Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / Common / QueryCache / EntityClientCacheKey.cs / 3 / EntityClientCacheKey.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....], [....] //----------------------------------------------------------------------------- namespace System.Data.Common.QueryCache { using System; using System.Collections.Generic; using System.Text; using System.Data.EntityClient; using System.Globalization; using System.Diagnostics; using System.Data.Metadata.Edm; ////// Represents EntityCommand Cache key context /// internal sealed class EntityClientCacheKey : QueryCacheKey { ////// Stored procedure or command text? /// readonly CommandType _commandType; ////// Entity Sql statement /// readonly string _eSqlStatement; ////// parameter collection token /// readonly string _parametersToken; ////// number of parameters /// readonly int _parameterCount; ////// Combined Hashcode based on component hashcodes /// readonly int _hashCode; ////// Creates a new instance of EntityClientCacheKey given a entityCommand instance /// /// internal EntityClientCacheKey(EntityCommand entityCommand) : base() { // Command Type _commandType = entityCommand.CommandType; // Statement _eSqlStatement = entityCommand.CommandText; // Parameters _parametersToken = GetParametersToken(entityCommand); _parameterCount = entityCommand.Parameters.Count; // Hashcode _hashCode = _commandType.GetHashCode() ^ _eSqlStatement.GetHashCode() ^ _parametersToken.GetHashCode(); } ////// determines equality of two cache keys based on cache context values /// /// ///public override bool Equals( object otherObject ) { Debug.Assert(null != otherObject, "otherObject must not be null"); if (typeof(EntityClientCacheKey) != otherObject.GetType()) { return false; } EntityClientCacheKey otherEntityClientCacheKey = (EntityClientCacheKey)otherObject; return (_commandType == otherEntityClientCacheKey._commandType && _parameterCount == otherEntityClientCacheKey._parameterCount) && Equals(otherEntityClientCacheKey._eSqlStatement, _eSqlStatement) && Equals(otherEntityClientCacheKey._parametersToken, _parametersToken); } /// /// Returns Context Hash Code /// ///public override int GetHashCode() { return _hashCode; } /// /// Returns a string representation of the parameter list /// /// ///private static string GetParametersToken(EntityCommand entityCommand) { if (null == entityCommand.Parameters || 0 == entityCommand.Parameters.Count) { // // means no parameters // return "@@0"; } else if (1 == entityCommand.Parameters.Count) { // if its one parameter only, there is no need to use stringbuilder Dictionary paramTypeUsage = entityCommand.GetParameterTypeUsage(); Debug.Assert(paramTypeUsage.Count == entityCommand.Parameters.Count, "entityParameter collection and query parameter collection must have the same number of entries"); return "@@1:" + entityCommand.Parameters[0].ParameterName + ":" + paramTypeUsage[entityCommand.Parameters[0].ParameterName].EdmType.FullName; } else { StringBuilder sb = new StringBuilder(entityCommand.Parameters.Count * EstimatedParameterStringSize); Dictionary paramTypeUsage = entityCommand.GetParameterTypeUsage(); Debug.Assert(paramTypeUsage.Count == entityCommand.Parameters.Count, "entityParameter collection and query parameter collection must have the same number of entries"); sb.Append("@@"); sb.Append(entityCommand.Parameters.Count); sb.Append(":"); string separator = ""; foreach (KeyValuePair param in paramTypeUsage) { sb.Append(separator); sb.Append(param.Key); sb.Append(":"); sb.Append(param.Value.EdmType.FullName); separator = ";"; } return sb.ToString(); } } /// /// returns the composed cache key /// ///public override string ToString() { return String.Join("|", new string[] { Enum.GetName(typeof(CommandType), _commandType), _eSqlStatement, _parametersToken }); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....], [....] //----------------------------------------------------------------------------- namespace System.Data.Common.QueryCache { using System; using System.Collections.Generic; using System.Text; using System.Data.EntityClient; using System.Globalization; using System.Diagnostics; using System.Data.Metadata.Edm; ////// Represents EntityCommand Cache key context /// internal sealed class EntityClientCacheKey : QueryCacheKey { ////// Stored procedure or command text? /// readonly CommandType _commandType; ////// Entity Sql statement /// readonly string _eSqlStatement; ////// parameter collection token /// readonly string _parametersToken; ////// number of parameters /// readonly int _parameterCount; ////// Combined Hashcode based on component hashcodes /// readonly int _hashCode; ////// Creates a new instance of EntityClientCacheKey given a entityCommand instance /// /// internal EntityClientCacheKey(EntityCommand entityCommand) : base() { // Command Type _commandType = entityCommand.CommandType; // Statement _eSqlStatement = entityCommand.CommandText; // Parameters _parametersToken = GetParametersToken(entityCommand); _parameterCount = entityCommand.Parameters.Count; // Hashcode _hashCode = _commandType.GetHashCode() ^ _eSqlStatement.GetHashCode() ^ _parametersToken.GetHashCode(); } ////// determines equality of two cache keys based on cache context values /// /// ///public override bool Equals( object otherObject ) { Debug.Assert(null != otherObject, "otherObject must not be null"); if (typeof(EntityClientCacheKey) != otherObject.GetType()) { return false; } EntityClientCacheKey otherEntityClientCacheKey = (EntityClientCacheKey)otherObject; return (_commandType == otherEntityClientCacheKey._commandType && _parameterCount == otherEntityClientCacheKey._parameterCount) && Equals(otherEntityClientCacheKey._eSqlStatement, _eSqlStatement) && Equals(otherEntityClientCacheKey._parametersToken, _parametersToken); } /// /// Returns Context Hash Code /// ///public override int GetHashCode() { return _hashCode; } /// /// Returns a string representation of the parameter list /// /// ///private static string GetParametersToken(EntityCommand entityCommand) { if (null == entityCommand.Parameters || 0 == entityCommand.Parameters.Count) { // // means no parameters // return "@@0"; } else if (1 == entityCommand.Parameters.Count) { // if its one parameter only, there is no need to use stringbuilder Dictionary paramTypeUsage = entityCommand.GetParameterTypeUsage(); Debug.Assert(paramTypeUsage.Count == entityCommand.Parameters.Count, "entityParameter collection and query parameter collection must have the same number of entries"); return "@@1:" + entityCommand.Parameters[0].ParameterName + ":" + paramTypeUsage[entityCommand.Parameters[0].ParameterName].EdmType.FullName; } else { StringBuilder sb = new StringBuilder(entityCommand.Parameters.Count * EstimatedParameterStringSize); Dictionary paramTypeUsage = entityCommand.GetParameterTypeUsage(); Debug.Assert(paramTypeUsage.Count == entityCommand.Parameters.Count, "entityParameter collection and query parameter collection must have the same number of entries"); sb.Append("@@"); sb.Append(entityCommand.Parameters.Count); sb.Append(":"); string separator = ""; foreach (KeyValuePair param in paramTypeUsage) { sb.Append(separator); sb.Append(param.Key); sb.Append(":"); sb.Append(param.Value.EdmType.FullName); separator = ";"; } return sb.ToString(); } } /// /// returns the composed cache key /// ///public override string ToString() { return String.Join("|", new string[] { Enum.GetName(typeof(CommandType), _commandType), _eSqlStatement, _parametersToken }); } } } // 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
- QueryPageSettingsEventArgs.cs
- ClassImporter.cs
- RoleManagerEventArgs.cs
- StateItem.cs
- Simplifier.cs
- CodeExporter.cs
- SessionPageStateSection.cs
- SchemaImporterExtensionElementCollection.cs
- TrustManagerPromptUI.cs
- DockPatternIdentifiers.cs
- XmlSchemaAny.cs
- ButtonChrome.cs
- SQLDecimalStorage.cs
- ProfileEventArgs.cs
- RegexReplacement.cs
- PeerHopCountAttribute.cs
- SingleSelectRootGridEntry.cs
- ValidationRuleCollection.cs
- HybridWebProxyFinder.cs
- RepeatButton.cs
- CodeDirectiveCollection.cs
- InitializationEventAttribute.cs
- DataGridViewRowContextMenuStripNeededEventArgs.cs
- CodeChecksumPragma.cs
- MarkupExtensionParser.cs
- ActivitySurrogateSelector.cs
- TimeZoneInfo.cs
- DataListDesigner.cs
- DockProviderWrapper.cs
- FixedSOMSemanticBox.cs
- DemultiplexingClientMessageFormatter.cs
- HebrewNumber.cs
- ReadOnlyDataSourceView.cs
- SafeHandles.cs
- ToolstripProfessionalRenderer.cs
- QilLiteral.cs
- _emptywebproxy.cs
- UnhandledExceptionEventArgs.cs
- CircleHotSpot.cs
- TextComposition.cs
- ProcessProtocolHandler.cs
- InputMethod.cs
- Permission.cs
- RootBrowserWindow.cs
- UnsafeNativeMethods.cs
- ObjectTag.cs
- ThicknessKeyFrameCollection.cs
- DragStartedEventArgs.cs
- PropertyRecord.cs
- DataGridViewTopLeftHeaderCell.cs
- HwndTarget.cs
- IdentityModelStringsVersion1.cs
- FragmentQuery.cs
- CookieParameter.cs
- SystemIPGlobalStatistics.cs
- Rijndael.cs
- XmlSerializerFactory.cs
- JoinCqlBlock.cs
- CryptoConfig.cs
- ConfigXmlReader.cs
- XmlMapping.cs
- StaticResourceExtension.cs
- StrokeCollectionDefaultValueFactory.cs
- Base64Encoder.cs
- OpenFileDialog.cs
- ASCIIEncoding.cs
- AssemblyResourceLoader.cs
- PersonalizationState.cs
- Mapping.cs
- XmlSchemaInfo.cs
- RadioButton.cs
- ModelPerspective.cs
- MgmtConfigurationRecord.cs
- BuildProviderUtils.cs
- CacheAxisQuery.cs
- TableItemPatternIdentifiers.cs
- assertwrapper.cs
- DataGridViewCellEventArgs.cs
- GradientBrush.cs
- SymLanguageVendor.cs
- DocumentXmlWriter.cs
- CodeBinaryOperatorExpression.cs
- UserCancellationException.cs
- WebPartVerbsEventArgs.cs
- DemultiplexingClientMessageFormatter.cs
- Int32Rect.cs
- DaylightTime.cs
- ControlCodeDomSerializer.cs
- PersistChildrenAttribute.cs
- XmlArrayItemAttribute.cs
- GPPOINTF.cs
- OdbcCommandBuilder.cs
- FormatException.cs
- TraceFilter.cs
- TextContainerChangeEventArgs.cs
- DesignTimeTemplateParser.cs
- LayoutEngine.cs
- ADMembershipUser.cs
- LinkedList.cs
- Slider.cs