Package org.apache.lucene.search

Examples of org.apache.lucene.search.PrefixQuery

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  public PrefixQuery build(QueryNode queryNode) throws QueryNodeException {   

    PrefixWildcardQueryNode wildcardNode = (PrefixWildcardQueryNode) queryNode;

    String text = wildcardNode.getText().subSequence(0, wildcardNode.getText().length() - 1).toString();
    PrefixQuery q = new PrefixQuery(new Term(wildcardNode.getFieldAsString(), text));
   
    MultiTermQuery.RewriteMethod method = (MultiTermQuery.RewriteMethod)queryNode.getTag(MultiTermRewriteMethodProcessor.TAG_ID);
    if (method != null) {
      q.setRewriteMethod(method);
    }
   
    return q;
  }
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        try {
            IndexWriter writer = context.getWriter();
            // Remove all index entries in the removed subtree
            writer.deleteDocuments(newPathTerm(path));
            writer.deleteDocuments(new PrefixQuery(newPathTerm(path + "/")));
        } catch (IOException e) {
            throw new CommitFailedException(
                    "Lucene", 5, "Failed to remove the index entries of"
                    + " the removed subtree " + path, e);
        }
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  }
 
  private void verifyNotFacetsData(DirectoryReader indexReader, IndexSearcher searcher) throws IOException {
    // verify that non facets data was not damaged
    TotalHitCountCollector total = new TotalHitCountCollector();
    searcher.search(new PrefixQuery(new Term("foo", "content")), total);
    assertEquals("invalid number of results for content query", total.getTotalHits(), indexReader.maxDoc());
   
    int numDocIDs = 0;
    for (AtomicReaderContext context : indexReader.leaves()) {
      Terms docIDs = context.reader().terms("docid");
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    w.addDocument(document);

    IndexSearcher searcher = new IndexSearcher(DirectoryReader.open(w.w, false));
    w.close();
    Filter parentFilter = new QueryWrapperFilter(new TermQuery(new Term("__type", "parent")));
    Filter childFilter = new QueryWrapperFilter(new PrefixQuery(new Term("field2")));
    ToParentBlockJoinQuery query = new ToParentBlockJoinQuery(
        new FilteredQuery(new MatchAllDocsQuery(), childFilter),
        new FixedBitSetCachingWrapperFilter(parentFilter),
        ScoreMode.None
    );
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      @Override
      protected Analyzer getIndexAnalyzer(String field) {
        return analyzer;
      }
    };
    Query query = new PrefixQuery(new Term("body", "te"));
    TopDocs topDocs = searcher.search(query, null, 10, Sort.INDEXORDER);
    assertEquals(2, topDocs.totalHits);
    String snippets[] = highlighter.highlight("body", query, searcher, topDocs);
    assertEquals(2, snippets.length);
    assertEquals("This is a <b>test</b>.", snippets[0]);
    assertEquals("<b>Test</b> a one sentence document.", snippets[1]);
   
    // wrong field
    BooleanQuery bq = new BooleanQuery();
    bq.add(new MatchAllDocsQuery(), BooleanClause.Occur.SHOULD);
    bq.add(new PrefixQuery(new Term("bogus", "te")), BooleanClause.Occur.SHOULD);
    topDocs = searcher.search(bq, null, 10, Sort.INDEXORDER);
    assertEquals(2, topDocs.totalHits);
    snippets = highlighter.highlight("body", bq, searcher, topDocs);
    assertEquals(2, snippets.length);
    assertEquals("This is a test.", snippets[0]);
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            return aq.toString();
          }
        });
      }
    } else if (query instanceof PrefixQuery) {
      final PrefixQuery pq = (PrefixQuery) query;
      Term prefix = pq.getPrefix();
      if (prefix.field().equals(field)) {
        list.add(new CharacterRunAutomaton(BasicOperations.concatenate(BasicAutomata.makeString(prefix.text()),
                                                                       BasicAutomata.makeAnyString())) {
          @Override
          public String toString() {
            return pq.toString();
          }
        });
      }
    } else if (query instanceof FuzzyQuery) {
      final FuzzyQuery fq = (FuzzyQuery) query;
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    if (token.length() < minPrefixChars) {
      // The leading ngram was directly indexed:
      return new TermQuery(new Term("textgrams", token));
    }

    return new PrefixQuery(new Term(TEXT_FIELD_NAME, token));
  }
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        if (path.equals("/")) {
            path = "";
        }
        switch (filter.getPathRestriction()) {
        case ALL_CHILDREN:
            qs.add(new PrefixQuery(newPathTerm(path + "/")));
            break;
        case DIRECT_CHILDREN:
            qs.add(new PrefixQuery(newPathTerm(path + "/"))); // FIXME
            break;
        case EXACT:
            qs.add(new TermQuery(newPathTerm(path)));
            break;
        case PARENT:
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        writer.addDocument(doc);
      }
      writer.close();
     
      IndexReader reader = IndexReader.open(directory);
      PrefixQuery query = new PrefixQuery(new Term("category", "foo"));
     
      rw1 = query.rewrite(reader);
     
      BooleanQuery bq = new BooleanQuery();
      bq.add(query, BooleanClause.Occur.MUST);
     
      rw2 = bq.rewrite(reader);
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    defgMultiTermQueryTest(new WildcardQuery(new Term(F, "d*g")));
  }

  public void testPrefixQuery() throws Exception {
    makeIndexStrMV();
    defgMultiTermQueryTest(new PrefixQuery(new Term(F, "de")));
  }
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