Integrating WCF Services into UDDI based enterprise SOA

using System;
using System.Collections;
using System.Configuration;
using System.Linq;

namespace DynamicWCFFactory
{
    /// <summary>
    /// Provides methods to retrieve a <see cref="ServiceDiscoveryConfigurationSection"/> section
    /// from the application configuration file.
    /// </summary>
    public class ServiceDiscoveryConfigurationHelper
    {
        #region Fields

        /// <summary>
        /// The configuration from the application configuration file.
        /// </summary>
        private System.Configuration.Configuration _appConfig = null;

        #endregion

        #region Internal methods

        /// <summary>
        /// Returns all the configuration groups of the given type.
        /// </summary>
        /// <typeparam name="T">The type of the configuration section group to return</typeparam>
        /// <returns>A <see cref="ConfigurationSectionGroup"/> matching the given type.</returns>
        internal IEnumerable Group<T>() where T : class, new()
        {
            // Selectively retrieve the requested configuration sections.
            IEnumerable _groupQuery = _appConfig.SectionGroups.OfType<T>();
            foreach (ConfigurationSectionGroup _group in _groupQuery)
            {
                // Return the result to the caller.
                yield return _group;
            }
        }

        /// <summary>
        /// Returns all the configuration sections of the given type matching the given name.
        /// </summary>
        /// <typeparam name="T">The type of the sections to return.</typeparam>
        /// <param name="sectionName">The name of the section searched for.</param>
        /// <returns>A <see cref="ConfigurationSection"/> matching the given parameters.</returns>
        internal T Section<T>(string sectionName) where T : ServiceDiscoveryConfigurationSection
        {
            // Browse through all configuration groups.
            foreach (ConfigurationSectionGroup _group in _appConfig.SectionGroups)
            {
                // Selectively retrieve the requested configuration sections.
                IEnumerable _sectionQuery = _group.Sections.OfType<T>();
                foreach (T _section in _sectionQuery)
                {
                    // If the name of the section matches the given section name.
                    if (StringComparer.OrdinalIgnoreCase.Equals(_section.Name, sectionName))
                    {
                        // Return the result to the caller.
                        return _section as T;
                    }
                }
            }
            return default(T);
        }

        /// <summary>
        /// Returns all the configuration sections of the given type.
        /// </summary>
        /// <typeparam name="T">The type of the configuration section to return</typeparam>
        /// <returns>A <see cref="ConfigurationSection"/> matching the given type.</returns>
        internal IEnumerable Section<T>() where T : ServiceDiscoveryConfigurationSection
        {
            // Browse through all configuration groups.
            foreach (ConfigurationSectionGroup _group in _appConfig.SectionGroups)
            {
                // Selectively retrieve the requested configuration sections.
                IEnumerable _sectionQuery = _group.Sections.OfType<T>();
                foreach (ConfigurationSection _section in _sectionQuery)
                {
                    // Return the result to the caller.
                    yield return _section;
                }
            }
        }

        #endregion

        #region Public methods

        /// <summary>
        /// Returns a <see cref="ServiceDiscoveryConfigurationSection"/> matching the given name.
        /// </summary>
        /// <param name="name">The name of the <see cref="ServiceDiscoveryConfigurationSection"/> to return.</param>
        /// <returns>The <see cref="ServiceDiscoveryConfigurationSection"/> matching the given name.</returns>
        public ServiceDiscoveryConfigurationSection Section(string name)
        {
            // Browse through all configuration groups.
            foreach (ConfigurationSectionGroup _sectionGroups in _appConfig.SectionGroups)
            {
                // Return the first configuration section matching the given name.
                var _section = (from _sections in _sectionGroups.Sections.OfType<ServiceDiscoveryConfigurationSection>()
                                where _sections.Name == name
                                select _sections).FirstOrDefault();
                if (null!=_section)
                    return _section;
            }
            return null;
        }

        #endregion

        #region Ctor

        /// <summary>
        /// Initializes a new instance of the ServiceDiscoveryConfigurationHelper class.
        /// </summary>
        public ServiceDiscoveryConfigurationHelper()
        {
            // Get the application configuration file.
            _appConfig = ConfigurationAgent.OpenExeConfiguration(ConfigurationUserLevel.None);
        }

        #endregion
    }
}