Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / Common / EntitySql / AliasExpr.cs / 3 / AliasExpr.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] [....] //--------------------------------------------------------------------- namespace System.Data.Common.EntitySql { using System; using System.Globalization; using System.Collections; using System.Collections.Generic; ////// Represents a possibly aliased expression. /// internal sealed class AliasExpr : Expr { private Expr _expr; private Identifier _aliasId; internal AliasExpr( Expr expr , Identifier aliasId ) { ValidateAlias(aliasId); _aliasId = aliasId; _expr = expr; } internal AliasExpr( Expr expr ) { _expr = expr; } ////// returns true if expression is aliased, false otherwise /// internal bool HasAlias { get { return ( null != _aliasId ); } } ////// returns expression alias identifier, or null if not aliased /// internal Identifier AliasIdentifier { get { return _aliasId; } } ////// returns expression /// internal Expr Expr { get { return _expr; } } ////// validates alias identifier /// /// private static void ValidateAlias(Identifier aliasIdentifier) { if (String.IsNullOrEmpty(aliasIdentifier.Name)) { throw EntityUtil.EntitySqlError(aliasIdentifier.ErrCtx, System.Data.Entity.Strings.InvalidEmptyIdentifier); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] [....] //--------------------------------------------------------------------- namespace System.Data.Common.EntitySql { using System; using System.Globalization; using System.Collections; using System.Collections.Generic; ////// Represents a possibly aliased expression. /// internal sealed class AliasExpr : Expr { private Expr _expr; private Identifier _aliasId; internal AliasExpr( Expr expr , Identifier aliasId ) { ValidateAlias(aliasId); _aliasId = aliasId; _expr = expr; } internal AliasExpr( Expr expr ) { _expr = expr; } ////// returns true if expression is aliased, false otherwise /// internal bool HasAlias { get { return ( null != _aliasId ); } } ////// returns expression alias identifier, or null if not aliased /// internal Identifier AliasIdentifier { get { return _aliasId; } } ////// returns expression /// internal Expr Expr { get { return _expr; } } ////// validates alias identifier /// /// private static void ValidateAlias(Identifier aliasIdentifier) { if (String.IsNullOrEmpty(aliasIdentifier.Name)) { throw EntityUtil.EntitySqlError(aliasIdentifier.ErrCtx, System.Data.Entity.Strings.InvalidEmptyIdentifier); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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