Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / 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
- ListControlStringCollectionEditor.cs
- UxThemeWrapper.cs
- ThemeDictionaryExtension.cs
- ProfileService.cs
- validationstate.cs
- webbrowsersite.cs
- DataColumnCollection.cs
- FieldNameLookup.cs
- CorrelationResolver.cs
- DataGridColumnCollection.cs
- ScriptDescriptor.cs
- ListViewInsertEventArgs.cs
- RtType.cs
- DesignUtil.cs
- HttpGetServerProtocol.cs
- sqlpipe.cs
- CheckBoxStandardAdapter.cs
- CacheEntry.cs
- CheckBoxField.cs
- Bitmap.cs
- CacheMode.cs
- SqlDataSourceQuery.cs
- FileUtil.cs
- PerformanceCounterManager.cs
- TextEditorThreadLocalStore.cs
- SchemaHelper.cs
- FormViewUpdatedEventArgs.cs
- StateManagedCollection.cs
- AssemblyCollection.cs
- ViewCellSlot.cs
- TemplateParser.cs
- TextPointerBase.cs
- GroupBox.cs
- TemplateKey.cs
- Predicate.cs
- DocumentOrderComparer.cs
- SqlWebEventProvider.cs
- RectIndependentAnimationStorage.cs
- AuthenticationSection.cs
- ObjectAssociationEndMapping.cs
- _ProxyChain.cs
- ValidationPropertyAttribute.cs
- Cursors.cs
- HtmlString.cs
- SharedPerformanceCounter.cs
- ValidationSummary.cs
- OrderedDictionary.cs
- CharacterMetricsDictionary.cs
- WindowsListViewItem.cs
- BitmapEffectInput.cs
- InvokeMethodDesigner.xaml.cs
- ClientApiGenerator.cs
- DerivedKeyCachingSecurityTokenSerializer.cs
- ProjectionPlan.cs
- ReturnType.cs
- SignatureResourcePool.cs
- SetStateDesigner.cs
- ClientFormsIdentity.cs
- SerialPinChanges.cs
- GlyphRun.cs
- CustomErrorCollection.cs
- SecUtil.cs
- ConfigurationCollectionAttribute.cs
- SafeBitVector32.cs
- IMembershipProvider.cs
- PrinterUnitConvert.cs
- SqlDataReader.cs
- IdnMapping.cs
- FilePresentation.cs
- Attributes.cs
- ObjectToken.cs
- AddInProcess.cs
- UnauthorizedWebPart.cs
- PathGradientBrush.cs
- StringKeyFrameCollection.cs
- FrugalMap.cs
- TCPClient.cs
- LoadItemsEventArgs.cs
- UIHelper.cs
- DataTable.cs
- RelationshipEndMember.cs
- BufferedGraphicsContext.cs
- CompositeControl.cs
- PointAnimation.cs
- BoolExpressionVisitors.cs
- WebPartCatalogAddVerb.cs
- PhysicalFontFamily.cs
- AsyncInvokeContext.cs
- DSASignatureDeformatter.cs
- MetadataItem.cs
- MemberPath.cs
- ExtensionDataObject.cs
- BoolExpressionVisitors.cs
- IPipelineRuntime.cs
- DocobjHost.cs
- _NetworkingPerfCounters.cs
- LocalIdKeyIdentifierClause.cs
- ManipulationLogic.cs
- CssTextWriter.cs
- TextElementEnumerator.cs