Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DLinq / Dlinq / CompiledQuery.cs / 1 / CompiledQuery.cs
using System; using System.Collections; using System.Collections.Generic; using System.Configuration; using System.Data; using System.Data.Common; using System.Linq.Expressions; using System.Globalization; using System.IO; using System.Linq; using System.Reflection; using System.Text; using System.Xml; using System.Transactions; using System.Data.Linq.Provider; using System.Diagnostics.CodeAnalysis; namespace System.Data.Linq { public sealed class CompiledQuery { LambdaExpression query; ICompiledQuery compiled; private CompiledQuery(LambdaExpression query) { this.query = query; } public LambdaExpression Expression { get { return this.query; } } [SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "[....]: Generic types are an important part of Linq APIs and they could not exist without nested generic support.")] public static FuncCompile (Expression > query) where TArg0 : DataContext { if (query == null) { Error.ArgumentNull("query"); } if (UseExpressionCompile(query)) { return query.Compile(); } else { return new CompiledQuery(query).Invoke ; } } [SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "[....]: Generic types are an important part of Linq APIs and they could not exist without nested generic support.")] public static Func Compile (Expression > query) where TArg0 : DataContext { if (query == null) { Error.ArgumentNull("query"); } if (UseExpressionCompile(query)) { return query.Compile(); } else { return new CompiledQuery(query).Invoke ; } } [SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "[....]: Generic types are an important part of Linq APIs and they could not exist without nested generic support.")] public static Func Compile (Expression > query) where TArg0 : DataContext { if (query == null) { Error.ArgumentNull("query"); } if (UseExpressionCompile(query)) { return query.Compile(); } else { return new CompiledQuery(query).Invoke ; } } [SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "[....]: Generic types are an important part of Linq APIs and they could not exist without nested generic support.")] public static Func Compile (Expression > query) where TArg0 : DataContext { if (query == null) { Error.ArgumentNull("query"); } if (UseExpressionCompile(query)) { return query.Compile(); } else { return new CompiledQuery(query).Invoke ; } } private static bool UseExpressionCompile(LambdaExpression query) { return typeof(ITable).IsAssignableFrom(query.Body.Type); } private TResult Invoke (TArg0 arg0) where TArg0 : DataContext { return (TResult) this.ExecuteQuery(arg0, new object[] {arg0}); } private TResult Invoke (TArg0 arg0, TArg1 arg1) where TArg0 : DataContext { return (TResult) this.ExecuteQuery(arg0, new object[] {arg0, arg1}); } private TResult Invoke (TArg0 arg0, TArg1 arg1, TArg2 arg2) where TArg0 : DataContext { return (TResult) this.ExecuteQuery(arg0, new object[] {arg0, arg1, arg2}); } private TResult Invoke (TArg0 arg0, TArg1 arg1, TArg2 arg2, TArg3 arg3) where TArg0 : DataContext { return (TResult) this.ExecuteQuery(arg0, new object[] {arg0, arg1, arg2, arg3}); } private object ExecuteQuery(DataContext context, object[] args) { if (context == null) { throw Error.ArgumentNull("context"); } if (this.compiled == null) { lock (this) { if (this.compiled == null) { this.compiled = context.Provider.Compile(this.query); } } } return this.compiled.Execute(context.Provider, args).ReturnValue; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. using System; using System.Collections; using System.Collections.Generic; using System.Configuration; using System.Data; using System.Data.Common; using System.Linq.Expressions; using System.Globalization; using System.IO; using System.Linq; using System.Reflection; using System.Text; using System.Xml; using System.Transactions; using System.Data.Linq.Provider; using System.Diagnostics.CodeAnalysis; namespace System.Data.Linq { public sealed class CompiledQuery { LambdaExpression query; ICompiledQuery compiled; private CompiledQuery(LambdaExpression query) { this.query = query; } public LambdaExpression Expression { get { return this.query; } } [SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "[....]: Generic types are an important part of Linq APIs and they could not exist without nested generic support.")] public static Func Compile (Expression > query) where TArg0 : DataContext { if (query == null) { Error.ArgumentNull("query"); } if (UseExpressionCompile(query)) { return query.Compile(); } else { return new CompiledQuery(query).Invoke ; } } [SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "[....]: Generic types are an important part of Linq APIs and they could not exist without nested generic support.")] public static Func Compile (Expression > query) where TArg0 : DataContext { if (query == null) { Error.ArgumentNull("query"); } if (UseExpressionCompile(query)) { return query.Compile(); } else { return new CompiledQuery(query).Invoke ; } } [SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "[....]: Generic types are an important part of Linq APIs and they could not exist without nested generic support.")] public static Func Compile (Expression > query) where TArg0 : DataContext { if (query == null) { Error.ArgumentNull("query"); } if (UseExpressionCompile(query)) { return query.Compile(); } else { return new CompiledQuery(query).Invoke ; } } [SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "[....]: Generic types are an important part of Linq APIs and they could not exist without nested generic support.")] public static Func Compile (Expression > query) where TArg0 : DataContext { if (query == null) { Error.ArgumentNull("query"); } if (UseExpressionCompile(query)) { return query.Compile(); } else { return new CompiledQuery(query).Invoke ; } } private static bool UseExpressionCompile(LambdaExpression query) { return typeof(ITable).IsAssignableFrom(query.Body.Type); } private TResult Invoke (TArg0 arg0) where TArg0 : DataContext { return (TResult) this.ExecuteQuery(arg0, new object[] {arg0}); } private TResult Invoke (TArg0 arg0, TArg1 arg1) where TArg0 : DataContext { return (TResult) this.ExecuteQuery(arg0, new object[] {arg0, arg1}); } private TResult Invoke (TArg0 arg0, TArg1 arg1, TArg2 arg2) where TArg0 : DataContext { return (TResult) this.ExecuteQuery(arg0, new object[] {arg0, arg1, arg2}); } private TResult Invoke (TArg0 arg0, TArg1 arg1, TArg2 arg2, TArg3 arg3) where TArg0 : DataContext { return (TResult) this.ExecuteQuery(arg0, new object[] {arg0, arg1, arg2, arg3}); } private object ExecuteQuery(DataContext context, object[] args) { if (context == null) { throw Error.ArgumentNull("context"); } if (this.compiled == null) { lock (this) { if (this.compiled == null) { this.compiled = context.Provider.Compile(this.query); } } } return this.compiled.Execute(context.Provider, args).ReturnValue; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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