Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / ndp / fx / src / DataEntity / System / Data / Common / QueryCache / EntityClientCacheKey.cs / 2 / 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
- NamedPipeWorkerProcess.cs
- AncillaryOps.cs
- XmlComment.cs
- Utils.cs
- PasswordRecovery.cs
- XPathConvert.cs
- ConfigurationStrings.cs
- TableProviderWrapper.cs
- XmlSchemaDatatype.cs
- SevenBitStream.cs
- METAHEADER.cs
- ObjectItemLoadingSessionData.cs
- SvcMapFile.cs
- DataGridViewControlCollection.cs
- DetailsViewPagerRow.cs
- MergeFilterQuery.cs
- RSAOAEPKeyExchangeDeformatter.cs
- ListSourceHelper.cs
- GridViewHeaderRowPresenterAutomationPeer.cs
- DefaultBindingPropertyAttribute.cs
- DelegateArgumentReference.cs
- Stackframe.cs
- EventEntry.cs
- EventLogPermissionEntry.cs
- TextServicesDisplayAttributePropertyRanges.cs
- RefType.cs
- RawAppCommandInputReport.cs
- RoleBoolean.cs
- Missing.cs
- SqlRetyper.cs
- InteropBitmapSource.cs
- FastEncoder.cs
- WebBrowserNavigatingEventHandler.cs
- XsdBuildProvider.cs
- StringUtil.cs
- BoundColumn.cs
- Converter.cs
- XmlSecureResolver.cs
- XmlParserContext.cs
- RectangleHotSpot.cs
- ContentElementAutomationPeer.cs
- ListBoxItem.cs
- HostSecurityManager.cs
- ClientSettings.cs
- SafeEventLogWriteHandle.cs
- XmlDocumentSerializer.cs
- DataRecord.cs
- GraphicsPath.cs
- CodeMethodReturnStatement.cs
- SqlMultiplexer.cs
- HitTestFilterBehavior.cs
- SchemaElementLookUpTable.cs
- PlainXmlSerializer.cs
- ExpressionPrefixAttribute.cs
- Panel.cs
- StylusDevice.cs
- CompressedStack.cs
- XmlSchemaRedefine.cs
- ThemeConfigurationDialog.cs
- SafeEventLogReadHandle.cs
- DBNull.cs
- EncoderParameters.cs
- OracleParameterBinding.cs
- TextEditorLists.cs
- DynamicILGenerator.cs
- XmlSchemaAppInfo.cs
- AnchoredBlock.cs
- TripleDESCryptoServiceProvider.cs
- ImageAutomationPeer.cs
- CellParaClient.cs
- XmlSchemaGroupRef.cs
- Pair.cs
- Path.cs
- BooleanFunctions.cs
- XPathNodeList.cs
- GeneralTransform.cs
- ToolboxDataAttribute.cs
- PathStreamGeometryContext.cs
- SctClaimDictionary.cs
- NullableBoolConverter.cs
- cookieexception.cs
- OdbcError.cs
- WebPartTransformerAttribute.cs
- brushes.cs
- FSWPathEditor.cs
- AuthenticationServiceManager.cs
- BookmarkOptionsHelper.cs
- OdbcStatementHandle.cs
- MenuItemAutomationPeer.cs
- DataContractSet.cs
- HexParser.cs
- GPStream.cs
- WindowPattern.cs
- TrustVersion.cs
- TargetPerspective.cs
- MouseDevice.cs
- OdbcConnectionOpen.cs
- ListViewTableCell.cs
- InstanceNormalEvent.cs
- WindowsGraphics2.cs