RuleInfoComparer.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 / RuleInfoComparer.cs / 1 / RuleInfoComparer.cs
                        

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

namespace System.Web.Configuration 
{ 
    using System;
    using System.Xml; 
    using System.Configuration;
    using System.Collections.Specialized;
    using System.Collections;
    using System.Globalization; 
    using System.IO;
    using System.Text; 
    using System.ComponentModel; 
    using System.Web.Hosting;
    using System.Web.Util; 
    using System.Web.Configuration;
    using System.Web.Management;
    using System.Web.Compilation;
 
    //
    // This class is used to compare two RuleInfo object.  Basically, the array list 
    // will be sorted based on class hierachical order.  The smaller the value, the 
    // more nearer the class is to the root (WebBaseEvent), in a class inheritance sense.
    // 
    // On the other hand, if x > y, it means x is NOT a parent class of y.
    //
    // The array is sorted in this way so that if we want to find out the config setting of
    // an event class x, we start searching in a decreasing order, and the first entry (E) 
    // that satifies the test: if (x is E), then we find the right settings for x.
    // 
    // BTW, this is just a trick to save me from writing too much code.  A n-node tree 
    // method is faster, but I was too lazy.
    // 
    internal class RuleInfoComparer : IComparer{
        public int Compare(object x, object y) {
            int res;
 
            Type xType =
                ((HealthMonitoringSectionHelper.RuleInfo)x)._eventMappingSettings.RealType; 
            Type yType = 
                ((HealthMonitoringSectionHelper.RuleInfo)y)._eventMappingSettings.RealType;
 
            if (xType.Equals(yType)) {
                res = 0;
            }
            else if (xType.IsSubclassOf(yType)) { 
                res = 1;
            } 
            else if (yType.IsSubclassOf(xType)) { 
                res = -1;
            } 
            else {
                // If they're unrelated, we can't return 0 because it
                // will confuse the sorting method.
                // We can return 1 or -1, but it must be consistent. 
                return String.Compare(xType.ToString(), yType.ToString(), StringComparison.Ordinal);
            } 
 
            Debug.Trace("RuleInfoComparer", "xType=" + xType.ToString() +
                "; yType=" + yType.ToString() + "; res=" + res); 

            return res;
        }
    } 
}

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