private Token newTok(Token orig, int start, int end)
{
int startOff = orig.startOffset();
int endOff = orig.endOffset();
// if length by start + end offsets doesn't match the term text then assume
// this is a synonym and don't adjust the offsets.
if (orig.termLength() == endOff - startOff)
{
endOff = startOff + end;
startOff += start;
}
return((Token)orig.clone(orig.termBuffer(), start, (end - start), startOff, endOff));
}
#pragma warning restore 672
// index "a","b","c" as pos0="a", pos1="b", pos2="c", pos2="abc"
private void addCombos(List /*<Token>*/ lst, int start, int end, bool generateSubwords, bool catenateSubwords, int posOffset)
{
if (end - start == 1)
{
// always generate a word alone, even if generateSubwords=0 because
// the catenation of all the subwords *is* the subword.
queue.add(lst.get(start));
return;
}
StringBuilder sb = null;
if (catenateSubwords)
{
sb = new StringBuilder();
}
Token firstTok = null;
Token tok = null;
for (int i = start; i < end; i++)
{
tok = (Token)lst.get(i);
if (catenateSubwords)
{
if (i == start)
{
firstTok = tok;
}
sb.append(tok.termBuffer(), 0, tok.termLength());
}
if (generateSubwords)
{
queue.add(tok);
}
}
if (catenateSubwords)
{
Token concatTok = new Token(sb.toString(),
firstTok.startOffset(),
tok.endOffset(),
firstTok.type());
// if we indexed some other tokens, then overlap concatTok with the last.
// Otherwise, use the value passed in as the position offset.
concatTok.setPositionIncrement(generateSubwords == true ? 0 : posOffset);
queue.add(concatTok);
}
}