/// <summary>
/// Add the given multiple of mf into to.
/// </summary>
/// <param name="to"></param>
/// <param name="mf"></param>
/// <param name="multiple"></param>
private void Add(MolecularFormula to, MolecularFormula mf, int multiple)
{
foreach (String s in mf.elementCounts.Keys)
{
to.Add(s, ((int)mf.elementCounts[s]) * multiple);
}
}
public static MolecularFormula Parse(String formula, String name, bool allowNegatives)
{
if (formula == null)
{
throw new ArgumentNullException("formula");
}
var match = parsingRegex.Match(formula);
if (!match.Success)
{
throw new ApplicationException("Formula can not be parsed");
}
var mf = new MolecularFormula();
var matched = match.Groups["element"].Captures.Count;
//Console.WriteLine("Num Groups {0}", matched);
// Iterate through the matched groups, updating element counts
for (var i = 0; i < matched; i++)
{
var element = match.Groups["element"].Captures[i].Value;
var count = match.Groups["count"].Captures[i].Value;
//Console.WriteLine("Element {0}, Count {1}", element, count);
// If the symbol is unknown, throw an exception.
// The multiple defaults to 1 if not found. So CHHCHH is C2 H4.
var multiple = 1;
if (count != "")
{
try
{
multiple = int.Parse(count);
if (multiple < 0 && !allowNegatives)
{
throw new ApplicationException("Negative multiple " + multiple + " for element " +
element + " is not allowed.");
}
}
// This can never actually happen, because the regex makes sure that
// only integer values which can be parsed make it to this stage
catch (Exception ex)
{
throw new ApplicationException("The multiple for element " + element + ", " + count + ", was not parseable", ex);
}
}
mf.Add(element, multiple);
}
mf.formulaString = formula;
mf.name = name;
return(mf);
}
public MolecularFormula Translate(String input, String partRegex)
{
try
{
var regex = new Regex(partRegex);
var formula = new MolecularFormula();
var matches = regex.Matches(input);
foreach (Match match in matches)
{
var partFormula = (MolecularFormula)this.partFormulas[match.Value];
if (partFormula == null)
{
throw new ApplicationException("Formula for part " + match.Value + " is unknown.");
}
formula = formula.Add(partFormula, 1);
}
return(formula);
}
catch (Exception e)
{
throw new ApplicationException("Translation of " + input + " failed. " + e.Message, e);
}
}