked {mean = (meanSum /(SqlInt64) meanCount).ToSqlInt16();} 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: SqlInt16 min = SqlInt16.MaxValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt16.LessThan(values[record], min)).IsTrue) min = values[record]; hasData = true; } if (hasData) { return min; } return NullValue; case AggregateType.Max: SqlInt16 max = SqlInt16.MinValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt16.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;// no data => 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(SqlInt16)); } 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((SqlInt16)value); } override public object ConvertValue(object value) { if (null != value) { return SqlConvert.ConvertToSqlInt16(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.ConvertToSqlInt16( value); } override public void SetCapacity(int capacity) { SqlInt16[] newValues = new SqlInt16[capacity]; if (null != values) { Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); } values = newValues; } override public object ConvertXmlToObject(string s) { SqlInt16 newValue = new SqlInt16(); 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 ((SqlInt16)tmp); } override public string ConvertObjectToXml(object value) { Debug.Assert(!DataStorage.IsObjectNull(value), "we shouldn't have null here"); Debug.Assert((value.GetType() == typeof(SqlInt16)), "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 SqlInt16[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { SqlInt16[] typedStore = (SqlInt16[]) store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, IsNull(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (SqlInt16[]) 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
- ElementNotEnabledException.cs
- TextSpan.cs
- WebPartConnectionsCancelVerb.cs
- FontConverter.cs
- FileAuthorizationModule.cs
- LiteralDesigner.cs
- ExpressionReplacer.cs
- TimeoutHelper.cs
- DesignerInterfaces.cs
- CertificateManager.cs
- CatalogZoneAutoFormat.cs
- AudioFormatConverter.cs
- DbConnectionPoolIdentity.cs
- ExtensionSimplifierMarkupObject.cs
- TableLayoutStyleCollection.cs
- ContainerControlDesigner.cs
- Visitor.cs
- Normalization.cs
- VirtualDirectoryMappingCollection.cs
- DataSetMappper.cs
- InkSerializer.cs
- SubclassTypeValidatorAttribute.cs
- BasicDesignerLoader.cs
- ArrangedElementCollection.cs
- HttpApplicationFactory.cs
- SqlWebEventProvider.cs
- MessageBox.cs
- loginstatus.cs
- UMPAttributes.cs
- Panel.cs
- CharUnicodeInfo.cs
- ModifierKeysValueSerializer.cs
- MetadataUtil.cs
- TypeValidationEventArgs.cs
- LocalFileSettingsProvider.cs
- SectionInformation.cs
- StrongName.cs
- FileReservationCollection.cs
- TextServicesManager.cs
- SettingsPropertyNotFoundException.cs
- Perspective.cs
- ScrollViewerAutomationPeer.cs
- CommandField.cs
- SolidColorBrush.cs
- Vector.cs
- IntMinMaxAggregationOperator.cs
- ClientFactory.cs
- EntityAdapter.cs
- safePerfProviderHandle.cs
- ResourceSet.cs
- Monitor.cs
- ProfilePropertySettingsCollection.cs
- XmlChildNodes.cs
- HwndSubclass.cs
- Matrix3D.cs
- WebControlParameterProxy.cs
- CodeTypeDeclaration.cs
- DataDocumentXPathNavigator.cs
- Condition.cs
- WebMessageEncodingBindingElement.cs
- XPathParser.cs
- BeginGetFileNameFromUserRequest.cs
- DefaultValueTypeConverter.cs
- PropertySourceInfo.cs
- RectAnimationClockResource.cs
- DataSourceProvider.cs
- HtmlHead.cs
- DocumentOrderComparer.cs
- XmlSubtreeReader.cs
- IssuanceLicense.cs
- TextModifierScope.cs
- PDBReader.cs
- ImmutableObjectAttribute.cs
- RuntimeWrappedException.cs
- ResponseStream.cs
- SchemaImporterExtensionsSection.cs
- SecurityUtils.cs
- Tracking.cs
- RestHandlerFactory.cs
- PipelineComponent.cs
- ToolStripOverflow.cs
- CompressStream.cs
- CompiledAction.cs
- shaper.cs
- TabPage.cs
- DebugView.cs
- WebRequest.cs
- ColumnTypeConverter.cs
- Config.cs
- DPTypeDescriptorContext.cs
- GetLastErrorDetailsRequest.cs
- Span.cs
- XmlName.cs
- RawStylusActions.cs
- TemplateManager.cs
- NegationPusher.cs
- ExpressionContext.cs
- ContainerActivationHelper.cs
- StringValueSerializer.cs
- Registry.cs