ServiceNameCollection.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 / fx / src / security / system / security / authentication / ExtendedProtection / ServiceNameCollection.cs / 1305376 / ServiceNameCollection.cs
                        

                        
                            using System; 
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System.Collections;
using System.Diagnostics; 
using System.Diagnostics.CodeAnalysis;
 
namespace System.Security.Authentication.ExtendedProtection 
{
    // derived from ReadOnlyCollectionBase because it needs to be back ported to .Net 1.x 
    [SuppressMessage("Microsoft.Design","CA1058:TypesShouldNotExtendCertainBaseTypes", Justification="changing this would be a breaking change; this code has already shipped")]
    [Serializable]
    public class ServiceNameCollection : ReadOnlyCollectionBase
    { 
        public ServiceNameCollection(ICollection items)
        { 
            if (items == null) { 
                throw new ArgumentNullException("items");
            } 

            InnerList.AddRange(items);
        }
 
        public ServiceNameCollection Merge(string serviceName)
        { 
            ArrayList newServiceNames = new ArrayList(); // be compatible with .Net 1.x; no generics 
            newServiceNames.AddRange(this.InnerList);
 
            AddIfNew(newServiceNames, serviceName);

            ServiceNameCollection newCollection = new ServiceNameCollection(newServiceNames);
            return newCollection; 
        }
 
        public ServiceNameCollection Merge(IEnumerable serviceNames) 
        {
            ArrayList newServiceNames = new ArrayList(); // be compatible with .Net 1.x; no generics 
            newServiceNames.AddRange(this.InnerList);

            // we have a pretty bad performance here: O(n^2), but since service name lists should
            // be small (<<50) and Merge() should not be called frequently, this shouldn't be an issue 
            foreach (object item in serviceNames) {
                AddIfNew(newServiceNames, item as string); 
            } 

            ServiceNameCollection newCollection = new ServiceNameCollection(newServiceNames); 
            return newCollection;
        }

        private void AddIfNew(ArrayList newServiceNames, string serviceName) 
        {
            if (String.IsNullOrEmpty(serviceName)) { 
                throw new ArgumentException(SR.GetString(SR.security_ServiceNameCollection_EmptyServiceName)); 
            }
 
            if (!Contains(serviceName, newServiceNames)) {
                newServiceNames.Add(serviceName);
            }
        } 

        private bool Contains(string searchServiceName, ICollection serviceNames) 
        { 
            Debug.Assert(serviceNames != null);
            Debug.Assert(!String.IsNullOrEmpty(searchServiceName)); 

            bool found = false;

            foreach (string serviceName in serviceNames) { 

                if (String.Compare(serviceName, searchServiceName, 
                    StringComparison.OrdinalIgnoreCase) == 0) 
                {
                    found = true; 
                    break;
                }
            }
 
            return found;
        } 
    } 
}

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

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