XPathMessageFilterElementComparer.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Configuration / XPathMessageFilterElementComparer.cs / 1 / XPathMessageFilterElementComparer.cs
                        

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

namespace System.ServiceModel.Configuration 
{
    using System; 
    using System.ServiceModel.Dispatcher; 
    using System.Collections;
    using System.Text; 
    using System.Xml;

    public class XPathMessageFilterElementComparer : IComparer
    { 
        #region IComparer Members
 
        int IComparer.Compare(object x, object y) 
        {
            string elementKey1 = TranslateObjectToElementKey(x); 
            string elementKey2 = TranslateObjectToElementKey(y);

            return String.Compare(elementKey1, elementKey2, StringComparison.Ordinal);
        } 

        #endregion 
 
        internal static string ParseXPathString(XPathMessageFilter filter)
        { 
            return XPathMessageFilterElementComparer.ParseXPathString(filter, false);
        }
        internal static string ParseXPathString(XPathMessageFilter filter, bool throwOnFailure)
        { 
            XPathLexer lexer = new XPathLexer(filter.XPath);
            return XPathMessageFilterElementComparer.ParseXPathString(lexer, filter.Namespaces, throwOnFailure); 
        } 

        static string ParseXPathString(XPathLexer lexer, XmlNamespaceManager namespaceManager, bool throwOnFailure) 
        {
            string retVal = String.Empty;

            int currentTokenStart = lexer.FirstTokenChar; 
            if (lexer.MoveNext())
            { 
                XPathToken token = lexer.Token; 
                StringBuilder xPathString = new StringBuilder(XPathMessageFilterElementComparer.ParseXPathString(lexer, namespaceManager, throwOnFailure));
 
                if (XPathTokenID.NameTest == token.TokenID)
                {
                    string nsPrefix = token.Prefix;
                    if (!String.IsNullOrEmpty(nsPrefix)) 
                    {
                        string ns = namespaceManager.LookupNamespace(nsPrefix); 
                        if (!String.IsNullOrEmpty(ns)) 
                        {
                            xPathString = xPathString.Replace(nsPrefix, ns, currentTokenStart, nsPrefix.Length); 
                        }
                        else
                        {
                            if (throwOnFailure) 
                            {
                                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new IndexOutOfRangeException(SR.GetString(SR.ConfigXPathNamespacePrefixNotFound, nsPrefix))); 
                            } 
                        }
                    } 
                }

                retVal = xPathString.ToString();
            } 
            else
            { 
                retVal = lexer.ConsumedSubstring(); 
            }
 
            return retVal;
        }

        string TranslateObjectToElementKey(object obj) 
        {
            string elementKey = null; 
 
            if (obj.GetType().IsAssignableFrom(typeof(XPathMessageFilter)))
            { 
                elementKey = XPathMessageFilterElementComparer.ParseXPathString((XPathMessageFilter)obj);
            }
            else if (obj.GetType().IsAssignableFrom(typeof(XPathMessageFilterElement)))
            { 
                elementKey = XPathMessageFilterElementComparer.ParseXPathString(((XPathMessageFilterElement)obj).Filter);
            } 
            else if (obj.GetType().IsAssignableFrom(typeof(string))) 
            {
                elementKey = (string)obj; 
            }

            if (String.IsNullOrEmpty(elementKey))
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
                    SR.GetString(SR.ConfigCannotParseXPathFilter, obj.GetType().AssemblyQualifiedName))); 
            } 

            return elementKey; 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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