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:


  }


  private void checkMatches(String qString, String expectedVals)
      throws Exception {
    QueryParser qp = new ComplexPhraseQueryParser(TEST_VERSION_CURRENT, defaultFieldName, analyzer);
    qp.setFuzzyPrefixLength(1); // usually a good idea


    Query q = qp.parse(qString);


    HashSet<String> expecteds = new HashSet<String>();
    String[] vals = expectedVals.split(",");
    for (int i = 0; i < vals.length; i++) {
      if (vals[i].length() > 0)

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    doc.add(field);
    writer.addDocument(doc);
    writer.close();
    DirectoryReader ir = DirectoryReader.open(ramDir);
    IndexSearcher is = new IndexSearcher(ir);
    QueryParser qp = new AnalyzingQueryParser(TEST_VERSION_CURRENT, "content", analyzer);
    Query q = qp.parse("[เข TO เข]");
    assertEquals(1, is.search(q, 10).totalHits);
    ir.close();
    ramDir.close();
  }

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   */
  public void assertAllQueries(MemoryIndex memory, Directory ramdir, Analyzer analyzer) throws Exception {
    IndexReader reader = DirectoryReader.open(ramdir);
    IndexSearcher ram = newSearcher(reader);
    IndexSearcher mem = memory.createSearcher();
    QueryParser qp = new QueryParser(TEST_VERSION_CURRENT, "foo", analyzer);
    for (String query : queries) {
      TopDocs ramDocs = ram.search(qp.parse(query), 1);
      TopDocs memDocs = mem.search(qp.parse(query), 1);
      assertEquals(query, ramDocs.totalHits, memDocs.totalHits);
    }
    reader.close();
  }

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      in = new BufferedReader(new InputStreamReader(new FileInputStream(queries), StandardCharsets.UTF_8));
    } else {
      in = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8));
    }
    // :Post-Release-Update-Version.LUCENE_XY:
    QueryParser parser = new QueryParser(Version.LUCENE_4_9, field, analyzer);
    while (true) {
      if (queries == null && queryString == null) {                        // prompt the user
        System.out.println("Enter query: ");
      }


      String line = queryString != null ? queryString : in.readLine();


      if (line == null || line.length() == -1) {
        break;
      }


      line = line.trim();
      if (line.length() == 0) {
        break;
      }
      
      Query query = parser.parse(line);
      System.out.println("Searching for: " + query.toString(field));
            
      if (repeat > 0) {                           // repeat & time as benchmark
        Date start = new Date();
        for (int i = 0; i < repeat; i++) {

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    indexReader = IndexReader.open(FSDirectory.open(new File(indexPath)));
    numDocs = indexReader.numDocs();
    indexSearcher = new IndexSearcher(indexReader);
    standardAnalyzer = new StandardAnalyzer(Version.LUCENE_40);
    queryParser = new QueryParser(Version.LUCENE_40, searchField, standardAnalyzer);
    lastQuery = new Cache();
  }

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    // check if there is a redirect
    if(redirectTitle == null) {
      return scoreDoc; 
    }
    
    QueryParser redirectQueryParser = new QueryParser(Version.LUCENE_30, "title", standardAnalyzer);


    String redirectTitleNoUnderscores = redirectTitle.replaceAll("_", " ");
    String redirectTitleQuoted = '"' + redirectTitleNoUnderscores + '"';
    String redirectTitleEscaped = QueryParser.escape(redirectTitleQuoted);
    Query redirectQuery  = redirectQueryParser.parse(redirectTitleEscaped);


    ScoreDoc[] redirectScoreDocs = indexSearcher.search(redirectQuery, null, 1).scoreDocs; 
    if(redirectScoreDocs.length < 1) {
      System.out.println("failed redirect: " + redirectTitle + " -> " + redirectTitle);
      return scoreDoc; // redirect query did not return any results

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    Query query = DEFAULT_QUERY;
    if (hasOption(OPTION_QUERY)) {
      try {
        String queryString = COMPILE.matcher(getOption(OPTION_QUERY)).replaceAll("");
        QueryParser queryParser = new QueryParser(Version.LUCENE_43, queryString,
            new StandardAnalyzer(Version.LUCENE_43));
        query = queryParser.parse(queryString);
      } catch (ParseException e) {
        throw new IllegalArgumentException(e.getMessage(), e);
      }
    }
    lucene2SeqConf.setQuery(query);

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      for (String indexPath : indexPaths) {
        this.indexPaths.add(new Path(indexPath));
      }
      idField = in.readUTF();
      fields = Arrays.asList(in.readUTF().split(SEPARATOR_FIELDS));
      query = new QueryParser(LUCENE_43, "query", new StandardAnalyzer(LUCENE_43)).parse(in.readUTF());
      maxHits = in.readInt();
    } catch (ParseException e) {
      throw new RuntimeException("Could not deserialize " + this.getClass().getName(), e);
    }
  }

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    }


    private List<Map<String, Node>> get$(IndexReader indexReader, String uri) throws ParseException, IOException {
        String escaped = QueryParser.escape(uri) ;
        String qs = docDef.getEntityField() + ":" + escaped ;
        QueryParser queryParser = new QueryParser(VER, docDef.getPrimaryField(), analyzer) ;
        Query query = queryParser.parse(qs) ;
        IndexSearcher indexSearcher = new IndexSearcher(indexReader) ;
        ScoreDoc[] sDocs = indexSearcher.search(query, 1).scoreDocs ;
        List<Map<String, Node>> records = new ArrayList<Map<String, Node>>() ;


        // Align and DRY with Solr.

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        }
    }


    private List<Node> query$(IndexReader indexReader, String qs, int limit) throws ParseException, IOException {
        IndexSearcher indexSearcher = new IndexSearcher(indexReader) ;
        QueryParser queryParser = new QueryParser(VER, docDef.getPrimaryField(), analyzer) ;
        Query query = queryParser.parse(qs) ;


        if ( limit <= 0 )
            limit = MAX_N ;
        ScoreDoc[] sDocs = indexSearcher.search(query, limit).scoreDocs ;

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