Ejemplo n.º 1
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        public UnknownFeatureIonInstanceSpectrumChartDataProvider(IEntityDataService entityDataService, IEnumerable <EntityItemData> entityItemData)
        {
            ArgumentHelper.AssertNotNull(entityItemData, "entityItemData");

            m_entityDataService = entityDataService;

            var entityReader            = entityDataService.CreateEntityItemReader();
            var compoundIonInstanceItem = entityReader.Read <UnknownFeatureIonInstanceItem>(entityItemData.First().GetEntityIds());

            // make spectrum header
            m_extraHeaderLine = String.Format(
                "Ion: {0}, m/z: {1:F5}, Area: {2:F0}",
                compoundIonInstanceItem.IonDescription,
                compoundIonInstanceItem.Mass,
                compoundIonInstanceItem.Area);

            // set ion
            m_unknownFeatureIonInstanceItems = new[] { compoundIonInstanceItem };

            // get reader
            entityReader = entityDataService.CreateEntityItemReader();
            m_fileNames  = entityReader.ReadAll <WorkflowInputFile>().ToDictionary(file => file.FileID, file => Path.GetFileNameWithoutExtension(file.FileName));

            // load related chromatographic peak items
            var peakItems = entityReader.ReadFlat <UnknownFeatureIonInstanceItem, ChromatogramPeakItem>(compoundIonInstanceItem).Item2;

            m_chromatogramPeakItemsMap = new Dictionary <object[], IList <ChromatogramPeakItem> >(IdArrayComparer.Instance)
            {
                { compoundIonInstanceItem.GetIDs(), peakItems }
            };

            // load related spectrum tree
            SpectralTreeNodes = LoadSpectralTree();
        }
Ejemplo n.º 2
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        public EventDispatcher(Type serviceType, Type baseType)
        {
            ArgumentHelper.AssertNotNull <Type>(serviceType, "service");
            ArgumentHelper.AssertNotNull <Type>(baseType, "baseType");

            subject = EventSubject.GetObject(baseType, serviceType);
        }
Ejemplo n.º 3
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        /// <summary>
        /// One of the connected nodes sent all of its data.
        /// </summary>
        public override void OnParentNodeFinished(IProcessingNode sender, ResultsArguments eventArgs)
        {
            ArgumentHelper.AssertNotNull(eventArgs, "eventArgs");

            try
            {
                SendAndLogTemporaryMessage("⇒ {0} started...", DisplayName);
                var timer = Stopwatch.StartNew();

                // generate expected lipids
                var lipids = GenerateLipids();

                // send lipids to child nodes
                SendResults(lipids);

                timer.Stop();
                SendAndLogMessage("✓ {0} finished after {1}.", DisplayName, StringHelper.GetDisplayString(timer.Elapsed));
            }
            catch (Exception ex)
            {
                SendAndLogErrorMessage("Error: " + ex.Message);
                throw;
            }

            // inform child nodes that processing has finished
            FireProcessingFinishedEvent(new ResultsArguments(LipidSearchDataTypes.LipidCompounds));
        }
Ejemplo n.º 4
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        public async Task SetMetadata(ImageMetadata metadata, CancellationToken cancellationToken)
        {
            ArgumentHelper.AssertNotNull(nameof(metadata), metadata);
            ArgumentHelper.AssertNotNullOrEmpty(nameof(metadata.Id), metadata.Id);
            ArgumentHelper.AssertNotNullOrEmpty(nameof(metadata.PartitionKey), metadata.PartitionKey);
            ArgumentHelper.AssertNotNullOrEmpty(nameof(metadata.MimeType), metadata.MimeType);
            ArgumentHelper.AssertNotNullOrEmpty(nameof(metadata.MD5Hash), metadata.MD5Hash);
            if (metadata.SizeBytes <= 0)
            {
                throw new ArgumentOutOfRangeException(nameof(metadata.SizeBytes));
            }
            if (metadata.Width <= 0)
            {
                throw new ArgumentOutOfRangeException(nameof(metadata.Width));
            }
            if (metadata.Height <= 0)
            {
                throw new ArgumentOutOfRangeException(nameof(metadata.Height));
            }

            var container = await GetContainer();

            await container.UpsertItemAsync(metadata, new PartitionKey(metadata.PartitionKey), cancellationToken : cancellationToken)
            .ConfigureAwait(false);
        }
Ejemplo n.º 5
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        /// <summary>
        /// 获取指定路径的节点的值
        /// </summary>
        /// <param name="path">路径名称</param>
        /// <returns>如果存在的话返回指定路径节点下的值,否则返回空字符串</returns>
        public string GetItemValue(string path)
        {
            ArgumentHelper.AssertNotNull <string>(path, "path");
            path = EncodePath(path);
            XmlNode node = xml.SelectSingleNode(RootPath + path);

            return(node == null ? string.Empty : node.InnerText);
        }
Ejemplo n.º 6
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        public int Add(TemplateMappingInfo info)
        {
            ArgumentHelper.AssertNotNull(info, "TemplateMappingInfo is null");
            ArgumentHelper.AssertNotNullOrEmpty(info.AppId, "TemplateMappingInfo.appId is null");
            ArgumentHelper.AssertNotNullOrEmpty(info.TemplateIdShort, "TemplateMappingInfo.TemplateIdShort is null");
            ArgumentHelper.AssertNotNullOrEmpty(info.TemplateId, "TemplateMappingInfo.TemplateId is null");

            return(TemplateMappingDao.Insert(info));
        }
 /// <summary>
 /// Sums the intensity of trace points, if the <see cref="TracePoint.SpectrumID"/> is the same.
 /// This method can be used to sum traces having the same raster.
 /// </summary>
 /// <param name="items">An enumeration of trace points.</param>
 public static IEnumerable <TracePoint> SumPoints(this IEnumerable <TracePoint> items)
 {
     // ReSharper disable PossibleMultipleEnumeration
     ArgumentHelper.AssertNotNull(items, "items");
     return(items
            .GroupBy(g => g.SpectrumID)
            .Select(s => new TracePoint(s.Key, s.First().Time, s.Sum(sum => sum.Intensity), s.Max(m => m.MaxNoise))));
     // ReSharper restore PossibleMultipleEnumeration
 }
        public void assert_not_null_does_not_throw_if_enumerable_contains_null_but_checking_for_null_items_is_disabled()
        {
            var list = new List <string>
            {
                string.Empty,
                null
            };

            ArgumentHelper.AssertNotNull(list, "test", false);
        }
Ejemplo n.º 9
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        /// <summary>
        /// 获取指定路径、指定节点名称的节点
        /// </summary>
        /// <param name="path">路径名称</param>
        /// <param name="item">属性名称</param>
        /// <returns>如果存在的话返回指定路径下的节点,否则返回null</returns>
        public XmlNode GetItem(string path, KeyValuePair <string, string> item)
        {
            ArgumentHelper.AssertNotNull <string>(path, "path");
            ArgumentHelper.AssertNotNull <string>(item.Key, "item.Key");
            ArgumentHelper.AssertNotNull <string>(item.Value, "item.Value");
            path = EncodePath(path);
            XmlNode node = xml.SelectSingleNode(RootPath + path);

            return(node == null ? null : node.SelectSingleNode("[" + item.Key + "='" + item.Value + "']"));
        }
Ejemplo n.º 10
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        /// <summary>
        /// 增加绑定批次
        /// </summary>
        /// <param name="tenantId"></param>
        /// <param name="info"></param>
        /// <returns></returns>
        public int Add(int tenantId, BindBatchInfo info)
        {
            ArgumentHelper.AssertIsTrue(tenantId > 0, "tenantId is 0");
            ArgumentHelper.AssertNotNull(info, "info is null");
            ArgumentHelper.AssertIsTrue(info.TenantId > 0, "info.TenantId is 0");
            ArgumentHelper.AssertIsTrue(info.AppUserAccountId > 0, "info.AppUserAccountId is 0");
            ArgumentHelper.AssertNotNullOrEmpty(info.BeisenAccount, "info.BeisenAccount is null");

            return(BindBatchDao.Insert(tenantId, info));
        }
Ejemplo n.º 11
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        /// <summary>
        /// 判断路径是否存在
        /// </summary>
        /// <param name="path">路径名称</param>
        /// <returns>如果存在的话返回true,否则返回false</returns>
        public bool Exists(string path)
        {
            ArgumentHelper.AssertNotNull <string>(path, "path");
            path = path.Trim();
            string nodepath = EncodePath(path);

            XmlNode node = xml.SelectSingleNode(RootPath + nodepath);

            return(node != null);
        }
Ejemplo n.º 12
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        public ImageBlobAzureStorage(ImageAzureStorageConfiguration configuration)
        {
            ArgumentHelper.AssertNotNull(nameof(configuration), configuration);

            var storageAccount = CloudStorageAccount.Parse(configuration.ConnectionString);

            _cloudBlobClient = storageAccount.CreateCloudBlobClient();

            _imagesContainer     = new Lazy <CloudBlobContainer>(() => CreateCloudBlobContainer(configuration.ImagesContainerName.ToLowerInvariant()));
            _thumbnailsContainer = new Lazy <CloudBlobContainer>(() => CreateCloudBlobContainer(configuration.ThumbnailsContainerName.ToLowerInvariant()));
        }
Ejemplo n.º 13
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        public ImageResizingResult Resize(Stream imageStream, ImageType imageType, int targetWidth)
        {
            ArgumentHelper.AssertNotNull(nameof(imageStream), imageStream);

            imageStream.Position = 0;

            IImageFormat imageFormat = PngFormat.Instance;

            switch (imageType)
            {
            case ImageType.PNG:
                imageFormat = PngFormat.Instance;
                break;

            case ImageType.JPEG:
                imageFormat = JpegFormat.Instance;
                break;

            case ImageType.BMP:
                imageFormat = BmpFormat.Instance;
                break;

            case ImageType.GIF:
                imageFormat = GifFormat.Instance;
                break;
            }

            using var image = Image.Load(imageStream);

            decimal divisor      = (decimal)image.Width / targetWidth;
            var     targetHeight = Convert.ToInt32(Math.Round(image.Height / divisor));

            image.Mutate(x => x
                         .Resize(new ResizeOptions
            {
                Size = new Size(targetWidth, targetHeight),
                Mode = ResizeMode.Max
            }));

            MemoryStream resultStream = new MemoryStream();

            image.Save(resultStream, imageFormat);
            return(new ImageResizingResult
            {
                Image = resultStream,
                Size = new ImageSize
                {
                    Bytes = resultStream.Length,
                    Width = image.Width,
                    Height = image.Height
                }
            });
        }
Ejemplo n.º 14
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        /// <summary>
        /// 获取指定节点名称的路径信息
        /// </summary>
        /// <param name="item">节点名称</param>
        /// <returns>如果找到节点返回节点的路径,否则返回null</returns>
        public string SearchNode(string item)
        {
            ArgumentHelper.AssertNotNull <string>(item, "item");
            item = EncodeNodeName(item.Trim());

            XmlNode node = xml.SelectSingleNode("//" + item);

            if (node == null)
            {
                return(null);
            }
            return(GetXPath(node));
        }
Ejemplo n.º 15
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        /// <summary>
        /// 获取指定路径下所有的子节点
        /// </summary>
        /// <param name="path">路径名称</param>
        /// <returns>如果存在的话返回指定路径下的所有节点列表,否则返回null</returns>
        public XmlNodeList GetChildren(string path)
        {
            ArgumentHelper.AssertNotNull <string>(path, "path");
            path = EncodePath(path);

            XmlNode node = xml.SelectSingleNode(RootPath + path);

            if (node == null)
            {
                return(null);
            }
            return(node.SelectNodes("*"));
        }
        /// <summary>
        /// 增加用户账户
        /// </summary>
        /// <param name="tenantId"></param>
        /// <param name="appUserAccountInfo"></param>
        public int AddOrUpdate(int tenantId, AppUserAccountInfo appUserAccountInfo)
        {
            ArgumentHelper.AssertIsTrue(tenantId > 0, "tenantId is 0");
            ArgumentHelper.AssertNotNull(appUserAccountInfo, "appUserAccountInfo is null");
            ArgumentHelper.AssertNotNullOrEmpty(appUserAccountInfo.AppId, "appUserAccountInfo.appId is null");
            ArgumentHelper.AssertNotNullOrEmpty(appUserAccountInfo.OpenId, "appUserAccountInfo.openId is null");
            ArgumentHelper.AssertIsTrue(appUserAccountInfo.TenantId > 0, "appUserAccountInfo.TenantId is 0");
            ArgumentHelper.AssertIsTrue(appUserAccountInfo.UserId > 0, "appUserAccountInfo.UserId is 0");
            var sqlId = AppUserAccountDao.InsertOrUpdate(tenantId, appUserAccountInfo);

            AppUserAccountDao.AddOrUpdateCLoud(tenantId, sqlId, appUserAccountInfo);
            return(sqlId);
        }
Ejemplo n.º 17
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        public static string LowerCaseFirstLetter(this string input)
        {
            ArgumentHelper.AssertNotNull(input, nameof(input));

            if (input.Length == 0)
            {
                return(input);
            }

            var arr = input.ToCharArray();

            arr[0] = char.ToLowerInvariant(arr[0]);

            return(new string(arr));
        }
Ejemplo n.º 18
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        private string GetDingTalkPCUrl(int tenantId, string appaccount_id, string app_id, string return_url)
        {
            ArgumentHelper.AssertPositive(tenantId, "GetDingTalkPCUrl tenantId is not positive");
            ArgumentHelper.AssertNotNull(appaccount_id, "GetDingTalkPCUrl appaccount_id is null");
            ArgumentHelper.AssertNotNull(app_id, "GetDingTalkPCUrl app_id is null");
            if (string.IsNullOrEmpty(return_url))
            {
                return(null);
            }
            var    encodeRedirectUrl = HttpUtility.UrlEncode(string.Format("{0}?return_url={1}", AppConnectHostConfig.Cache[2], HttpUtility.UrlEncode(return_url)));
            string redirectUrl       = string.Format("{0}/user/authorizeformsg?tenant_id={1}&appaccount_id={2}&app_id={3}&login_type=0&redirect_url={4}", AppConnectHostConfig.Cache[0], tenantId, appaccount_id, app_id, encodeRedirectUrl);

            AppConnectLogHelper.DebugFormat("PC端拼接后详情页RedirectUrl:{0}", redirectUrl);
            return(redirectUrl);
        }
Ejemplo n.º 19
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        public override SpectrumChartData CreateSpectrumDetails(MassSpectrumItem massSpectrumItem, MassSpectrum referenceSpectrum = null)
        {
            ArgumentHelper.AssertNotNull(massSpectrumItem, "massSpectrumItem");

            // clone given spectrum
            var spectrum = massSpectrumItem.Spectrum.Clone();

            if (spectrum == null)
            {
                return(null);
            }

            //// get ions for respective polarity
            //var ions = spectrum.ScanEvent.Polarity == PolarityType.Negative
            //	? m_unknownFeatureIonInstanceItems.Where(w => w.Charge < 0)
            //	: m_unknownFeatureIonInstanceItems.Where(w => w.Charge > 0);

            // annotate nearest centroids
            foreach (var ion in m_unknownFeatureIonInstanceItems)
            {
                // annotate isotopes
                foreach (var peak in m_chromatogramPeakItemsMap[ion.GetIDs()])
                {
                    var centroid = spectrum.PeakCentroids.FindClosestPeak(peak.Mass);
                    if (centroid != null)
                    {
                        centroid.DisplayPriority = 2;
                    }
                }
            }

            // create spectrum chart data
            var massRange = Range.Create(spectrum.Header.LowPosition, spectrum.Header.HighPosition);

            if (spectrum.ScanEvent.MSOrder == MSOrderType.MS1)
            {
                var peaks = m_chromatogramPeakItemsMap.SelectMany(s => s.Value).ToList();
                massRange = Range.Create(Math.Max(0, peaks.Min(m => m.Mass)) - 4, peaks.Max(m => m.Mass) + 5);
            }

            return(new SpectrumChartData {
                MassRange = massRange,
                SpectrumDistanceDetails = null,
                Spectrum = spectrum,
                SpectrumHeaderText = CreateSpectrumChartHeader(spectrum, m_extraHeaderLine, m_fileNames[spectrum.Header.FileID])
            });
        }
Ejemplo n.º 20
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        /// <summary>
        /// 检查指定路径下是否含有子节点
        /// </summary>
        /// <param name="path">路径名称</param>
        /// <returns>如果存在的话返回true,否则返回false</returns>
        public bool HasChildren(string path)
        {
            ArgumentHelper.AssertNotNull <string>(path, "path");
            path = path.Trim();
            string nodepath = EncodePath(path);

            XmlNode node = xml.SelectSingleNode(RootPath + nodepath);

            if (node == null)
            {
                throw new ArgumentException("无法在配置树中找到节点" + path, "path");
            }

            XmlNodeList subItems = node.SelectNodes("*");

            return(subItems.Count > 0);
        }
Ejemplo n.º 21
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        public static bool TryRead <T>(XmlNode parentNode, string attributeName, Converter <string, T> converter, ref T value)
        {
            ArgumentHelper.AssertNotNull <XmlNode>(parentNode, "parentNode");
            ArgumentHelper.AssertNotEmpty(attributeName, "attributeName");
            ArgumentHelper.AssertNotNull <Converter <string, T> >(converter, "converter");

            XmlAttribute attr = parentNode.Attributes[attributeName];

            if (null == attr)
            {
                return(false);
            }
            else
            {
                value = converter(attr.Value);
                return(true);
            }
        }
Ejemplo n.º 22
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        /// <summary>
        /// 检查指定路径的节点是否存在
        /// </summary>
        /// <param name="path">路径名称</param>
        /// <param name="item">节点名称</param>
        /// <returns>如果存在的话返回true,否则返回false</returns>
        public bool Exists(string path, string item)
        {
            ArgumentHelper.AssertNotNull <string>(path, "path");
            path = path.Trim();
            string nodepath = EncodePath(path);

            ArgumentHelper.AssertNotNull <string>(item, "item");
            item = item.Trim();
            XmlNode node = xml.SelectSingleNode(RootPath + nodepath);

            if (node == null)
            {
                return(false);
            }

            XmlNode subItem = node.SelectSingleNode("*[name()='" + item + "']");

            return(subItem != null);
        }
Ejemplo n.º 23
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        public ImageSize ReadSize(Stream imageStream)
        {
            ArgumentHelper.AssertNotNull(nameof(imageStream), imageStream);

            imageStream.Position = 0;

            var identify = Image.Identify(imageStream);

            if (identify == null)
            {
                return(null);
            }

            return(new ImageSize
            {
                Bytes = imageStream.Length,
                Width = identify.Width,
                Height = identify.Height
            });
        }
Ejemplo n.º 24
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        public async Task <UploadImageResult> UploadImage(string imageName, Stream imageStream, ImageSizeType imageSizeType,
                                                          string imageContentType, CancellationToken cancellationToken)
        {
            ArgumentHelper.AssertNotNullOrEmpty(nameof(imageName), imageName);
            ArgumentHelper.AssertNotNull(nameof(imageStream), imageStream);

            var blockBlob = GetBlockBlob(imageName, imageSizeType);

            blockBlob.Properties.ContentType = imageContentType;

            imageStream.Position = 0;
            await blockBlob.UploadFromStreamAsync(imageStream, cancellationToken).ConfigureAwait(false);

            return(new UploadImageResult
            {
                MD5Hash = blockBlob.Properties.ContentMD5,
                DateAdded = blockBlob.Properties.Created ?? DateTimeOffset.Now,
                Url = blockBlob.Uri
            });
        }
        public void assert_not_null_throws_if_enumerable_contains_null_and_checking_for_null_items_is_enabled()
        {
            var listOfClassType = new List <string>
            {
                string.Empty,
                null
            };
            var ex = Assert.Throws <ArgumentException>(() => ArgumentHelper.AssertNotNull(listOfClassType, "test", true));

            Assert.Equal("An item inside the enumeration was null." + Environment.NewLine + "Parameter name: test", ex.Message);

            var listOfInterfaceType = new List <IDisposable>
            {
                new StringReader(""),
                null
            };

            ex = Assert.Throws <ArgumentException>(() => ArgumentHelper.AssertNotNull(listOfInterfaceType, "test", true));
            Assert.Equal("An item inside the enumeration was null." + Environment.NewLine + "Parameter name: test", ex.Message);
        }
Ejemplo n.º 26
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        /// <summary>
        /// 获取指定路径的节点的属性信息
        /// </summary>
        /// <param name="path">路径名称</param>
        /// <param name="attribute">属性名称</param>
        /// <returns>如果存在的话返回指定属性的值,否则返回空字符串</returns>
        public string GetItemAttribute(string path, string attribute)
        {
            ArgumentHelper.AssertNotNull <string>(path, "path");
            ArgumentHelper.AssertNotNull <string>(attribute, "attribute");

            path = EncodePath(path);
            XmlNode node = xml.SelectSingleNode(RootPath + path);

            if (node == null)
            {
                return(string.Empty);
            }

            for (int i = 0; i < node.Attributes.Count; i++)
            {
                if (node.Attributes.Item(i).Name.ToLower() == attribute.ToLower())
                {
                    return(node.Attributes.Item(i).Value);
                }
            }
            return(string.Empty);
        }
Ejemplo n.º 27
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        private static void SendMessage(int tenantId, AddMessageModel model)
        {
            ArgumentHelper.AssertNotNull(model);
            ArgumentHelper.AssertPositive(tenantId);
            ArgumentHelper.AssertPositive(model.FromUserId);

            string url = string.Format(TitaApiUrl + "/api/v1/{0}/{1}/message", tenantId, model.FromUserId);

            try
            {
                var resultStr = HttpClientHelper.HttpPost(url, model);
                var result    = JsonConvert.DeserializeObject <ApiResult <object> >(resultStr);
                if (result.code != 0)
                {
                    AppConnectLogHelper.ErrorFormat("Tita发送消息接口出错!租户:{0},发送人:{1}", tenantId, model.FromUserId);
                }
            }
            catch (Exception ex)
            {
                AppConnectLogHelper.ErrorFormat("发送消息出错!接口Url:{0},租户:{1},发送人:{2},异常信息:{3}", url, tenantId, model.FromUserId, JsonConvert.SerializeObject(ex));
            }
        }
Ejemplo n.º 28
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        /*
         * Using of partitions make search requests more efficient
         * https://docs.microsoft.com/en-us/azure/cosmos-db/partitioning-overview
         */

        public async Task <List <ImageMetadata> > GetMetadata(ICollection <string> imageIds, string partitionKey,
                                                              CancellationToken cancellationToken)
        {
            ArgumentHelper.AssertNotNull(nameof(imageIds), imageIds);
            if (imageIds.Count < 1)
            {
                throw new ArgumentException("Please provide at least one image id");
            }

            var container = await GetContainer();

            QueryRequestOptions queryRequestOptions = null;

            if (!string.IsNullOrEmpty(partitionKey))
            {
                queryRequestOptions = new QueryRequestOptions
                {
                    PartitionKey = new PartitionKey(partitionKey)
                }
            }
            ;

            var queryIterator = container
                                .GetItemLinqQueryable <ImageMetadata>(requestOptions: queryRequestOptions)
                                .Where(x => imageIds.Contains(x.Id))
                                .ToFeedIterator();

            List <ImageMetadata> result = new List <ImageMetadata>();

            while (queryIterator.HasMoreResults)
            {
                FeedResponse <ImageMetadata> response = await queryIterator.ReadNextAsync(cancellationToken);

                result.AddRange(response);
            }

            return(result);
        }
Ejemplo n.º 29
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        public ImageFormat DetectFormat(Stream imageStream)
        {
            ArgumentHelper.AssertNotNull(nameof(imageStream), imageStream);

            imageStream.Position = 0;

            var imageFormat = Image.DetectFormat(imageStream);

            if (imageFormat == null)
            {
                return(null);
            }

            ImageType imageType;

            if (imageFormat is PngFormat)
            {
                imageType = ImageType.PNG;
            }
            else if (imageFormat is JpegFormat)
            {
                imageType = ImageType.JPEG;
            }
            else if (imageFormat is GifFormat)
            {
                imageType = ImageType.GIF;
            }
            else if (imageFormat is BmpFormat)
            {
                imageType = ImageType.BMP;
            }
            else
            {
                throw new NotSupportedException($"Image format {imageFormat.Name} is not supported");
            }

            return(new ImageFormat(imageFormat.DefaultMimeType, imageFormat.FileExtensions.First(), imageType));
        }
Ejemplo n.º 30
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        public static T Read <T>(XmlNode parentNode, string attributeName, Converter <string, T> converter, T defaultValue, bool throwExceptionIfMissing)
        {
            ArgumentHelper.AssertNotNull <XmlNode>(parentNode, "parentNode");
            ArgumentHelper.AssertNotEmpty(attributeName, "attributeName");
            ArgumentHelper.AssertNotNull <Converter <string, T> >(converter, "converter");

            XmlAttribute attr = parentNode.Attributes[attributeName];

            if (null == attr)
            {
                if (throwExceptionIfMissing)
                {
                    throw new ConfigurationErrorsException("Missing @" + attributeName + " attribute. This value should is required.", parentNode);
                }
                else
                {
                    return(defaultValue);
                }
            }
            else
            {
                return(converter(attr.Value));
            }
        }