/*
* 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());
}
;
}
;
}
/*
* Utility function to display a term vector.
*/
static void termVectorDisplay(Terms terms) throws IOException {
if ((terms == null) || (terms.size() == -1)) System.out.println(" The field is not stored.");
else {
/*
* The terms for this field are stored.
*/
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(
" %10d %-20s %d ",
ithTerm.ord(), ithTerm.term().utf8ToString(), ithTerm.totalTermFreq());
DocsAndPositionsEnum currDoc = ithTerm.docsAndPositions(null, null);
currDoc.nextDoc();
for (int jthPosition = 0; jthPosition < ithTerm.totalTermFreq(); jthPosition++)
System.out.print(currDoc.nextPosition() + " ");
System.out.println();
}
;
}
;
}