IdentityModelDictionary.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / IdentityModel / System / IdentityModel / IdentityModelDictionary.cs / 1305376 / IdentityModelDictionary.cs
                        

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

namespace System.IdentityModel 
{
    using System.Xml; 
    using System.Collections.Generic; 

    class IdentityModelDictionary : IXmlDictionary 
    {
        static public readonly IdentityModelDictionary Version1 = new IdentityModelDictionary(new IdentityModelStringsVersion1());
        IdentityModelStrings strings;
        int count; 
        XmlDictionaryString[] dictionaryStrings;
        Dictionary dictionary; 
        XmlDictionaryString[] versionedDictionaryStrings; 

        public IdentityModelDictionary(IdentityModelStrings strings) 
        {
            this.strings = strings;
            this.count = strings.Count;
        } 

        static public IdentityModelDictionary CurrentVersion 
        { 
            get
            { 
                return Version1;
            }
        }
 
        public XmlDictionaryString CreateString(string value, int key)
        { 
            return new XmlDictionaryString(this, value, key); 
        }
 
        public bool TryLookup(string key, out XmlDictionaryString value)
        {
            if (key == null)
                throw  DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("key")); 
            if (this.dictionary == null)
            { 
                Dictionary dictionary = new Dictionary(count); 
                for (int i = 0; i < count; i++)
                    dictionary.Add(strings[i], i); 
                this.dictionary = dictionary;
            }
            int id;
            if (this.dictionary.TryGetValue(key, out id)) 
                return TryLookup(id, out value);
            value = null; 
            return false; 
        }
 
        public bool TryLookup(int key, out XmlDictionaryString value)
        {
            if (key < 0 || key >= count)
            { 
                value = null;
                return false; 
            } 
            if (dictionaryStrings == null)
                dictionaryStrings = new XmlDictionaryString[count]; 
            XmlDictionaryString s = dictionaryStrings[key];
            if (s == null)
            {
                s = CreateString(strings[key], key); 
                dictionaryStrings[key]= s;
            } 
            value = s; 
            return true;
        } 

        public bool TryLookup(XmlDictionaryString key, out XmlDictionaryString value)
        {
            if (key == null) 
                throw  DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("key"));
            if (key.Dictionary == this) 
            { 
                value = key;
                return true; 
            }
            if (key.Dictionary == CurrentVersion)
            {
                if (versionedDictionaryStrings == null) 
                    versionedDictionaryStrings = new XmlDictionaryString[CurrentVersion.count];
                XmlDictionaryString s = versionedDictionaryStrings[key.Key]; 
                if (s == null) 
                {
                    if (!TryLookup(key.Value, out s)) 
                    {
                        value = null;
                        return false;
                    } 
                    versionedDictionaryStrings[key.Key] = s;
                } 
                value = s; 
                return true;
            } 
            value = null;
            return false;
        }
    } 
}

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

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