Examples of org.apache.lucene.search.Query.extractTerms()

org.apache.lucene.search.Query.extractTerms()
Expert: adds all terms occurring in this query to the terms set. Only works if this query is in its {@link #rewrite rewritten} form. @throws UnsupportedOperationException if this query is not yet rewritten

     */
    public long getContextFrequency(SurfaceForm sf) throws SearchException {
        long ctxFreq = 0;
        Query q = mLucene.getQuery(new Text(sf.name()));
        Set<Term> qTerms = new HashSet<Term>();
        q.extractTerms(qTerms);
        ScoreDoc[] hits = getHits(mLucene.getMustQuery(qTerms));
        for (ScoreDoc d: hits) {
            TermFreqVector vector = null;
            try {
                vector = mReader.getTermFreqVector(d.doc, LuceneManager.DBpediaResourceField.CONTEXT.toString());

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    Query qr = searcher.rewrite(q);


    QueryUtils.checkEqual(q, qr);


    HashSet<Term> set = new HashSet<Term>();
    qr.extractTerms(set);
    assertEquals(2, set.size());
  }
  
  public void testEquality1() {
    SpanQuery q1 = new FieldMaskingSpanQuery

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    Query qr = searcher.rewrite(q);


    QueryUtils.checkEqual(q, qr);


    HashSet<Term> set = new HashSet<Term>();
    qr.extractTerms(set);
    assertEquals(2, set.size());
  }
  
  public void testEquality1() {
    SpanQuery q1 = new FieldMaskingSpanQuery

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    Query qr = searcher.rewrite(q);


    QueryUtils.checkEqual(q, qr);


    HashSet set = new HashSet();
    qr.extractTerms(set);
    assertEquals(2, set.size());
  }
  
  public void testEquality1() {
    SpanQuery q1 = new FieldMaskingSpanQuery

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        }
        final String defaultField = "$termsForQueryString_defaultField$";
        QueryParser queryParser = new QueryParser(defaultField, analyzer);
        Query query = queryParser.parse(queryString);
        Set terms = new ListNotSet();
        query.extractTerms(terms);
        String[] termsArray = new String[terms.size()];
        int i = 0;
        for (Iterator iter = terms.iterator(); iter.hasNext(); ) {
            termsArray[i++] = ((Term) iter.next()).text();
        }

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            analyzer = new StandardAnalyzer();
        }
        QueryParser queryParser = new QueryParser(defaultField, analyzer);
        Query query = queryParser.parse(queryString);
        Set terms = new ListNotSet();
        query.extractTerms(terms);
        Term[] termsArray = new Term[terms.size()];
        int i = 0;
        for (Iterator iter = terms.iterator(); iter.hasNext(); ) {
            Term term = (Term) iter.next();
            termsArray[i++] = term;

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