Examples of org.apache.lucene.queryparser.classic.QueryParser

Package org.apache.lucene.queryparser.classic

Examples of org.apache.lucene.queryparser.classic.QueryParser

org.apache.lucene.queryparser.classic.QueryParser
This class is generated by JavaCC. The most important method is {@link #parse(String)}. The syntax for query strings is as follows: A Query is a series of clauses. A clause may be prefixed by:
- a plus (+) or a minus (-) sign, indicating that the clause is required or prohibited respectively; or
- a term followed by a colon, indicating the field to be searched. This enables one to construct queries which search multiple fields.
A clause may be either:
- a term, indicating all the documents that contain this term; or
- a nested query, enclosed in parentheses. Note that this may be used with a +/- prefix to require any of a set of terms.
Thus, in BNF, the query grammar is:
```
 Query  ::= ( Clause ) Clause ::= ["+", "-"] [<TERM> ":"] ( <TERM> | "(" Query ")" ) 
```
Examples of appropriately formatted queries can be found in the query syntax documentation.

In {@link TermRangeQuery}s, QueryParser tries to detect date values, e.g. date:[6/1/2005 TO 6/4/2005] produces a range query that searches for "date" fields between 2005-06-01 and 2005-06-04. Note that the format of the accepted input depends on {@link #setLocale(Locale) the locale}. A {@link org.apache.lucene.document.DateTools.Resolution} has to be set,if you want to use {@link DateTools} for date conversion.

The date resolution that shall be used for RangeQueries can be set using {@link #setDateResolution(DateTools.Resolution)}or {@link #setDateResolution(String,DateTools.Resolution)}. The former sets the default date resolution for all fields, whereas the latter can be used to set field specific date resolutions. Field specific date resolutions take, if set, precedence over the default date resolution.

If you don't use {@link DateTools} in your index, you can create your ownquery parser that inherits QueryParser and overwrites {@link #getRangeQuery(String,String,String,boolean,boolean)} touse a different method for date conversion.

Note that QueryParser is not thread-safe.

NOTE: there is a new QueryParser in contrib, which matches the same syntax as this class, but is more modular, enabling substantial customization to how a query is created.
NOTE: You must specify the required {@link Version}compatibility when creating QueryParser:


    BrowseRequest br = new BrowseRequest();
    br.setCount(10);
    br.setOffset(0);


    QueryParser parser = new QueryParser(Version.LUCENE_43, "text", new StandardAnalyzer(
        Version.LUCENE_43));
    Query q = parser.parse("Foo*");
    br.setQuery(q);


    BoboBrowser browser = new BoboBrowser(boboMultiReader);
    BrowseResult result = browser.browse(br);

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    BrowseRequest br = new BrowseRequest();
    br.setCount(10);
    br.setOffset(0);


    QueryParser parser = new QueryParser(Version.LUCENE_43, "text", new StandardAnalyzer(
        Version.LUCENE_43));
    Query q = parser.parse("Foo*");
    br.setQuery(q);


    BoboBrowser browser = new BoboBrowser(boboMultiReader);
    BrowseResult result = browser.browse(br);

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    m_indexWriter.commit();


    DirectoryReader reader = DirectoryReader.open(m_indexWriter, true);
    IndexSearcher searcher = new IndexSearcher(reader);
    TopScoreDocCollector docCollector = TopScoreDocCollector.create(100, true);
    QueryParser queryParser = new QueryParser(Version.LUCENE_43, "text", new StandardAnalyzer(
        Version.LUCENE_43));
    Query query = queryParser.parse("Foo*");
    searcher.search(query, docCollector);
    TopDocs docs = docCollector.topDocs();
    ScoreDoc[] scoreDocs = docs.scoreDocs;


    assertEquals("should be doc 0", 0, scoreDocs[0].doc);

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    BrowseSelection red = new BrowseSelection(color);
    red.addValue(RED);
    red.addValue(BLUE);
    br.addSelection(red);


    QueryParser parser = new QueryParser(Version.LUCENE_43, "text", new StandardAnalyzer(
        Version.LUCENE_43));
    Query q = parser.parse("Foo*");
    br.setQuery(q);


    BoboBrowser browser = new BoboBrowser(boboMultiReader);
    BrowseResult result = browser.browse(br);

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  }


  public void testQueryWithScore() throws Exception {
    BrowseRequest br = new BrowseRequest();
    br.setShowExplanation(false);
    QueryParser parser = new QueryParser(Version.LUCENE_43, "color", new StandardAnalyzer(
        Version.LUCENE_43));
    br.setQuery(parser.parse("color:red OR shape:square"));
    br.setCount(10);
    br.setOffset(0);


    br.setSort(new SortField[] { SortField.FIELD_SCORE });
    BrowseResult res = doTest(br, 4, null, new String[] { "1", "7", "2", "5" });

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  }


  public void testBrowseWithQuery() {
    try {
      BrowseRequest br = new BrowseRequest();
      QueryParser parser = new QueryParser(Version.LUCENE_43, "shape", new StandardAnalyzer(
          Version.LUCENE_43));
      br.setQuery(parser.parse("square OR circle"));
      br.setCount(10);
      br.setOffset(0);


      BrowseSelection sel = new BrowseSelection("color");
      sel.addValue("red");

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   * @param qs array of strings containing query expressions
   * @param a  analyzer to use when parsing queries
   * @return array of Lucene queries
   */
  private static Query[] createQueries(List<Object> qs, Analyzer a) {
    QueryParser qp = new QueryParser(Version.LUCENE_CURRENT, DocMaker.BODY_FIELD, a);
    List<Object> queries = new ArrayList<Object>();
    for (int i = 0; i < qs.size(); i++)  {
      try {
        
        Object query = qs.get(i);
        Query q = null;
        if (query instanceof String) {
          q = qp.parse((String) query);
          
        } else if (query instanceof Query) {
          q = (Query) query;
          
        } else {

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    }
                
    private int doSearch(String searchPhrase, int maxNumberOfHits, Version luceneVersion) throws NullPointerException, ParseException, IOException {
        LOG.trace("*** Search Phrase: {} ***", searchPhrase);


        QueryParser parser = new QueryParser(luceneVersion, "contents", analyzer);
        Query query = parser.parse(searchPhrase);
        TopScoreDocCollector collector = TopScoreDocCollector.create(maxNumberOfHits, true);
        indexSearcher.search(query, collector);
        hits = collector.topDocs().scoreDocs;
        
        LOG.trace("*** Search generated {} hits ***", hits.length);

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    Analyzer analyzer = createAnalyzer(srchOpts);
    if (analyzer == null) {
      return null;
    }
    String defField = getDefaultField(srchOpts);
    QueryParser qp = new QueryParser(defField, analyzer);
    Object ckXmlParser = find(srchOpts, "ckXmlParser");
    Object ckWild = find(srchOpts, "ckWild");
    Object ckPosIncr = find(srchOpts, "ckPosIncr");
    Object ckLoExp = find(srchOpts, "ckLoExp");
    Object cbDateRes = find(srchOpts, "cbDateRes");
    DateTools.Resolution resolution = Util.getResolution(getString(cbDateRes, "text"));
    Object cbOp = find(srchOpts, "cbOp");
    Object bqMaxCount = find(srchOpts, "bqMaxCount");
    int maxCount = 1024;
    try {
      maxCount = Integer.parseInt(getString(bqMaxCount, "text"));
    } catch (Exception e) {
      e.printStackTrace();
      showStatus("Invalid BooleanQuery max clause count, using default 1024");
    }
    QueryParser.Operator op;
    BooleanQuery.setMaxClauseCount(maxCount);
    String opString = getString(cbOp, "text");
    if (opString.equalsIgnoreCase("OR")) {
      op = QueryParser.OR_OPERATOR;
    } else {
      op = QueryParser.AND_OPERATOR;
    }
    qp.setAllowLeadingWildcard(getBoolean(ckWild, "selected"));
    qp.setEnablePositionIncrements(getBoolean(ckPosIncr, "selected"));
    qp.setLowercaseExpandedTerms(getBoolean(ckLoExp, "selected"));
    qp.setDateResolution(resolution);
    qp.setDefaultOperator(op);
    if (getBoolean(ckXmlParser, "selected")) {
      
      CoreParser cp = createParser(defField,analyzer);
      Query q = cp.parse(new ByteArrayInputStream(queryString.getBytes("UTF-8")));
      return q;
    } else {
      return qp.parse(queryString);
    }
  }

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        String realQuery = queryStr.substring(start, end);
        LOG.debug("Realquery [{0}]", realQuery);
        String superQueryStr = getMatchText(realQuery);
        LOG.debug("Parseable sub query [{0}]", superQueryStr);
        String key = _prefixToSub + _subQueryIndex;
        QueryParser newParser = getNewParser();
        Query query = newParser.parse(superQueryStr);
        if (!isSameGroupName(query)) {
          throw new ParseException("Super query [" + superQueryStr + "] cannot reference more than one column family.");
        }
        if (_superSearch) {
          query = newSuperQuery(query);

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