/**
  * @param id - the id of the term in question
  * @return number of occurrences of a term in a corpus. If a term cannot be found it always
  *     returns 1.
  */
 public int getTermFreq(int id) {
   int freq = _termFreq.getTermFreq(id);
   return freq == 0 ? 1 : freq;
 }
 public Set<String> getTerms() {
   return _termFreq.getGlobalResourceIndex().getTermsCanonical();
 }
 /**
  * @param term
  * @return number of occurrences of a term in a corpus. If a term cannot be found it always
  *     returns 1.
  */
 public int getTermFreq(String term) {
   int freq = _termFreq.getTermFreq(term);
   return freq == 0 ? 1 : freq;
 }