private static ICharSequence EscapeChar(ICharSequence str, CultureInfo locale)
{
if (str == null || str.Length == 0)
return str;
ICharSequence buffer = str;
// regular escapable Char for terms
for (int i = 0; i < escapableTermChars.Length; i++)
{
buffer = ReplaceIgnoreCase(buffer, escapableTermChars[i].ToLower(locale),
"\\", locale);
}
// First Character of a term as more escaping chars
for (int i = 0; i < escapableTermExtraFirstChars.Length; i++)
{
if (buffer[0] == escapableTermExtraFirstChars[i][0])
{
buffer = new StringCharSequenceWrapper("\\" + buffer[0]
+ buffer.SubSequence(1, buffer.Length).ToString());
break;
}
}
return buffer;
}
public ICharTermAttribute Append(ICharSequence csq, int start, int end)
{
if (csq == null)
csq = new StringCharSequenceWrapper("null");
int len = end - start, csqlen = csq.Length;
if (len < 0 || start > csqlen || end > csqlen)
throw new IndexOutOfRangeException();
if (len == 0)
return this;
ResizeBuffer(TermLength + len);
while (start < end)
TermBuffer[TermLength++] = csq.CharAt(start++);
return this;
}