Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / Filter / UnaryNode.cs / 1305376 / UnaryNode.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data { using System; using System.Collections.Generic; using System.Diagnostics; using System.Data.Common; using System.Data.SqlTypes; internal sealed class UnaryNode : ExpressionNode { internal readonly int op; internal ExpressionNode right; internal UnaryNode(DataTable table, int op, ExpressionNode right) : base(table) { this.op = op; this.right = right; } internal override void Bind(DataTable table, Listlist) { BindTable(table); right.Bind(table, list); } internal override object Eval() { return Eval(null, DataRowVersion.Default); } internal override object Eval(DataRow row, DataRowVersion version) { return EvalUnaryOp(op, right.Eval(row, version)); } internal override object Eval(int[] recordNos) { return right.Eval(recordNos); } private object EvalUnaryOp(int op, object vl) { object value = DBNull.Value; if (DataExpression.IsUnknown(vl)) return DBNull.Value; StorageType storageType; switch (op) { case Operators.Noop: return vl; case Operators.UnaryPlus: storageType = DataStorage.GetStorageType(vl.GetType()); if (ExpressionNode.IsNumericSql(storageType)) { return vl; } throw ExprException.TypeMismatch(this.ToString()); case Operators.Negative: // the have to be better way for doing this.. storageType = DataStorage.GetStorageType(vl.GetType()); if (ExpressionNode.IsNumericSql(storageType)) { switch(storageType) { case StorageType.Byte: value = -(Byte) vl; break; case StorageType.Int16: value = -(Int16) vl; break; case StorageType.Int32: value = -(Int32) vl; break; case StorageType.Int64: value = -(Int64) vl; break; case StorageType.Single: value = -(Single) vl; break; case StorageType.Double: value = -(Double) vl; break; case StorageType.Decimal: value = -(Decimal) vl; break; case StorageType.SqlDecimal: value = -(SqlDecimal) vl; break; case StorageType.SqlDouble: value = -(SqlDouble) vl; break; case StorageType.SqlSingle: value = -(SqlSingle) vl; break; case StorageType.SqlMoney: value = -(SqlMoney) vl; break; case StorageType.SqlInt64: value = -(SqlInt64) vl; break; case StorageType.SqlInt32: value = -(SqlInt32) vl; break; case StorageType.SqlInt16: value = -(SqlInt16) vl; break; default: Debug.Assert(false, "Missing a type conversion"); value = DBNull.Value; break; } return value; } throw ExprException.TypeMismatch(this.ToString()); case Operators.Not: if (vl is SqlBoolean){ if (((SqlBoolean)vl).IsFalse){ return SqlBoolean.True; } else if (((SqlBoolean)vl).IsTrue) { return SqlBoolean.False; } throw ExprException.UnsupportedOperator(op); // or should the result of not SQLNull be SqlNull ? } else{ if (DataExpression.ToBoolean(vl) != false) return false; return true; } default: throw ExprException.UnsupportedOperator(op); } } internal override bool IsConstant() { return(right.IsConstant()); } internal override bool IsTableConstant() { return(right.IsTableConstant()); } internal override bool HasLocalAggregate() { return(right.HasLocalAggregate()); } internal override bool HasRemoteAggregate() { return(right.HasRemoteAggregate()); } internal override bool DependsOn(DataColumn column) { return(right.DependsOn(column)); } internal override ExpressionNode Optimize() { right = right.Optimize(); if (this.IsConstant()) { object val = this.Eval(); return new ConstNode(table, ValueType.Object, val, false); } else return this; } } } // 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
- ObfuscateAssemblyAttribute.cs
- QilInvokeLateBound.cs
- DispatchWrapper.cs
- IxmlLineInfo.cs
- ParameterCollection.cs
- DragEvent.cs
- ChtmlFormAdapter.cs
- FontFamilyValueSerializer.cs
- DataConnectionHelper.cs
- HScrollProperties.cs
- RegexBoyerMoore.cs
- EdmFunctionAttribute.cs
- dbdatarecord.cs
- PageAction.cs
- SerializationUtility.cs
- RecognizedPhrase.cs
- IList.cs
- ContractBase.cs
- EventSetterHandlerConverter.cs
- XmlSchemaExporter.cs
- DbConvert.cs
- HtmlTableRowCollection.cs
- HttpDebugHandler.cs
- HtmlInputText.cs
- securitycriticaldata.cs
- ProfileSettingsCollection.cs
- TraceContextRecord.cs
- UniqueIdentifierService.cs
- InvalidEnumArgumentException.cs
- SqlProcedureAttribute.cs
- Currency.cs
- XmlUnspecifiedAttribute.cs
- IncrementalReadDecoders.cs
- CodeCatchClause.cs
- SmiEventSink.cs
- SortedDictionary.cs
- XmlDataImplementation.cs
- GridItemPatternIdentifiers.cs
- StaticSiteMapProvider.cs
- updatecommandorderer.cs
- EntityConnectionStringBuilder.cs
- WebPartTransformerAttribute.cs
- MessageQueueInstaller.cs
- xmlsaver.cs
- DataGridViewControlCollection.cs
- DatagridviewDisplayedBandsData.cs
- ServiceBusyException.cs
- AssemblyAssociatedContentFileAttribute.cs
- SimpleExpression.cs
- DataGridDesigner.cs
- Highlights.cs
- SoapCodeExporter.cs
- SByteConverter.cs
- UpdatePanel.cs
- Content.cs
- CodeGroup.cs
- SoapMessage.cs
- SystemFonts.cs
- DescendentsWalkerBase.cs
- DataControlImageButton.cs
- HtmlToClrEventProxy.cs
- ConsumerConnectionPoint.cs
- Page.cs
- PropertyConverter.cs
- RuntimeWrappedException.cs
- XsltLibrary.cs
- PagedControl.cs
- PrimitiveXmlSerializers.cs
- RunClient.cs
- Util.cs
- SafeTokenHandle.cs
- XpsSerializationException.cs
- SafeEventLogReadHandle.cs
- DecoderFallbackWithFailureFlag.cs
- SqlCacheDependencyDatabase.cs
- StrokeCollectionDefaultValueFactory.cs
- AssemblyContextControlItem.cs
- SQLDoubleStorage.cs
- SqlReferenceCollection.cs
- WebBrowserNavigatingEventHandler.cs
- QueryableFilterRepeater.cs
- ConnectionPoolManager.cs
- rsa.cs
- PackWebRequest.cs
- NativeCompoundFileAPIs.cs
- ConfigurationElement.cs
- DecimalAnimation.cs
- CriticalExceptions.cs
- StringAttributeCollection.cs
- Set.cs
- WebPartHelpVerb.cs
- WebControlParameterProxy.cs
- OneToOneMappingSerializer.cs
- RectangleGeometry.cs
- FactoryMaker.cs
- ControlPropertyNameConverter.cs
- CharacterString.cs
- NGCUIElementCollectionSerializerAsync.cs
- MarkupCompilePass1.cs
- SyntaxCheck.cs