XmlDictionaryString.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 / Serialization / System / Xml / XmlDictionaryString.cs / 1305376 / XmlDictionaryString.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------
namespace System.Xml
{ 
    using System;
    using System.Xml; 
    using System.Text; 
    using System.Diagnostics;
    using System.Runtime.Serialization; 

    public class XmlDictionaryString
    {
        internal const int MinKey = 0; 
        internal const int MaxKey = int.MaxValue / 4;
 
        IXmlDictionary dictionary; 
        string value;
        int key; 
        byte[] buffer;
        static EmptyStringDictionary emptyStringDictionary = new EmptyStringDictionary();

        public XmlDictionaryString(IXmlDictionary dictionary, string value, int key) 
        {
            if (dictionary == null) 
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("dictionary")); 
            if (value == null)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("value")); 
            if (key < MinKey || key > MaxKey)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("key", SR.GetString(SR.ValueMustBeInRange, MinKey, MaxKey)));
            this.dictionary = dictionary;
            this.value = value; 
            this.key = key;
        } 
 
        static internal string GetString(XmlDictionaryString s)
        { 
            if (s == null)
                return null;
            return s.Value;
        } 

        static public XmlDictionaryString Empty 
        { 
            get
            { 
                return emptyStringDictionary.EmptyString;
            }
        }
 
        public IXmlDictionary Dictionary
        { 
            get 
            {
                return dictionary; 
            }
        }

        public int Key 
        {
            get 
            { 
                return key;
            } 
        }

        public string Value
        { 
            get
            { 
                return value; 
            }
        } 

        internal byte[] ToUTF8()
        {
            if (buffer == null) 
                buffer = System.Text.Encoding.UTF8.GetBytes(value);
            return buffer; 
        } 

        public override string ToString() 
        {
            return value;
        }
 
        class EmptyStringDictionary : IXmlDictionary
        { 
            XmlDictionaryString empty; 

            public EmptyStringDictionary() 
            {
                empty = new XmlDictionaryString(this, string.Empty, 0);
            }
 
            public XmlDictionaryString EmptyString
            { 
                get 
                {
                    return empty; 
                }
            }

            public bool TryLookup(string value, out XmlDictionaryString result) 
            {
                if (value == null) 
                    throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("value"); 
                if (value.Length == 0)
                { 
                    result = empty;
                    return true;
                }
                result = null; 
                return false;
            } 
 
            public bool TryLookup(int key, out XmlDictionaryString result)
            { 
                if (key == 0)
                {
                    result = empty;
                    return true; 
                }
                result = null; 
                return false; 
            }
 
            public bool TryLookup(XmlDictionaryString value, out XmlDictionaryString result)
            {
                if (value == null)
                    throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("value")); 
                if (value.Dictionary != this)
                { 
                    result = null; 
                    return false;
                } 
                result = value;
                return true;
            }
        } 
    }
} 

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

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