Examples of org.apache.lucene.search.Query

org.apache.lucene.search.Query
The abstract base class for queries.
Instantiable subclasses are:
- {@link TermQuery}
- {@link MultiTermQuery}
- {@link BooleanQuery}
- {@link WildcardQuery}
- {@link PhraseQuery}
- {@link PrefixQuery}
- {@link MultiPhraseQuery}
- {@link FuzzyQuery}
- {@link TermRangeQuery}
- {@link NumericRangeQuery}
- {@link org.apache.lucene.search.spans.SpanQuery}
A parser for queries is contained in:
- {@link org.apache.lucene.queryParser.QueryParser QueryParser}

    if (VERBOSE) System.out.println("Searching for: " + query.toString(FIELD_NAME));
    // at this point the multisearcher calls combine(query[])
    hits = multiSearcher.search(query, null, 1000);


    // query = QueryParser.parse("multi*", FIELD_NAME, new StandardAnalyzer(TEST_VERSION));
    Query expandedQueries[] = new Query[2];
    expandedQueries[0] = query.rewrite(reader1);
    expandedQueries[1] = query.rewrite(reader2);
    query = query.combine(expandedQueries);


    // create an instance of the highlighter with the tags used to surround

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      @Override
      public void run() throws Exception {
        String docMainText = "fred is one of the people";
        QueryParser parser = new QueryParser(TEST_VERSION_CURRENT, FIELD_NAME, analyzer);
        Query query = parser.parse("fred category:people");


        // highlighting respects fieldnames used in query


        Scorer fieldSpecificScorer = null;
        if (mode == TestHighlightRunner.QUERY) {

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      @Override
      public void run() throws Exception {
        String s = "Hi-Speed10 foo";


        Query query;
        Highlighter highlighter;
        String result;


        query = new QueryParser(TEST_VERSION_CURRENT, "text", new MockAnalyzer(random, MockTokenizer.WHITESPACE, false)).parse("foo");
        highlighter = getHighlighter(query, "text", getTS2(), HighlighterTest.this);

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  }
  
  private void searchIndex() throws IOException, ParseException, InvalidTokenOffsetsException {
    String q = "t_text1:random";
    QueryParser parser = new QueryParser(TEST_VERSION_CURRENT,  "t_text1", a );
    Query query = parser.parse( q );
    IndexSearcher searcher = new IndexSearcher( dir, true );
    // This scorer can return negative idf -> null fragment
    Scorer scorer = new QueryTermScorer( query, searcher.getIndexReader(), "t_text1" );
    // This scorer doesn't use idf (patch version)
    //Scorer scorer = new QueryTermScorer( query, "t_text1" );

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  protected Query getFieldQuery(String field, String queryText, int slop) throws ParseException {
    if (field == null) {
      List<BooleanClause> clauses = new ArrayList<BooleanClause>();
      for (int i = 0; i < fields.length; i++) {
        Query q = super.getFieldQuery(fields[i], queryText);
        if (q != null) {
          //If the user passes a map of boosts
          if (boosts != null) {
            //Get the boost from the map and apply them
            Float boost = boosts.get(fields[i]);
            if (boost != null) {
              q.setBoost(boost.floatValue());
            }
          }
          applySlop(q,slop);
          clauses.add(new BooleanClause(q, BooleanClause.Occur.SHOULD));
        }
      }
      if (clauses.size() == 0)  // happens for stopwords
        return null;
      return getBooleanQuery(clauses, true);
    }
    Query q = super.getFieldQuery(field, queryText);
    applySlop(q,slop);
    return q;
  }

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      throw new IllegalArgumentException("queries.length != fields.length");
    BooleanQuery bQuery = new BooleanQuery();
    for (int i = 0; i < fields.length; i++)
    {
      QueryParser qp = new QueryParser(matchVersion, fields[i], analyzer);
      Query q = qp.parse(queries[i]);
      if (q!=null && // q never null, just being defensive
          (!(q instanceof BooleanQuery) || ((BooleanQuery)q).getClauses().length>0)) {
        bQuery.add(q, BooleanClause.Occur.SHOULD);
      }
    }

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    if (fields.length != flags.length)
      throw new IllegalArgumentException("fields.length != flags.length");
    BooleanQuery bQuery = new BooleanQuery();
    for (int i = 0; i < fields.length; i++) {
      QueryParser qp = new QueryParser(matchVersion, fields[i], analyzer);
      Query q = qp.parse(query);
      if (q!=null && // q never null, just being defensive 
          (!(q instanceof BooleanQuery) || ((BooleanQuery)q).getClauses().length>0)) {
        bQuery.add(q, flags[i]);
      }
    }

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      throw new IllegalArgumentException("queries, fields, and flags array have have different length");
    BooleanQuery bQuery = new BooleanQuery();
    for (int i = 0; i < fields.length; i++)
    {
      QueryParser qp = new QueryParser(matchVersion, fields[i], analyzer);
      Query q = qp.parse(queries[i]);
      if (q!=null && // q never null, just being defensive
          (!(q instanceof BooleanQuery) || ((BooleanQuery)q).getClauses().length>0)) {
        bQuery.add(q, flags[i]);
      }
    }

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    return null; /* subqueries acceptable */
  }


  
  public void addSpanQueries(SpanNearClauseFactory sncf) throws IOException {
    Query snq = getSpanNearQuery(sncf.getIndexReader(),
                                  sncf.getFieldName(),
                                  getWeight(),
                                  sncf.getBasicQueryFactory());
    sncf.addSpanNearQuery(snq);
  }

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    sncf.addSpanNearQuery(snq);
  }


  @Override
  public Query makeLuceneQueryFieldNoBoost(final String fieldName, final BasicQueryFactory qf) {
    return new Query () {
      
      @Override
      public String toString(String fn) {
        return getClass().toString() + " " + fieldName + " (" + fn + "?)";
      }

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