public IParser Build(string expression)
{
converters.Add(new MaximumNumberConverter(defaultMaxValue));
if (defaultParseNegative)
{
processors.Add(new NegativeNumberValueProcessor());
}
SimpleRegexParser simpleParser = new SimpleRegexParser(converters, processors, customDelimiter.ToString(), defaultOperation);
if (simpleParser.CanParse(expression))
{
return(simpleParser);
}
SingleCustomRegexParser singleParser = new SingleCustomRegexParser(converters, processors, customDelimiter.ToString(), defaultOperation);
if (singleParser.CanParse(expression))
{
return(singleParser);
}
MultipleCustomRegexParser multipleParser = new MultipleCustomRegexParser(converters, processors, customDelimiter.ToString(), defaultOperation);
if (multipleParser.CanParse(expression))
{
return(multipleParser);
}
SimpleOperationParser operationParser = new SimpleOperationParser(converters, processors, customDelimiter.ToString(), defaultOperation);
return(operationParser);
}
public int CalculateExpression(string expression)
{
IParser additionParser = null;
string exp = expression;
List <string> delimiters = new List <string>();
if (!string.IsNullOrEmpty(alternativeDelimiter))
{
delimiters.Add(alternativeDelimiter);
}
if (regex != null && regex.IsMatch(expression))
{
var match = regex.Match(expression);
var delims = match.Groups.Where(t => t.Name.Equals("delimiter", StringComparison.InvariantCultureIgnoreCase))
.SelectMany(t => t.Captures.Select(m => m.Value))
.ToList();
delimiters.AddRange(delims);
additionParser = new SimpleOperationParser(converters, valueProcessors, delimiters, operation);
exp = match.Groups["numbers"].Value;
}
else
{
additionParser = new SimpleOperationParser(converters, valueProcessors, delimiters, operation);
}
return(additionParser.CalculateExpression(exp));
}
