Examples of org.apache.lucene.search.PhraseQuery

org.apache.lucene.search.PhraseQuery
A Query that matches documents containing a particular sequence of terms. A PhraseQuery is built by QueryParser for input like "new york".
This query may be combined with other terms or queries with a {@link BooleanQuery}.

      assertEquals(1, bestFragments.length);
      assertEquals("first browser war it lost virtually all of its share to <b>Internet</b> <b>Explorer</b> Netscape was discontinued and support for all Netscape browsers", bestFragments[0]);
    }
    
    {
      PhraseQuery query = new PhraseQuery();
      query.add(new Term(field, "internet"));
      query.add(new Term(field, "explorer"));
      FieldQuery fieldQuery = highlighter.getFieldQuery(query, reader);
      String[] bestFragments = highlighter.getBestFragments(fieldQuery, reader,
          docId, field, 128, 1);
      // highlighted results are centered
      assertEquals(1, bestFragments.length);

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      assertEquals(1, bestFragments.length);
      assertEquals("<b>foo</b> is <b>highlighed</b> and", bestFragments[0]);
    }
    {
      BooleanQuery query = new BooleanQuery();
      PhraseQuery pq = new PhraseQuery();
      pq.add(new Term(field, "test"));
      pq.add(new Term(field, "foo"));
      pq.add(new Term(field, "highlighed"));
      pq.setSlop(5);
      query.add(new TermQuery(new Term(field, "foo")), Occur.MUST);
      query.add(pq, Occur.MUST);
      query.add(new TermQuery(new Term(field, "highlighed")), Occur.MUST);
      FieldQuery fieldQuery = highlighter.getFieldQuery(query, reader);
      String[] bestFragments = highlighter.getBestFragments(fieldQuery, reader,
          docId, field, 18, 1);
      // highlighted results are centered
      assertEquals(0, bestFragments.length);
      bestFragments = highlighter.getBestFragments(fieldQuery, reader,
          docId, field, 30, 1);
      // highlighted results are centered
      assertEquals(1, bestFragments.length);
      assertEquals("a <b>test</b> where <b>foo</b> is <b>highlighed</b> and", bestFragments[0]);
      
    }
    {
      PhraseQuery query = new PhraseQuery();
      query.add(new Term(field, "test"));
      query.add(new Term(field, "foo"));
      query.add(new Term(field, "highlighed"));
      query.setSlop(3);
      FieldQuery fieldQuery = highlighter.getFieldQuery(query, reader);
      String[] bestFragments = highlighter.getBestFragments(fieldQuery, reader,
          docId, field, 18, 1);
      // highlighted results are centered
      assertEquals(0, bestFragments.length);
      bestFragments = highlighter.getBestFragments(fieldQuery, reader,
          docId, field, 30, 1);
      // highlighted results are centered
      assertEquals(1, bestFragments.length);
      assertEquals("a <b>test</b> where <b>foo</b> is <b>highlighed</b> and", bestFragments[0]);
      
    }
    {
      PhraseQuery query = new PhraseQuery();
      query.add(new Term(field, "test"));
      query.add(new Term(field, "foo"));
      query.add(new Term(field, "highlighted"));
      query.setSlop(30);
      FieldQuery fieldQuery = highlighter.getFieldQuery(query, reader);
      String[] bestFragments = highlighter.getBestFragments(fieldQuery, reader,
          docId, field, 18, 1);
      assertEquals(0, bestFragments.length);
    }
    {
      BooleanQuery query = new BooleanQuery();
      PhraseQuery pq = new PhraseQuery();
      pq.add(new Term(field, "test"));
      pq.add(new Term(field, "foo"));
      pq.add(new Term(field, "highlighed"));
      pq.setSlop(5);
      BooleanQuery inner = new BooleanQuery();
      inner.add(pq, Occur.MUST);
      inner.add(new TermQuery(new Term(field, "foo")), Occur.MUST);
      query.add(inner, Occur.MUST);
      query.add(pq, Occur.MUST);

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  private Query clause( String field, float boost, String... terms ) {
    Query q;
    if ( terms.length == 1 ) {
      q = new TermQuery( new Term( field, terms[ 0 ] ) );
    } else {
      PhraseQuery pq = new PhraseQuery();
      for ( String term: terms ) {
        pq.add( new Term( field, term ) );
      }
      q = pq;
    }
    q.setBoost( boost );
    return q;

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      doc.add(newStringField("id", "" + (i % 10), Field.Store.NO));
      doc.add(newTextField("content", "bbb " + i, Field.Store.NO));
      writer.updateDocument(new Term("id", "" + (i%10)), doc);
    }
    // Deletes one of the 10 added docs, leaving 9:
    PhraseQuery q = new PhraseQuery();
    q.add(new Term("content", "bbb"));
    q.add(new Term("content", "14"));
    writer.deleteDocuments(q);


    writer.forceMerge(1);
    writer.commit();

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    }
    
    writer.addIndexes(aux);
    
    // Deletes one of the 10 added docs, leaving 9:
    PhraseQuery q = new PhraseQuery();
    q.add(new Term("content", "bbb"));
    q.add(new Term("content", "14"));
    writer.deleteDocuments(q);


    writer.forceMerge(1);
    writer.commit();

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      doc.add(newTextField("content", "bbb " + i, Field.Store.NO));
      writer.updateDocument(new Term("id", "" + (i%10)), doc);
    }


    // Deletes one of the 10 added docs, leaving 9:
    PhraseQuery q = new PhraseQuery();
    q.add(new Term("content", "bbb"));
    q.add(new Term("content", "14"));
    writer.deleteDocuments(q);


    writer.addIndexes(aux);


    writer.forceMerge(1);

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          query.add( value.toArray( new Term[value.size()] ), entry.getKey() );
        }
        perFieldQuery = query;
      }
      else {
        PhraseQuery query = new PhraseQuery();
        query.setSlop( phraseContext.getSlop() );
        for ( Map.Entry<Integer,List<Term>> entry : termsPerPosition.entrySet() ) {
          final List<Term> value = entry.getValue();
          query.add( value.get( 0 ), entry.getKey() );
        }
        perFieldQuery = query;
      }
    }
    return fieldContext.getFieldCustomizer().setWrappedQuery( perFieldQuery ).createQuery();

View Full Code Here


  private void addSloppyPhrases(Query input, BooleanQuery output) {
    Clause[] clauses = input.getClauses();
    for (int f = 0; f < FIELDS.length; f++) {


      PhraseQuery sloppyPhrase = new PhraseQuery();
      sloppyPhrase.setBoost(FIELD_BOOSTS[f] * PHRASE_BOOST);
      sloppyPhrase.setSlop(/*"anchor".equals(FIELDS[f])  TODO MC - I commented because doesn't make any sense
                           ? NutchDocumentAnalyzer.INTER_ANCHOR_GAP
                           :*/ SLOP);
      int sloppyTerms = 0;


      for (int i = 0; i < clauses.length; i++) {
        Clause c = clauses[i];
        
        if (!c.getField().equals(Clause.DEFAULT_FIELD))
          continue;                               // skip non-default fields
        
        if (c.isPhrase())                         // skip exact phrases
          continue;


        if (c.isProhibited())                     // skip prohibited terms
          continue;
        
        sloppyPhrase.add(luceneTerm(FIELDS[f], c.getTerm()));
        sloppyTerms++;
      }


      if (sloppyTerms > 1)
        output.add(sloppyPhrase, BooleanClause.Occur.SHOULD);

View Full Code Here

  /** Utility to construct a Lucene exact phrase query for a Nutch phrase. */
  private org.apache.lucene.search.Query
       exactPhrase(Phrase nutchPhrase,
                   String field, float boost) {
    Term[] terms = nutchPhrase.getTerms();
    PhraseQuery exactPhrase = new PhraseQuery();
    for (int i = 0; i < terms.length; i++) {
      exactPhrase.add(luceneTerm(field, terms[i]));
    }
    exactPhrase.setBoost(boost);
    return exactPhrase;
  }

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      //for (int j=0; j<sterms.length; j++) {    
      BooleanQuery out = new BooleanQuery();
      for (int j=0; j<FIELDS.length; j++) {    
        if (c.isPhrase()) {                    
          Term[] terms = c.getPhrase().getTerms();
          PhraseQuery exactPhrase = new PhraseQuery();
          for (int k=0; k<terms.length; k++) {
            exactPhrase.add(luceneTerm(FIELDS[j], terms[k]));
          }
          out.add(exactPhrase, BooleanClause.Occur.SHOULD);
        }
        else {
          out.add(new TermQuery(luceneTerm(FIELDS[j], c.getTerm())), BooleanClause.Occur.SHOULD);

View Full Code Here

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