DelayedRegex.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Configuration / DelayedRegex.cs / 1 / DelayedRegex.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.Configuration { 
 
    using System.Collections;
    using System.Configuration; 
    using System.IO;
    using System.Security;
    using System.Security.Permissions;
    using System.Text.RegularExpressions; 
    using System.Web.Configuration;
    using System.Web.Util; 
    using System.Xml; 

    using Pair = System.Web.UI.Pair; 

    internal class DelayedRegex {

        private String _regstring; 
        private Regex _regex;
 
        internal DelayedRegex(String s) { 
            _regex = null;
            _regstring = s; 
        }

        internal Match Match(String s) {
            EnsureRegex(); 
            return _regex.Match(s);
        } 
 
        internal int GroupNumberFromName(String name) {
            EnsureRegex(); 
            return _regex.GroupNumberFromName(name);
        }

        internal void EnsureRegex() { 
            string regstring = _regstring;
            if(_regex == null) { 
                _regex = new Regex(regstring); 
                //free original
                _regstring = null; 
            }
            return;
        }
    } 
}

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