Identifier.cs source code in C# .NET

                        Code:
                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / Common / EntitySql / Identifier.cs / 4 / Identifier.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backup [....] 
//--------------------------------------------------------------------- 

namespace System.Data.Common.EntitySql 
{
    using System;
    using System.Globalization;
    using System.Collections; 
    using System.Collections.Generic;
    using System.Diagnostics; 
    using System.Text; 

    ///  
    /// represents identifier
    /// 
    internal sealed class Identifier : Expr
    { 
        private string _name;
        private bool _isEscaped; 
 
        /// 
        /// initializes identifier 
        /// 
        /// 
        /// 
        ///  
        /// 
        internal Identifier( string symbol, bool isEscaped, string query, int inputPos ) 
            : base(query, inputPos) 
        {
            ValidateIdentifier(symbol, isEscaped); 
            _name = symbol;
            _isEscaped = isEscaped;
        }
 
        /// 
        /// returns identifier name (without escaping chars if escaped id) 
        ///  
        internal string Name
        { 
            get { return (IsEscaped) ? _name.Substring(1, _name.Length - 2) : _name; }
        }

        ///  
        /// returns original identifier name
        ///  
        internal string OriginalName 
        {
            get { return _name; } 
        }

        /// 
        /// returns if an identifier is escaped 
        /// 
        internal bool IsEscaped 
        { 
            get { return _isEscaped; }
        } 

        private void ValidateIdentifier( string symbol, bool isEscaped )
        {
            if (isEscaped) 
            {
                Debug.Assert(!String.IsNullOrEmpty(symbol), "!String.IsNullOrEmpty(symbol)"); 
                if (symbol[0] != '[' || symbol[symbol.Length - 1] != ']') 
                {
                    throw EntityUtil.EntitySqlError(this.ErrCtx, System.Data.Entity.Strings.InvalidEscapedIdentifier(symbol)); 
                }
            }
            else
            { 
                // this is a special case since our language grammar does NOT allow [] to be used as
                // part of identifiers, but it is needed for Byte[] as type identifier. The only case when 
                // [] will show up at the end as in 'System.Byte[]' 
                if (symbol.Length > 1 &&
                    symbol[symbol.Length - 2] == '[' && 
                    symbol[symbol.Length - 1] == ']')
                {
                    symbol = symbol.Substring(0, symbol.Length - 2);
                } 

                bool isIdentifierASCII = true; 
                if (!CqlLexer.IsLetterOrDigitOrUnderscore(symbol, out isIdentifierASCII)) 
                {
                    if (isIdentifierASCII) 
                    {
                        throw EntityUtil.EntitySqlError(this.ErrCtx, System.Data.Entity.Strings.InvalidSimpleIdentifier(symbol));
                    }
                    else 
                    {
                        throw EntityUtil.EntitySqlError(this.ErrCtx, System.Data.Entity.Strings.InvalidSimpleIdentifierNonASCII(symbol)); 
                    } 
                }
            } 
        }
    }

    ///  
    /// represents dotted identifier
    ///  
    internal sealed class DottedIdentifier : Expr 
    {
        private List _identifiers = new List(); 
        private string[] _names;
        private string _fullName;

        ///  
        /// intializes singleton dot identifier => simple id
        ///  
        ///  
        internal DottedIdentifier( Identifier id )
        { 
            _identifiers.Add(id);
            _names = new string[] { id.Name };
            _fullName = id.Name;
            ErrCtx = id.ErrCtx; 
        }
 
        ///  
        /// intializes dot identifier from dot expression
        ///  
        /// 
        internal DottedIdentifier( DotExpr dotExpr )
        {
            _names = dotExpr.Names; 
            _fullName = dotExpr.FullName;
 
            Expr expr = dotExpr; 
            while (expr is DotExpr)
            { 
                DotExpr newDotExpr = (DotExpr)expr;
                _identifiers.Add(newDotExpr.Identifier);
                expr = newDotExpr.Left;
            } 
            _identifiers.Add((Identifier)expr);
            _identifiers.Reverse(); 
            ErrCtx = expr.ErrCtx; 
            ErrCtx.ErrorContextInfo = EntityRes.CtxIdentifier;
        } 

        /// 
        /// returns fqn as single string
        ///  
        internal string FullName
        { 
            get { return _fullName; } 
        }
 
        /// 
        /// returns array of names
        /// 
        internal string[] Names 
        {
            get { return _names; } 
        } 
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backup [....] 
//--------------------------------------------------------------------- 

namespace System.Data.Common.EntitySql 
{
    using System;
    using System.Globalization;
    using System.Collections; 
    using System.Collections.Generic;
    using System.Diagnostics; 
    using System.Text; 

    ///  
    /// represents identifier
    /// 
    internal sealed class Identifier : Expr
    { 
        private string _name;
        private bool _isEscaped; 
 
        /// 
        /// initializes identifier 
        /// 
        /// 
        /// 
        ///  
        /// 
        internal Identifier( string symbol, bool isEscaped, string query, int inputPos ) 
            : base(query, inputPos) 
        {
            ValidateIdentifier(symbol, isEscaped); 
            _name = symbol;
            _isEscaped = isEscaped;
        }
 
        /// 
        /// returns identifier name (without escaping chars if escaped id) 
        ///  
        internal string Name
        { 
            get { return (IsEscaped) ? _name.Substring(1, _name.Length - 2) : _name; }
        }

        ///  
        /// returns original identifier name
        ///  
        internal string OriginalName 
        {
            get { return _name; } 
        }

        /// 
        /// returns if an identifier is escaped 
        /// 
        internal bool IsEscaped 
        { 
            get { return _isEscaped; }
        } 

        private void ValidateIdentifier( string symbol, bool isEscaped )
        {
            if (isEscaped) 
            {
                Debug.Assert(!String.IsNullOrEmpty(symbol), "!String.IsNullOrEmpty(symbol)"); 
                if (symbol[0] != '[' || symbol[symbol.Length - 1] != ']') 
                {
                    throw EntityUtil.EntitySqlError(this.ErrCtx, System.Data.Entity.Strings.InvalidEscapedIdentifier(symbol)); 
                }
            }
            else
            { 
                // this is a special case since our language grammar does NOT allow [] to be used as
                // part of identifiers, but it is needed for Byte[] as type identifier. The only case when 
                // [] will show up at the end as in 'System.Byte[]' 
                if (symbol.Length > 1 &&
                    symbol[symbol.Length - 2] == '[' && 
                    symbol[symbol.Length - 1] == ']')
                {
                    symbol = symbol.Substring(0, symbol.Length - 2);
                } 

                bool isIdentifierASCII = true; 
                if (!CqlLexer.IsLetterOrDigitOrUnderscore(symbol, out isIdentifierASCII)) 
                {
                    if (isIdentifierASCII) 
                    {
                        throw EntityUtil.EntitySqlError(this.ErrCtx, System.Data.Entity.Strings.InvalidSimpleIdentifier(symbol));
                    }
                    else 
                    {
                        throw EntityUtil.EntitySqlError(this.ErrCtx, System.Data.Entity.Strings.InvalidSimpleIdentifierNonASCII(symbol)); 
                    } 
                }
            } 
        }
    }

    ///  
    /// represents dotted identifier
    ///  
    internal sealed class DottedIdentifier : Expr 
    {
        private List _identifiers = new List(); 
        private string[] _names;
        private string _fullName;

        ///  
        /// intializes singleton dot identifier => simple id
        ///  
        ///  
        internal DottedIdentifier( Identifier id )
        { 
            _identifiers.Add(id);
            _names = new string[] { id.Name };
            _fullName = id.Name;
            ErrCtx = id.ErrCtx; 
        }
 
        ///  
        /// intializes dot identifier from dot expression
        ///  
        /// 
        internal DottedIdentifier( DotExpr dotExpr )
        {
            _names = dotExpr.Names; 
            _fullName = dotExpr.FullName;
 
            Expr expr = dotExpr; 
            while (expr is DotExpr)
            { 
                DotExpr newDotExpr = (DotExpr)expr;
                _identifiers.Add(newDotExpr.Identifier);
                expr = newDotExpr.Left;
            } 
            _identifiers.Add((Identifier)expr);
            _identifiers.Reverse(); 
            ErrCtx = expr.ErrCtx; 
            ErrCtx.ErrorContextInfo = EntityRes.CtxIdentifier;
        } 

        /// 
        /// returns fqn as single string
        ///  
        internal string FullName
        { 
            get { return _fullName; } 
        }
 
        /// 
        /// returns array of names
        /// 
        internal string[] Names 
        {
            get { return _names; } 
        } 
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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