public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
IEnumerable <LogLineField> fields = value as IEnumerable <LogLineField>;
if (fields != null &&
parameter != null)
{
LogLineField field = fields.FirstOrDefault(f => f.Name == parameter.ToString());
if (field != null)
{
return(field.Content);
}
return(false);
}
return(false);
}
/// <summary>
/// Receives the raw conversion pattern from the Log4Net config file, and generates the necessary <see cref="LogLineField"/> information.
/// </summary>
/// <param name="rawConversionPattern">The raw conversion pattern string.</param>
private static List <LogLineField> GenerateFieldsFromConversionPattern(string rawConversionPattern)
{
List <LogLineField> newFields = new List <LogLineField>();
List <string> fieldPatterns = new List <string>();
int startPos = 0;
bool inField = false;
for (int i = 0; i < rawConversionPattern.Length; i++)
{
if ((rawConversionPattern[i] == ' ' || i == rawConversionPattern.Length - 1) &&
inField)
{
fieldPatterns.Add(rawConversionPattern.Substring(startPos, i - startPos).Trim());
inField = false;
continue;
}
if (rawConversionPattern[i] != '%')
{
continue;
}
if (inField)
{
fieldPatterns.Add(rawConversionPattern.Substring(startPos, i - startPos).Trim());
inField = false;
}
startPos = i;
inField = true;
}
foreach (string pattern in fieldPatterns)
{
string cleanedPattern = PatternLayout.CleanConversionPatternField(pattern);
bool inPadding = false;
bool inTruncate = false;
string paddingElement = string.Empty;
string truncateElement = string.Empty;
string patternElement = string.Empty;
foreach (char c in cleanedPattern)
{
if (c == '.')
{
inPadding = false;
inTruncate = true;
continue;
}
if (Char.IsDigit(c))
{
if (!inTruncate)
{
inPadding = true;
}
else
{
truncateElement += c;
}
if (inPadding)
{
paddingElement += c;
}
continue;
}
inPadding = inTruncate = false;
patternElement += c;
}
if (string.IsNullOrEmpty(patternElement))
{
continue;
}
LogLineField newField = new LogLineField
{
Name = PatternLayout.RetrieveFieldNameFromConversionPattern(patternElement)
};
if (!string.IsNullOrEmpty(truncateElement))
{
newField.Type = LogLineType.FixedWidth;
newField.FixedWidth = int.Parse(truncateElement);
}
else
{
newField.Type = LogLineType.Delimited;
newField.EndingCharacter = ' ';
if (!string.IsNullOrEmpty(paddingElement))
{
newField.MinWidth = int.Parse(paddingElement);
}
}
newFields.Add(newField);
}
return(newFields);
}
