106 lines
3.5 KiB
C#
106 lines
3.5 KiB
C#
//------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------
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namespace System.IdentityModel
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{
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using System.Xml;
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using System.Collections.Generic;
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class IdentityModelDictionary : IXmlDictionary
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{
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static public readonly IdentityModelDictionary Version1 = new IdentityModelDictionary(new IdentityModelStringsVersion1());
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IdentityModelStrings strings;
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int count;
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XmlDictionaryString[] dictionaryStrings;
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Dictionary<string, int> dictionary;
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XmlDictionaryString[] versionedDictionaryStrings;
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public IdentityModelDictionary(IdentityModelStrings strings)
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{
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this.strings = strings;
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this.count = strings.Count;
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}
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static public IdentityModelDictionary CurrentVersion
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{
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get
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{
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return Version1;
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}
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}
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public XmlDictionaryString CreateString(string value, int key)
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{
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return new XmlDictionaryString(this, value, key);
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}
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public bool TryLookup(string key, out XmlDictionaryString value)
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{
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if (key == null)
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("key"));
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if (this.dictionary == null)
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{
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Dictionary<string, int> dictionary = new Dictionary<string, int>(count);
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for (int i = 0; i < count; i++)
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dictionary.Add(strings[i], i);
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this.dictionary = dictionary;
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}
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int id;
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if (this.dictionary.TryGetValue(key, out id))
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return TryLookup(id, out value);
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value = null;
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return false;
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}
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public bool TryLookup(int key, out XmlDictionaryString value)
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{
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if (key < 0 || key >= count)
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{
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value = null;
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return false;
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}
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if (dictionaryStrings == null)
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dictionaryStrings = new XmlDictionaryString[count];
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XmlDictionaryString s = dictionaryStrings[key];
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if (s == null)
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{
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s = CreateString(strings[key], key);
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dictionaryStrings[key] = s;
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}
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value = s;
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return true;
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}
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public bool TryLookup(XmlDictionaryString key, out XmlDictionaryString value)
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{
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if (key == null)
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("key"));
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if (key.Dictionary == this)
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{
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value = key;
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return true;
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}
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if (key.Dictionary == CurrentVersion)
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{
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if (versionedDictionaryStrings == null)
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versionedDictionaryStrings = new XmlDictionaryString[CurrentVersion.count];
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XmlDictionaryString s = versionedDictionaryStrings[key.Key];
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if (s == null)
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{
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if (!TryLookup(key.Value, out s))
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{
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value = null;
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return false;
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}
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versionedDictionaryStrings[key.Key] = s;
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}
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value = s;
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return true;
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}
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value = null;
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return false;
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}
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}
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}
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