AliasExpr.cs source code in C# .NET

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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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