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/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / Common / EntitySql / DotExpr.cs / 2 / DotExpr.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @bacukp [....] //--------------------------------------------------------------------- namespace System.Data.Common.EntitySql { using System; using System.Globalization; using System.Collections; using System.Collections.Generic; ////// represents dotExpr (expr)+.Identifier /// internal sealed class DotExpr : Expr #if EXTRA_ENTITYSQL_PARSER_DEBUGGING , IEnumerable#endif { private Expr _leftExpr; private Identifier _identifier; private bool _wasDotIdComputed; private bool _isDottedIdentifier; private string[] _identifierNames; private string _fullName; private int _length; private Expr _leftmostExpr; /// /// initializes /// /// /// internal DotExpr( Expr expr, Identifier id ) { _leftExpr = expr; _identifier = id; } internal Expr Left { get { return _leftExpr; } } internal Identifier Identifier { get { return _identifier; } } internal bool IsDottedIdentifier { get { CheckIfDotIdentifier(); return _isDottedIdentifier; } } internal int Length { get { CheckIfDotIdentifier(); return _length; } } internal string[] Names { get { CheckIfDotIdentifier(); return _identifierNames; } } internal string FullName { get { CheckIfDotIdentifier(); return _fullName; } } internal Expr LeftMostExpression { get { CheckIfDotIdentifier(); return _leftmostExpr; } } // // Delay computation and cache results // private void CheckIfDotIdentifier() { if (_wasDotIdComputed) { return; } _wasDotIdComputed = true; // // Get number of 'elements' // _length = 0; _isDottedIdentifier = false; Expr expr = this; while (expr is DotExpr) { _length++; expr = ((DotExpr)expr).Left; } if (expr is Identifier) { _isDottedIdentifier = true; _length++; } else { _leftmostExpr = expr; } _identifierNames = new string[_length]; int i = _length - 1; expr = this; while (expr is DotExpr) { DotExpr dotExpr = (DotExpr)expr; _identifierNames[i--] = dotExpr.Identifier.Name; expr = dotExpr.Left; } if (null == _leftmostExpr && null != expr) { _identifierNames[i] = ((Identifier)expr).Name; } _fullName = String.Join(".", _identifierNames); } #if EXTRA_ENTITYSQL_PARSER_DEBUGGING #region GetEnumerator public IEnumeratorGetEnumerator() { Expr _expr = this; while (_expr is DotExpr) { yield return _expr; _expr = ((DotExpr)_expr).Left; } } System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { return GetEnumerator(); } #endregion #endif } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @bacukp [....] //--------------------------------------------------------------------- namespace System.Data.Common.EntitySql { using System; using System.Globalization; using System.Collections; using System.Collections.Generic; ////// represents dotExpr (expr)+.Identifier /// internal sealed class DotExpr : Expr #if EXTRA_ENTITYSQL_PARSER_DEBUGGING , IEnumerable#endif { private Expr _leftExpr; private Identifier _identifier; private bool _wasDotIdComputed; private bool _isDottedIdentifier; private string[] _identifierNames; private string _fullName; private int _length; private Expr _leftmostExpr; /// /// initializes /// /// /// internal DotExpr( Expr expr, Identifier id ) { _leftExpr = expr; _identifier = id; } internal Expr Left { get { return _leftExpr; } } internal Identifier Identifier { get { return _identifier; } } internal bool IsDottedIdentifier { get { CheckIfDotIdentifier(); return _isDottedIdentifier; } } internal int Length { get { CheckIfDotIdentifier(); return _length; } } internal string[] Names { get { CheckIfDotIdentifier(); return _identifierNames; } } internal string FullName { get { CheckIfDotIdentifier(); return _fullName; } } internal Expr LeftMostExpression { get { CheckIfDotIdentifier(); return _leftmostExpr; } } // // Delay computation and cache results // private void CheckIfDotIdentifier() { if (_wasDotIdComputed) { return; } _wasDotIdComputed = true; // // Get number of 'elements' // _length = 0; _isDottedIdentifier = false; Expr expr = this; while (expr is DotExpr) { _length++; expr = ((DotExpr)expr).Left; } if (expr is Identifier) { _isDottedIdentifier = true; _length++; } else { _leftmostExpr = expr; } _identifierNames = new string[_length]; int i = _length - 1; expr = this; while (expr is DotExpr) { DotExpr dotExpr = (DotExpr)expr; _identifierNames[i--] = dotExpr.Identifier.Name; expr = dotExpr.Left; } if (null == _leftmostExpr && null != expr) { _identifierNames[i] = ((Identifier)expr).Name; } _fullName = String.Join(".", _identifierNames); } #if EXTRA_ENTITYSQL_PARSER_DEBUGGING #region GetEnumerator public IEnumeratorGetEnumerator() { Expr _expr = this; while (_expr is DotExpr) { yield return _expr; _expr = ((DotExpr)_expr).Left; } } System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { return GetEnumerator(); } #endregion #endif } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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