// parses a list of MappingCharFilter style rules into a custom byte[] type table
private sbyte[] parseTypes(IList <string> rules)
{
SortedMap <char?, sbyte?> typeMap = new SortedDictionary <char?, sbyte?>();
foreach (string rule in rules)
{
Matcher m = typePattern.matcher(rule);
if (!m.find())
{
throw new System.ArgumentException("Invalid Mapping Rule : [" + rule + "]");
}
string lhs = parseString(m.group(1).Trim());
sbyte? rhs = parseType(m.group(2).Trim());
if (lhs.Length != 1)
{
throw new System.ArgumentException("Invalid Mapping Rule : [" + rule + "]. Only a single character is allowed.");
}
if (rhs == null)
{
throw new System.ArgumentException("Invalid Mapping Rule : [" + rule + "]. Illegal type.");
}
typeMap.put(lhs[0], rhs);
}
// ensure the table is always at least as big as DEFAULT_WORD_DELIM_TABLE for performance
sbyte[] types = new sbyte[Math.Max(typeMap.LastKey() + 1, WordDelimiterIterator.DEFAULT_WORD_DELIM_TABLE.Length)];
for (int i = 0; i < types.Length; i++)
{
types[i] = WordDelimiterIterator.getType(i);
}
foreach (KeyValuePair <char?, sbyte?> mapping in typeMap.EntrySet())
{
types[mapping.Key] = mapping.Value;
}
return(types);
}
