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How to use EvaluateEmpty method of NBi.Core.Transformation.Transformer.Native.Text.TextToLower class

Best NBi code snippet using NBi.Core.Transformation.Transformer.Native.Text.TextToLower.EvaluateEmpty

TextTransformations.cs

Source:TextTransformations.cs

...28        }29        protected virtual object EvaluateHighLevelString(string value)30        {31            if (string.IsNullOrEmpty(value))32                return EvaluateEmpty();33            if (value.Equals("(null)"))34                return EvaluateNull();35            if (value.Equals("(empty)") || string.IsNullOrEmpty(value))36                return EvaluateEmpty();37            if (value.Equals("(blank)") || string.IsNullOrWhiteSpace(value))38                return EvaluateBlank();39            if (value.StartsWith("(") && value.EndsWith(")"))40                return EvaluateSpecial(value);41            return EvaluateString(value as string);42        }43        protected virtual object EvaluateNull() => "(null)";44        protected virtual object EvaluateEmpty() => "(empty)";45        protected virtual object EvaluateBlank() => "(blank)";46        protected virtual object EvaluateSpecial(string value) => value;47        protected abstract object EvaluateString(string value);48    }49    class TextToHtml : AbstractTextTransformation50    {51        protected override object EvaluateString(string value) => WebUtility.HtmlEncode(value);52    }53    class TextToLower : AbstractTextTransformation54    {55        protected override object EvaluateString(string value) => value.ToLowerInvariant();56    }57    class TextToUpper : AbstractTextTransformation58    {59        protected override object EvaluateString(string value) => value.ToUpperInvariant();60    }61    class TextToTrim : AbstractTextTransformation62    {63        protected override object EvaluateBlank() => "(empty)";64        protected override object EvaluateString(string value) => value.Trim();65    }66    abstract class AbstractTextAppend : AbstractTextTransformation67    {68        public IScalarResolver<string> Append { get; }69        public AbstractTextAppend(IScalarResolver<string> append)70            => Append = append;71        protected override object EvaluateEmpty() => Append.Execute();72        protected override object EvaluateBlank() => Append.Execute();73    }74    class TextToPrefix : AbstractTextAppend75    {76        public TextToPrefix(IScalarResolver<string> prefix)77            : base(prefix) { }78        protected override object EvaluateString(string value) => $"{Append.Execute()}{value}";79    }80    class TextToSuffix : AbstractTextAppend81    {82        public TextToSuffix(IScalarResolver<string> suffix)83            : base(suffix) { }84        protected override object EvaluateString(string value) => $"{value}{Append.Execute()}";85    }86    abstract class AbstractTextLengthTransformation : AbstractTextTransformation87    {88        public IScalarResolver<int> Length { get; }89        public AbstractTextLengthTransformation(IScalarResolver<int> length)90            => Length = length;91    }92    class TextToFirstChars : AbstractTextLengthTransformation93    {94        public TextToFirstChars(IScalarResolver<int> length)95            : base(length) { }96        protected override object EvaluateString(string value)97            => value.Length >= Length.Execute() ? value.Substring(0, Length.Execute()) : value;98    }99    class TextToLastChars : AbstractTextLengthTransformation100    {101        public TextToLastChars(IScalarResolver<int> length)102            : base(length) { }103        protected override object EvaluateString(string value)104            => value.Length >= Length.Execute() ? value.Substring(value.Length - Length.Execute(), Length.Execute()) : value;105    }106    class TextToSkipFirstChars : AbstractTextLengthTransformation107    {108        public TextToSkipFirstChars(IScalarResolver<int> length)109            : base(length) { }110        protected override object EvaluateString(string value)111            => value.Length <= Length.Execute() ? "(empty)" : value.Substring(Length.Execute(), value.Length - Length.Execute());112    }113    class TextToSkipLastChars : AbstractTextLengthTransformation114    {115        public TextToSkipLastChars(IScalarResolver<int> length)116            : base(length) { }117        protected override object EvaluateString(string value)118            => value.Length <= Length.Execute() ? "(empty)" : value.Substring(0, value.Length - Length.Execute());119    }120    abstract class AbstractTextPadTransformation : AbstractTextLengthTransformation121    {122        public IScalarResolver<char> Character { get; }123        public AbstractTextPadTransformation(IScalarResolver<int> length, IScalarResolver<char> character)124            : base(length)125            => Character = character;126        protected override object EvaluateEmpty() => new string(Character.Execute(), Length.Execute());127        protected override object EvaluateNull() => new string(Character.Execute(), Length.Execute());128    }129    class TextToPadRight : AbstractTextPadTransformation130    {131        public TextToPadRight(IScalarResolver<int> length, IScalarResolver<char> character)132            : base(length, character) { }133        protected override object EvaluateString(string value)134            => value.Length >= Length.Execute() ? value : value.PadRight(Length.Execute(), Character.Execute());135    }136    class TextToPadLeft : AbstractTextPadTransformation137    {138        public TextToPadLeft(IScalarResolver<int> length, IScalarResolver<char> character)139            : base(length, character) { }140        protected override object EvaluateString(string value)141            => value.Length >= Length.Execute() ? value : value.PadLeft(Length.Execute(), Character.Execute());142    }143    class BlankToEmpty : AbstractTextTransformation144    {145        protected override object EvaluateBlank() => "(empty)";146        protected override object EvaluateString(string value) => value;147    }148    class BlankToNull : AbstractTextTransformation149    {150        protected override object EvaluateBlank() => "(null)";151        protected override object EvaluateEmpty() => "(null)";152        protected override object EvaluateString(string value) => value;153    }154    class EmptyToNull : AbstractTextTransformation155    {156        protected override object EvaluateEmpty() => "(null)";157        protected override object EvaluateString(string value) => value;158    }159    class NullToEmpty : AbstractTextTransformation160    {161        protected override object EvaluateNull() => "(empty)";162        protected override object EvaluateString(string value) => value;163    }164    class HtmlToText : AbstractTextTransformation165    {166        protected override object EvaluateString(string value) => WebUtility.HtmlDecode(value);167    }168    class TextToLength : AbstractTextTransformation169    {170        protected override object EvaluateSpecial(string value) => -1;171        protected override object EvaluateBlank() => -1;172        protected override object EvaluateEmpty() => 0;173        protected override object EvaluateNull() => 0;174        protected override object EvaluateString(string value) => value.Length;175    }176    class TextToToken : AbstractTextTransformation177    {178        public IScalarResolver<int> Index { get; }179        public IScalarResolver<char> Separator { get; }180        public TextToToken(IScalarResolver<int> index)181            => (Index, Separator) = (index, null);182        public TextToToken(IScalarResolver<int> index, IScalarResolver<char> separator)183            => (Index, Separator) = (index, separator);184        protected override object EvaluateBlank() => Separator == null || char.IsWhiteSpace(Separator.Execute()) ? "(null)" : "(blank)";185        protected override object EvaluateEmpty() => "(null)";186        protected override object EvaluateString(string value)187        {188            var tokenizer = Separator == null ? (ITokenizer)new WhitespaceTokenizer() : new Tokenizer(Separator.Execute());189            var tokens = tokenizer.Execute(value);190            var indexValue = Index.Execute();191            if (indexValue < tokens.Length)192                return tokens[indexValue];193            else194                return "(null)";195        }196    }197    class TextToTokenCount : TextToLength198    {199        public IScalarResolver<char> Separator { get; }200        public TextToTokenCount()201            => Separator = null;202        public TextToTokenCount(IScalarResolver<char> separator)203            => Separator = separator;204        protected override object EvaluateBlank() => 0;205        protected override object EvaluateString(string value) => TokenCount(value);206        private int TokenCount(string value)207        {208            var tokenizer = Separator == null ? (ITokenizer)new WhitespaceTokenizer() : new Tokenizer(Separator.Execute());209            return tokenizer.Execute(value).Count();210        }211    }212    class TextToDateTime : AbstractTextTransformation213    {214        public IScalarResolver<string> Format { get; }215        public IScalarResolver<string> Culture { get; }216        public TextToDateTime(IScalarResolver<string> format)217            => (Format, Culture) = (format, new LiteralScalarResolver<string>(string.Empty));218        public TextToDateTime(IScalarResolver<string> format, IScalarResolver<string> culture)219            => (Format, Culture) = (format, culture);220        protected override object EvaluateString(string value)221        {222            var info = (string.IsNullOrEmpty(Culture.Execute()) ? CultureInfo.InvariantCulture : new CultureInfo(Culture.Execute())).DateTimeFormat;223            if (DateTime.TryParseExact(value, Format.Execute(), info, DateTimeStyles.RoundtripKind, out var dateTime))224                return DateTime.SpecifyKind(dateTime, DateTimeKind.Unspecified);225            throw new NBiException($"Impossible to transform the value '{value}' into a date using the format '{Format}'");226        }227    }228    class TextToRemoveChars : AbstractTextTransformation229    {230        public IScalarResolver<char> CharToRemove { get; }231        public TextToRemoveChars(IScalarResolver<char> charToRemove)232            => CharToRemove = charToRemove;233        protected override object EvaluateString(string value)234        {235            var stringBuilder = new StringBuilder();236            foreach (var c in value)237                if (!c.Equals(CharToRemove.Execute()))238                    stringBuilder.Append(c);239            return stringBuilder.ToString();240        }241        protected override object EvaluateBlank()242        {243            if (char.IsWhiteSpace(CharToRemove.Execute()))244                return "(empty)";245            else246                return base.EvaluateBlank();247        }248    }249    class TextToMask : AbstractTextTransformation250    {251        private char maskChar { get; } = '*';252        public IScalarResolver<string> Mask { get; }253        public TextToMask(IScalarResolver<string> mask)254            => Mask = mask;255        protected override object EvaluateString(string value)256        {257            var mask = Mask.Execute();258            var stringBuilder = new StringBuilder();259            var index = 0;260            foreach (var c in mask)261                if (c.Equals(maskChar))262                    stringBuilder.Append(index < value.Length ? value[index++] : maskChar);263                else264                    stringBuilder.Append(c);265            return stringBuilder.ToString();266        }267        protected override object EvaluateBlank()268            => Mask.Execute();269        protected override object EvaluateEmpty()270            => Mask.Execute();271    }272    class MaskToText : AbstractTextTransformation273    {274        private char maskChar { get; } = '*';275        public IScalarResolver<string> Mask { get; }276        public MaskToText(IScalarResolver<string> mask)277            => Mask = mask;278        protected override object EvaluateString(string value)279        {280            var mask = Mask.Execute();281            var stringBuilder = new StringBuilder();282            if (mask.Length != value.Length)283                return "(null)";284            for (int i = 0; i < mask.Length; i++)285                if (mask[i].Equals(maskChar) && !value[i].Equals(maskChar))286                    stringBuilder.Append(value[i]);287                else if (!mask[i].Equals(value[i]))288                    return "(null)";289            return stringBuilder.ToString();290        }291        protected override object EvaluateBlank()292            => (Mask.Execute().Replace(maskChar.ToString(), "").Length == 0) ? "(blank)" : "(null)";293        protected override object EvaluateEmpty()294            => (Mask.Execute().Replace(maskChar.ToString(), "").Length == 0) ? "(empty)" : "(null)";295    }296}...

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