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
- MdiWindowListStrip.cs
- JsonServiceDocumentSerializer.cs
- GenericXmlSecurityToken.cs
- HeaderUtility.cs
- TdsParserSessionPool.cs
- CqlQuery.cs
- TypedDataSetSchemaImporterExtension.cs
- XmlDocumentType.cs
- DataGridViewToolTip.cs
- MSG.cs
- Win32KeyboardDevice.cs
- COM2ExtendedBrowsingHandler.cs
- ExpressionBindings.cs
- ToolboxItemWrapper.cs
- XamlSerializerUtil.cs
- LicenseException.cs
- LoaderAllocator.cs
- ExtractorMetadata.cs
- PeerCollaborationPermission.cs
- DataColumnCollection.cs
- TagPrefixAttribute.cs
- FieldInfo.cs
- NullableDoubleSumAggregationOperator.cs
- SoapAttributes.cs
- StringValueSerializer.cs
- OptimizedTemplateContentHelper.cs
- Vars.cs
- webeventbuffer.cs
- Stack.cs
- MultiViewDesigner.cs
- QueryOpeningEnumerator.cs
- __FastResourceComparer.cs
- PrintDialog.cs
- XamlBrushSerializer.cs
- ActivationArguments.cs
- TemplateParser.cs
- ConfigurationStrings.cs
- StateValidator.cs
- MemberBinding.cs
- MDIClient.cs
- ZipQueryOperator.cs
- UseLicense.cs
- HtmlEmptyTagControlBuilder.cs
- OwnerDrawPropertyBag.cs
- ReflectEventDescriptor.cs
- DetailsViewDeleteEventArgs.cs
- NumericUpDownAccelerationCollection.cs
- TemplateXamlParser.cs
- WorkflowQueueInfo.cs
- clipboard.cs
- SystemBrushes.cs
- MessageSmuggler.cs
- DataGridViewImageCell.cs
- ResXResourceSet.cs
- CodeAttachEventStatement.cs
- Utils.cs
- BitStack.cs
- ThreadBehavior.cs
- BitStream.cs
- Library.cs
- ModuleBuilderData.cs
- ButtonColumn.cs
- SymmetricSecurityProtocol.cs
- WindowsScrollBarBits.cs
- CommonGetThemePartSize.cs
- CodeDomDesignerLoader.cs
- FacetValues.cs
- ContractNamespaceAttribute.cs
- KeyboardEventArgs.cs
- KoreanCalendar.cs
- Rfc2898DeriveBytes.cs
- CompositeCollection.cs
- DataGridViewMethods.cs
- DataGridPageChangedEventArgs.cs
- ProfileBuildProvider.cs
- CallbackException.cs
- DataSourceXmlSerializationAttribute.cs
- XmlWriterTraceListener.cs
- BitVector32.cs
- ConfigurationManagerInternalFactory.cs
- EventMetadata.cs
- SoapReflectionImporter.cs
- CompiledELinqQueryState.cs
- DefaultWorkflowTransactionService.cs
- CmsUtils.cs
- MdbDataFileEditor.cs
- DetailsViewUpdatedEventArgs.cs
- Header.cs
- RegexCaptureCollection.cs
- UriExt.cs
- RuleSettingsCollection.cs
- ObjectListCommand.cs
- TextProperties.cs
- SafeCloseHandleCritical.cs
- DataServices.cs
- BaseResourcesBuildProvider.cs
- DataBoundControlHelper.cs
- RichTextBoxConstants.cs
- XhtmlBasicPanelAdapter.cs
- HtmlTableRow.cs