TermEnum termEnum = reader.terms (new Term (field));
try {
do {
Term term = termEnum.term();
if (term==null || term.field() != field) break;
float termval = parser.parseFloat(term.text());
if (retArray == null) // late init
retArray = new float[reader.maxDoc()];
termDocs.seek (termEnum);
while (termDocs.next()) {
retArray[termDocs.doc()] = termval;