/* * listTermDictionary displays the term dictionary for a field. */ static void listTermDictionary(IndexReader reader, String fieldName) throws IOException { System.out.println("\nTerm Dictionary: field " + fieldName); /* Grant says: MultiFields.getTerms(IndexReader, fieldName) */ Terms terms = MultiFields.getTerms(reader, fieldName); if ((terms == null) || (terms.size() == -1)) System.out.println(" The term dictionary is empty."); else { System.out.println(" Vocabulary size: " + terms.size() + " terms"); TermsEnum ithTerm = terms.iterator(null); /* * Iterate over the terms in this document. * Information about a term's occurrences (tf and * positions) is accessed via the indexing API, which * returns inverted lists that describe (only) the * current document. */ while (ithTerm.next() != null) { System.out.format( " %-30s %d %d\n", ithTerm.term().utf8ToString(), ithTerm.docFreq(), ithTerm.totalTermFreq()); } ; } ; }