/**
* Adds terms and frequencies found in vector into the Map termFreqMap
*
* @param field2termFreqMap a Map of terms and their frequencies per field
* @param vector List of terms and their frequencies for a doc/field
*/
private void addTermFrequencies(
Map<String, Map<String, Int>> field2termFreqMap, Terms vector, String fieldName)
throws IOException {
Map<String, Int> termFreqMap = field2termFreqMap.get(fieldName);
if (termFreqMap == null) {
termFreqMap = new HashMap<>();
field2termFreqMap.put(fieldName, termFreqMap);
}
final TermsEnum termsEnum = vector.iterator();
final CharsRefBuilder spare = new CharsRefBuilder();
BytesRef text;
while ((text = termsEnum.next()) != null) {
spare.copyUTF8Bytes(text);
final String term = spare.toString();
if (isNoiseWord(term)) {
continue;
}
final int freq = (int) termsEnum.totalTermFreq();
// increment frequency
Int cnt = termFreqMap.get(term);
if (cnt == null) {
cnt = new Int();
termFreqMap.put(term, cnt);
cnt.x = freq;
} else {
cnt.x += freq;
}
}
}
/**
* Adds terms and frequencies found in vector into the Map termFreqMap
*
* @param termFreqMap a Map of terms and their frequencies
* @param vector List of terms and their frequencies for a doc/field
* @param fieldName Optional field name of the terms for skip terms
*/
private void addTermFrequencies(
Map<String, Int> termFreqMap, Terms vector, @Nullable String fieldName) throws IOException {
final TermsEnum termsEnum = vector.iterator();
final CharsRefBuilder spare = new CharsRefBuilder();
BytesRef text;
while ((text = termsEnum.next()) != null) {
spare.copyUTF8Bytes(text);
final String term = spare.toString();
if (isNoiseWord(term)) {
continue;
}
if (isSkipTerm(fieldName, term)) {
continue;
}
final PostingsEnum docs = termsEnum.postings(null, null);
int freq = 0;
while (docs != null && docs.nextDoc() != DocIdSetIterator.NO_MORE_DOCS) {
freq += docs.freq();
}
// increment frequency
Int cnt = termFreqMap.get(term);
if (cnt == null) {
cnt = new Int();
termFreqMap.put(term, cnt);
cnt.x = freq;
} else {
cnt.x += freq;
}
}
}
