Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / Data / System / Data / Filter / NameNode.cs / 1 / NameNode.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data { using System; using System.ComponentModel; using System.Collections.Generic; using System.Diagnostics; using System.Globalization; internal sealed class NameNode : ExpressionNode { internal char open = '\0'; internal char close = '\0'; internal string name; internal bool found; internal bool type = false; internal DataColumn column; internal NameNode(DataTable table, char[] text, int start, int pos) : base(table) { this.name = ParseName(text, start, pos); } internal NameNode(DataTable table, string name) : base(table) { this.name = name; } internal override bool IsSqlColumn{ get{ return column.IsSqlType; } } internal override void Bind(DataTable table, Listlist) { BindTable(table); if (table == null) throw ExprException.UnboundName(name); try { this.column = table.Columns[name]; } catch (Exception e) { found = false; // if (!Common.ADP.IsCatchableExceptionType(e)) { throw; } throw ExprException.UnboundName(name); } if (column == null) throw ExprException.UnboundName(name); name = column.ColumnName; found = true; // add column to the dependency list, do not add duplicate columns Debug.Assert(column != null, "Failed to bind column " + name); int i; for (i = 0; i < list.Count; i++) { // walk the list, check if the current column already on the list DataColumn dataColumn = list[i]; if (column == dataColumn) { break; } } if (i >= list.Count) { list.Add(column); } } internal override object Eval() { // can not eval column without ROW value; throw ExprException.EvalNoContext(); } internal override object Eval(DataRow row, DataRowVersion version) { if (!found) { throw ExprException.UnboundName(name); } if (row == null) { if(IsTableConstant()) // this column is TableConstant Aggregate Function return column.DataExpression.Evaluate(); else { throw ExprException.UnboundName(name); } } return column[row.GetRecordFromVersion(version)]; } internal override object Eval(int[] records) { throw ExprException.ComputeNotAggregate(this.ToString()); } internal override bool IsConstant() { return false; } internal override bool IsTableConstant() { if (column != null && column.Computed) { return this.column.DataExpression.IsTableAggregate(); } return false; } internal override bool HasLocalAggregate() { if (column != null && column.Computed) { return this.column.DataExpression.HasLocalAggregate(); } return false; } internal override bool HasRemoteAggregate() { if (column != null && column.Computed) { return this.column.DataExpression.HasRemoteAggregate(); } return false; } internal override bool DependsOn(DataColumn column) { if (this.column == column) return true; if (this.column.Computed) { return this.column.DataExpression.DependsOn(column); } return false; } internal override ExpressionNode Optimize() { return this; } /// /// Parses given name and checks it validity /// internal static string ParseName(char[] text, int start, int pos) { char esc = '\0'; string charsToEscape = ""; int saveStart = start; int savePos = pos; if (text[start] == '`') { Debug.Assert(text[checked((int)pos-1)] == '`', "Invalid identifyer bracketing, pos = " + pos.ToString(CultureInfo.InvariantCulture) + ", end = " + text[checked((int)pos-1)].ToString(CultureInfo.InvariantCulture)); start = checked((int)start+1); pos = checked((int)pos-1); esc = '\\'; charsToEscape = "`"; } else if (text[start] == '[') { Debug.Assert(text[checked((int)pos-1)] == ']', "Invalid identifyer bracketing of name " + new string(text, start, pos-start) + " pos = " + pos.ToString(CultureInfo.InvariantCulture) + ", end = " + text[checked((int)pos-1)].ToString(CultureInfo.InvariantCulture)); start = checked((int)start+1); pos = checked((int)pos-1); esc = '\\'; charsToEscape = "]\\"; } if (esc != '\0') { // scan the name in search for the ESC int posEcho = start; for (int i = start; i < pos; i++) { if (text[i] == esc) { if (i+1 < pos && charsToEscape.IndexOf(text[i+1]) >= 0) { i++; } } text[posEcho] = text[i]; posEcho++; } pos = posEcho; } if (pos == start) throw ExprException.InvalidName(new string(text, saveStart, savePos - saveStart)); return new string(text, start, pos - start); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data { using System; using System.ComponentModel; using System.Collections.Generic; using System.Diagnostics; using System.Globalization; internal sealed class NameNode : ExpressionNode { internal char open = '\0'; internal char close = '\0'; internal string name; internal bool found; internal bool type = false; internal DataColumn column; internal NameNode(DataTable table, char[] text, int start, int pos) : base(table) { this.name = ParseName(text, start, pos); } internal NameNode(DataTable table, string name) : base(table) { this.name = name; } internal override bool IsSqlColumn{ get{ return column.IsSqlType; } } internal override void Bind(DataTable table, Listlist) { BindTable(table); if (table == null) throw ExprException.UnboundName(name); try { this.column = table.Columns[name]; } catch (Exception e) { found = false; // if (!Common.ADP.IsCatchableExceptionType(e)) { throw; } throw ExprException.UnboundName(name); } if (column == null) throw ExprException.UnboundName(name); name = column.ColumnName; found = true; // add column to the dependency list, do not add duplicate columns Debug.Assert(column != null, "Failed to bind column " + name); int i; for (i = 0; i < list.Count; i++) { // walk the list, check if the current column already on the list DataColumn dataColumn = list[i]; if (column == dataColumn) { break; } } if (i >= list.Count) { list.Add(column); } } internal override object Eval() { // can not eval column without ROW value; throw ExprException.EvalNoContext(); } internal override object Eval(DataRow row, DataRowVersion version) { if (!found) { throw ExprException.UnboundName(name); } if (row == null) { if(IsTableConstant()) // this column is TableConstant Aggregate Function return column.DataExpression.Evaluate(); else { throw ExprException.UnboundName(name); } } return column[row.GetRecordFromVersion(version)]; } internal override object Eval(int[] records) { throw ExprException.ComputeNotAggregate(this.ToString()); } internal override bool IsConstant() { return false; } internal override bool IsTableConstant() { if (column != null && column.Computed) { return this.column.DataExpression.IsTableAggregate(); } return false; } internal override bool HasLocalAggregate() { if (column != null && column.Computed) { return this.column.DataExpression.HasLocalAggregate(); } return false; } internal override bool HasRemoteAggregate() { if (column != null && column.Computed) { return this.column.DataExpression.HasRemoteAggregate(); } return false; } internal override bool DependsOn(DataColumn column) { if (this.column == column) return true; if (this.column.Computed) { return this.column.DataExpression.DependsOn(column); } return false; } internal override ExpressionNode Optimize() { return this; } /// /// Parses given name and checks it validity /// internal static string ParseName(char[] text, int start, int pos) { char esc = '\0'; string charsToEscape = ""; int saveStart = start; int savePos = pos; if (text[start] == '`') { Debug.Assert(text[checked((int)pos-1)] == '`', "Invalid identifyer bracketing, pos = " + pos.ToString(CultureInfo.InvariantCulture) + ", end = " + text[checked((int)pos-1)].ToString(CultureInfo.InvariantCulture)); start = checked((int)start+1); pos = checked((int)pos-1); esc = '\\'; charsToEscape = "`"; } else if (text[start] == '[') { Debug.Assert(text[checked((int)pos-1)] == ']', "Invalid identifyer bracketing of name " + new string(text, start, pos-start) + " pos = " + pos.ToString(CultureInfo.InvariantCulture) + ", end = " + text[checked((int)pos-1)].ToString(CultureInfo.InvariantCulture)); start = checked((int)start+1); pos = checked((int)pos-1); esc = '\\'; charsToEscape = "]\\"; } if (esc != '\0') { // scan the name in search for the ESC int posEcho = start; for (int i = start; i < pos; i++) { if (text[i] == esc) { if (i+1 < pos && charsToEscape.IndexOf(text[i+1]) >= 0) { i++; } } text[posEcho] = text[i]; posEcho++; } pos = posEcho; } if (pos == start) throw ExprException.InvalidName(new string(text, saveStart, savePos - saveStart)); return new string(text, start, pos - start); } } } // 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
- VectorAnimation.cs
- IssuedTokenParametersElement.cs
- CacheOutputQuery.cs
- ExcCanonicalXml.cs
- CollectionBase.cs
- MatrixIndependentAnimationStorage.cs
- ContentElement.cs
- RequiredAttributeAttribute.cs
- ContainerTracking.cs
- SetterBase.cs
- SqlBulkCopyColumnMapping.cs
- MetadataLocation.cs
- OracleConnectionStringBuilder.cs
- CombinedHttpChannel.cs
- _Events.cs
- Table.cs
- TemplateBindingExtensionConverter.cs
- UnsettableComboBox.cs
- SystemIcmpV6Statistics.cs
- DbgUtil.cs
- DragDrop.cs
- OdbcErrorCollection.cs
- BulletChrome.cs
- Bold.cs
- ReflectEventDescriptor.cs
- DataGridViewColumnCollectionEditor.cs
- CompilationUtil.cs
- TextBlock.cs
- TextBoxBase.cs
- ButtonAutomationPeer.cs
- PersistenceProviderBehavior.cs
- HtmlTableRowCollection.cs
- AttributeEmitter.cs
- ConstructorBuilder.cs
- BStrWrapper.cs
- UIElementCollection.cs
- ExchangeUtilities.cs
- DecimalFormatter.cs
- WindowsHyperlink.cs
- MailBnfHelper.cs
- SimpleHandlerFactory.cs
- Parser.cs
- ForeignKeyConstraint.cs
- ToolBarButton.cs
- WebChannelFactory.cs
- MsmqReceiveHelper.cs
- FontCacheUtil.cs
- LinkUtilities.cs
- HashSet.cs
- FileIOPermission.cs
- Block.cs
- ProjectionPath.cs
- Attributes.cs
- documentsequencetextview.cs
- DoubleLinkList.cs
- Switch.cs
- ZipIOModeEnforcingStream.cs
- DiscoveryClientDuplexChannel.cs
- FrameAutomationPeer.cs
- Enum.cs
- PseudoWebRequest.cs
- XmlSchemas.cs
- XmlSchemas.cs
- ScriptingProfileServiceSection.cs
- ManipulationDelta.cs
- CodeConditionStatement.cs
- HttpCacheVary.cs
- HostingPreferredMapPath.cs
- DropSource.cs
- ResourceWriter.cs
- DataTrigger.cs
- EncodingTable.cs
- SoapAttributeAttribute.cs
- Hyperlink.cs
- nulltextcontainer.cs
- Italic.cs
- SuppressIldasmAttribute.cs
- Inflater.cs
- Popup.cs
- TypeToken.cs
- XmlQueryOutput.cs
- Object.cs
- NameService.cs
- WebPartsPersonalization.cs
- WebControl.cs
- CaretElement.cs
- ISFClipboardData.cs
- PolyQuadraticBezierSegmentFigureLogic.cs
- ClientApiGenerator.cs
- RootBrowserWindowProxy.cs
- Endpoint.cs
- DropDownList.cs
- TypedElement.cs
- CqlLexer.cs
- HttpWebRequest.cs
- ChangeProcessor.cs
- _NetworkingPerfCounters.cs
- WebAdminConfigurationHelper.cs
- SqlClientFactory.cs
- ImportCatalogPart.cs