Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / Common / BooleanStorage.cs / 1 / BooleanStorage.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.Common { using System; using System.Xml; using System.Data.SqlTypes; using System.Collections; internal sealed class BooleanStorage : DataStorage { private const Boolean defaultValue = false; private Boolean[] values; internal BooleanStorage(DataColumn column) : base(column, typeof(Boolean), defaultValue) { } override public Object Aggregate(int[] records, AggregateType kind) { bool hasData = false; try { switch (kind) { case AggregateType.Min: Boolean min = true; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; min=values[record] && min; hasData = true; } if (hasData) { return min; } return NullValue; case AggregateType.Max: Boolean max = false; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; max=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: return base.Aggregate(records, kind); } } catch (OverflowException) { throw ExprException.Overflow(typeof(Boolean)); } throw ExceptionBuilder.AggregateException(kind, DataType); } override public int Compare(int recordNo1, int recordNo2) { Boolean valueNo1 = values[recordNo1]; Boolean valueNo2 = values[recordNo2]; if (valueNo1 == defaultValue || valueNo2 == defaultValue) { int bitCheck = CompareBits(recordNo1, recordNo2); if (0 != bitCheck) return bitCheck; } return valueNo1.CompareTo(valueNo2); //return ((valueNo1 == valueNo2) ? 0 : ((false == valueNo1) ? -1 : 1)); // similar to Boolean.CompareTo(Boolean) } 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; } Boolean valueNo1 = values[recordNo]; if ((defaultValue == valueNo1) && IsNull(recordNo)) { return -1; } return valueNo1.CompareTo((Boolean)value); //return ((valueNo1 == valueNo2) ? 0 : ((false == valueNo1) ? -1 : 1)); // similar to Boolean.CompareTo(Boolean) } public override object ConvertValue(object value) { if (NullValue != value) { if (null != value) { value = ((IConvertible)value).ToBoolean(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) { Boolean value = values[record]; if (value != defaultValue) { return value; } return GetBits(record); } 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 { values[record] = ((IConvertible)value).ToBoolean(FormatProvider); SetNullBit(record, false); } } override public void SetCapacity(int capacity) { Boolean[] newValues = new Boolean[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) { return XmlConvert.ToBoolean(s); } override public string ConvertObjectToXml(object value) { return XmlConvert.ToString((Boolean) value); } override protected object GetEmptyStorage(int recordCount) { return new Boolean[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { Boolean[] typedStore = (Boolean[]) store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, IsNull(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (Boolean[]) store; SetNullStorage(nullbits); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CodeMemberEvent.cs
- CompilationUtil.cs
- IriParsingElement.cs
- StylusCollection.cs
- SqlProfileProvider.cs
- DSACryptoServiceProvider.cs
- WaitHandle.cs
- SplineQuaternionKeyFrame.cs
- controlskin.cs
- HasCopySemanticsAttribute.cs
- Brush.cs
- XmlEntityReference.cs
- EntityDesignerUtils.cs
- SystemIcmpV6Statistics.cs
- SizeChangedEventArgs.cs
- OutOfMemoryException.cs
- MessageBox.cs
- ByeOperationCD1AsyncResult.cs
- DbProviderFactory.cs
- NamespaceEmitter.cs
- DisableDpiAwarenessAttribute.cs
- RelatedPropertyManager.cs
- ParenthesizePropertyNameAttribute.cs
- TlsSspiNegotiation.cs
- PaintEvent.cs
- ForeignKeyConstraint.cs
- DefaultPropertyAttribute.cs
- SQLDateTimeStorage.cs
- DateTimeSerializationSection.cs
- MatcherBuilder.cs
- HealthMonitoringSectionHelper.cs
- TraceSwitch.cs
- XPathNodeHelper.cs
- EntityChangedParams.cs
- Classification.cs
- ColorDialog.cs
- WebPartsPersonalization.cs
- BridgeDataReader.cs
- SignatureToken.cs
- WindowsSysHeader.cs
- DesignerResources.cs
- SHA256CryptoServiceProvider.cs
- KeyConverter.cs
- Matrix.cs
- ByteConverter.cs
- CodeCommentStatementCollection.cs
- RC2.cs
- Function.cs
- AsymmetricAlgorithm.cs
- ToolBarPanel.cs
- WindowsListViewItem.cs
- Validator.cs
- PerformanceCounterLib.cs
- MatrixTransform3D.cs
- FormsAuthenticationModule.cs
- CommentEmitter.cs
- KeyboardNavigation.cs
- PairComparer.cs
- FixedHighlight.cs
- SystemIPAddressInformation.cs
- HtmlTableRowCollection.cs
- SkewTransform.cs
- CreateUserWizard.cs
- AlignmentXValidation.cs
- OutputScope.cs
- ApplicationSecurityInfo.cs
- HyperLink.cs
- WebPartDisplayModeCancelEventArgs.cs
- _AcceptOverlappedAsyncResult.cs
- GifBitmapDecoder.cs
- XmlUrlResolver.cs
- BinHexEncoding.cs
- FontCacheLogic.cs
- ObjectStateEntryOriginalDbUpdatableDataRecord.cs
- PageParserFilter.cs
- RegisteredArrayDeclaration.cs
- EditorPartDesigner.cs
- UserPreferenceChangingEventArgs.cs
- SQLStringStorage.cs
- ReferenceCountedObject.cs
- WindowPattern.cs
- ClientData.cs
- WindowShowOrOpenTracker.cs
- WindowsGrip.cs
- SimpleType.cs
- OutputCache.cs
- StoreItemCollection.cs
- PhotoPrintingIntent.cs
- PlainXmlDeserializer.cs
- GenericTextProperties.cs
- Vector.cs
- ImplicitInputBrush.cs
- MasterPage.cs
- TableNameAttribute.cs
- DiscardableAttribute.cs
- AssemblyAttributesGoHere.cs
- URLMembershipCondition.cs
- EndpointNotFoundException.cs
- IgnorePropertiesAttribute.cs
- ApplicationInterop.cs