Examples of org.apache.lucene.search.Searcher

org.apache.lucene.search.Searcher
An abstract base class for search implementations. Implements the main search methods.
Note that you can only access hits from a Searcher as long as it is not yet closed, otherwise an IOException will be thrown.


    private static String[] queryImpl( String aLanguageStr, String aIndexStr, String aQueryStr, 
      boolean bCaptionOnly, Object[] aScoreOutArray ) throws Exception
    {
      IndexReader reader = IndexReader.open( aIndexStr );
      Searcher searcher = new IndexSearcher( reader );
            Analyzer analyzer = aLanguageStr.equals("ja") ? (Analyzer)new CJKAnalyzer() : (Analyzer)new StandardAnalyzer();


      String aField;
      if( bCaptionOnly )
        aField = "caption";
      else
        aField = "content";


      Query aQuery;
      if( aQueryStr.endsWith( "*" ) )
        aQuery = new WildcardQuery( new Term( aField, aQueryStr ) );
      else
        aQuery = new TermQuery( new Term( aField, aQueryStr ) );


      // Perform search
      Hits aHits = searcher.search( aQuery );
      int nHitCount = aHits.length();


      String aDocs[] = new String[nHitCount];  
      float aScores[] = null;
      aScores = new float[nHitCount];

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    private void assertRecordCount( RepositoryContentIndex index, int expectedCount )
        throws Exception
    {
        Query query = new MatchAllDocsQuery();
        Searcher searcher = (Searcher) index.getSearchable();
        Hits hits = searcher.search( query );
        assertEquals( "Expected Record Count for " + index.getId(), expectedCount, hits.length() );
    }

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    }


    protected List search( Query query )
        throws RepositoryIndexSearchException, IOException, java.text.ParseException
    {
        Searcher searcher = (Searcher) index.getSearchable();; // this shouldn't cause a problem.


        Hits hits = searcher.search( query );


        List results = new ArrayList();
        Iterator it = hits.iterator();
        while ( it.hasNext() )
        {

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    protected void tearDown() throws Exception { 
        super.tearDown(); 
    } 
    public void testFilter() throws IOException{ 
        Searcher s = new IndexSearcher(this.reader); 
        Query q = new TermQuery(new Term(fieldFeedId,feedID)); 
        Hits hits = s.search(q); 
        assertEquals(2,hits.length()); 
         
        hits = s.search(q,new ModifiedEntryFilter(this.excludeList.toArray(new String[0]),StorageEntryWrapper.FIELD_ENTRY_ID)); 
        assertEquals(1,hits.length()); 
        this.excludeList.add("2"); 
 
        hits = s.search(q,new ModifiedEntryFilter(this.excludeList.toArray(new String[0]),StorageEntryWrapper.FIELD_ENTRY_ID)); 
        assertEquals(0,hits.length());
        this.excludeList.add(null);
        this.excludeList.add("5"); 
        hits = s.search(q,new ModifiedEntryFilter(this.excludeList.toArray(new String[0]),StorageEntryWrapper.FIELD_ENTRY_ID)); 
        assertEquals(0,hits.length()); 
         
    }

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        RAMDirectory dir = new RAMDirectory();
        IndexWriter writer = new IndexWriter(dir, new StandardAnalyzer(), true);
        writer.addDocument(makeDocumentWithFields());
        writer.close();


        Searcher searcher = new IndexSearcher(dir);


  // search for something that does exists
  Query query = new TermQuery(new Term("keyword", "test1"));


  // ensure that queries return expected results without DateFilter first
        Hits hits = searcher.search(query);
  assertEquals(1, hits.length());


         doAssert(hits.doc(0), true);
         searcher.close();
    }

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   */
  public float search(Query query) {
    if (query == null) 
      throw new IllegalArgumentException("query must not be null");
    
    Searcher searcher = createSearcher();
    try {
      final float[] scores = new float[1]; // inits to 0.0f (no match)
      searcher.search(query, new HitCollector() {
        public void collect(int doc, float score) {
          scores[0] = score;
        }
      });
      float score = scores[0];

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    }
  }
    
  private float query(Object index, Query query) {
//    System.out.println("MB=" + (getMemorySize(index) / (1024.0f * 1024.0f)));
    Searcher searcher = null;
    try {
      if (index instanceof Directory)
        searcher = new IndexSearcher((Directory)index);
      else 
        searcher = ((MemoryIndex) index).createSearcher();


      final float[] scores = new float[1]; // inits to 0.0f
      searcher.search(query, new HitCollector() {
        public void collect(int doc, float score) {
          scores[0] = score;
        }
      });
      float score = scores[0];
//      Hits hits = searcher.search(query);
//      float score = hits.length() > 0 ? hits.score(0) : 0.0f;
      return score;
    } catch (IOException e) { // should never happen (RAMDirectory)
      throw new RuntimeException(e);
    } finally {
      try {
        if (searcher != null) searcher.close();
      } catch (IOException e) { // should never happen (RAMDirectory)
        throw new RuntimeException(e);
      }
    }
  }

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    Path localDir = new Path(getUnitTestdir(getName()), "index_" +
      Integer.toString(new Random().nextInt()));
    this.fs.copyToLocalFile(new Path(INDEX_DIR), localDir);
    FileSystem localfs = FileSystem.getLocal(conf);
    FileStatus [] indexDirs = localfs.listStatus(localDir);
    Searcher searcher = null;
    Scanner scanner = null;
    try {
      if (indexDirs.length == 1) {
        searcher = new IndexSearcher((new File(indexDirs[0].getPath().
          toUri())).getAbsolutePath());
      } else if (indexDirs.length > 1) {
        Searchable[] searchers = new Searchable[indexDirs.length];
        for (int i = 0; i < indexDirs.length; i++) {
          searchers[i] = new IndexSearcher((new File(indexDirs[i].getPath().
            toUri()).getAbsolutePath()));
        }
        searcher = new MultiSearcher(searchers);
      } else {
        throw new IOException("no index directory found");
      }


      HTable table = new HTable(conf, TABLE_NAME);
      scanner = table.getScanner(columns, HConstants.EMPTY_START_ROW);


      IndexConfiguration indexConf = new IndexConfiguration();
      String content = conf.get("hbase.index.conf");
      if (content != null) {
        indexConf.addFromXML(content);
      }
      String rowkeyName = indexConf.getRowkeyName();


      int count = 0;
      for (RowResult r : scanner) {
        String value = Bytes.toString(r.getRow());
        Term term = new Term(rowkeyName, value);
        int hitCount = searcher.search(new TermQuery(term)).length();
        assertEquals("check row " + value, 1, hitCount);
        count++;
      }
      LOG.debug("Searcher.maxDoc: " + searcher.maxDoc());
      LOG.debug("IndexReader.numDocs: " + ((IndexSearcher)searcher).getIndexReader().numDocs());      
      int maxDoc = ((IndexSearcher)searcher).getIndexReader().numDocs();
      assertEquals("check number of rows", maxDoc, count);
    } finally {
      if (null != searcher)
        searcher.close();
      if (null != scanner)
        scanner.close();
    }
  }

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     * @return A Hits object containing the matches
     * @throws Exception if an error occurs
     *
     */
    public Hits search(String line, File index_directory) throws Exception {
        Searcher searcher = new IndexSearcher(index_directory.getAbsolutePath());
        Analyzer analyzer = new StandardAnalyzer();


        Query query = QueryParser.parse(line, "contents", analyzer);
        System.out.println("Searching for: " + query.toString("contents"));


                Hits hits = searcher.search(query);
                System.out.println("Total matching documents: " + hits.length());


                final int HITS_PER_PAGE = 10;


                for (int start = 0; start < hits.length(); start += HITS_PER_PAGE) {
                    int end = Math.min(hits.length(), start + HITS_PER_PAGE);


                    for (int i = start; i < end; i++) {
                        Document doc = hits.doc(i);
                        String path = doc.get("path");


                        if (path != null) {
                            System.out.println(i + ". " + path);
                        } else {
                            String url = doc.get("url");


                            if (url != null) {
                                System.out.println(i + ". " + url);
                                System.out.println("   - " + doc.get("title"));
                            } else {
                                System.out.println(i + ". " + "No path nor URL for this document");
                            }
                        }
                    }


                }
                searcher.close();
        return hits;
    }

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     */
    private Hits search(String query_string, String publication_id, String sortField, boolean sortReverse) {
        Hits hits =null;
        
        try {
            Searcher searcher=new IndexSearcher(this.indexDir.getAbsolutePath());
            Analyzer l_analyzer=new StandardAnalyzer();
            QueryParser l_queryParser = new QueryParser(this.field,l_analyzer); // Single field
            //MultiFieldQueryParser l_queryParser = new MultiFieldQueryParser(fields[0], l_analyzer); // Multiple fields
            l_queryParser.setOperator(QueryParser.DEFAULT_OPERATOR_AND);
            getLogger().debug(query_string);
            Query l_query = l_queryParser.parse(query_string); // Single field
            //Query l_query = l_queryParser.parse(query_string,fields,l_analyzer); // Multiple fields
            if (sortField != null) {
                Sort sort = new Sort(sortField, sortReverse);
                hits = searcher.search(l_query, sort);
            } else {
                hits = searcher.search(l_query);
            }
            if(hits != null){
                return hits;
            }
        } catch (final IOException e) {

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