Examples of org.apache.lucene.search.WildcardQuery

org.apache.lucene.search.WildcardQuery
Implements the wildcard search query. Supported wildcards are *, which matches any character sequence (including the empty one), and ?, which matches any single character. Note this query can be slow, as it needs to iterate over many terms. In order to prevent extremely slow WildcardQueries, a Wildcard term should not start with one of the wildcards * or ?.
This query uses the {@link MultiTermQuery#CONSTANT_SCORE_AUTO_REWRITE_DEFAULT}rewrite method. @see WildcardTermEnum

      Term term = tq.getTerm();
      if (term.field().equals(fieldLessFieldName)) {
        return new TermQuery(new Term(name, term.bytes()));
      }
    } else if (query instanceof WildcardQuery) {
      WildcardQuery wq = (WildcardQuery) query;
      Term term = wq.getTerm();
      if (term.field().equals(fieldLessFieldName)) {
        return new WildcardQuery(new Term(name, term.bytes()));
      }
    } else if (query instanceof MultiPhraseQuery) {
      MultiPhraseQuery mpq = (MultiPhraseQuery) query;
      int[] positions = mpq.getPositions();
      List<Term[]> termArrays = mpq.getTermArrays();

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      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 );

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  }
  
  @Override
  public Query query() {
    return new WildcardQuery(new Term(property.stringKey, pattern));
  }

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     * @param value
     * @return query
     */
    private Query createTermQuery(String fieldName, String value) {
        if (suffixMatch) {
            return new WildcardQuery(new Term(fieldName, "*" + value + "*"));
        } else {
            return new PrefixQuery(new Term(fieldName, value));
        }
    }

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  public void testConstantScoreMultiTermQuery() throws Exception {


    numHighlights = 0;


    query = new WildcardQuery(new Term(FIELD_NAME, "ken*"));
    ((WildcardQuery)query).setRewriteMethod(MultiTermQuery.CONSTANT_SCORE_FILTER_REWRITE);
    searcher = new IndexSearcher(ramDir, true);
    // can't rewrite ConstantScore if you want to highlight it -
    // it rewrites to ConstantScoreQuery which cannot be highlighted
    // query = unReWrittenQuery.rewrite(reader);

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  }


  public WildcardQuery build(QueryNode queryNode) throws QueryNodeException {
    WildcardQueryNode wildcardNode = (WildcardQueryNode) queryNode;


    WildcardQuery q = new WildcardQuery(new Term(wildcardNode.getFieldAsString(),
                                                 wildcardNode.getTextAsString()));
    
    MultiTermQuery.RewriteMethod method = (MultiTermQuery.RewriteMethod)queryNode.getTag(MultiTermRewriteMethodProcessor.TAG_ID);
    if (method != null) {
      q.setRewriteMethod(method);
    }
    
    return q;
  }

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    //  be wary of unanalyzed text
    return new Query[] {
        new SpanFirstQuery(new SpanTermQuery(new Term(field, "ford")), 5),
        new SpanNearQuery(new SpanQuery[]{new SpanTermQuery(new Term(field, "night")), new SpanTermQuery(new Term(field, "trading"))}, 4, false),
        new SpanNearQuery(new SpanQuery[]{new SpanFirstQuery(new SpanTermQuery(new Term(field, "ford")), 10), new SpanTermQuery(new Term(field, "credit"))}, 10, false),
        new WildcardQuery(new Term(field, "fo*")),
    };
  }

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      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
      TopDocs aHits = searcher.search( aQuery, 100 );

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         final ValueFactoryImpl valueFactory = new ValueFactoryImpl(new LocationFactory(nsReg));
         BooleanQuery.setMaxClauseCount(Integer.MAX_VALUE);
         BooleanQuery query = new BooleanQuery();


         final String prefix = nsReg.getNamespacePrefixByURI(uri);
         query.add(new WildcardQuery(new Term(FieldNames.LABEL, prefix + ":*")), Occur.SHOULD);
         // name of the property
         query.add(new WildcardQuery(new Term(FieldNames.PROPERTIES_SET, prefix + ":*")), Occur.SHOULD);


         result = getNodes(query);


         // value of the property


         try
         {
            final Set<String> props = getFieldNames();


            query = new BooleanQuery();
            for (final String fieldName : props)
            {
               if (!FieldNames.PROPERTIES_SET.equals(fieldName))
               {
                  query.add(new WildcardQuery(new Term(fieldName, "*" + prefix + ":*")), Occur.SHOULD);
               }
            }
         }
         catch (final IndexException e)
         {

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  private int countDocsWithClass() throws IOException {
    int docCount = MultiFields.getTerms(this.atomicReader, this.classFieldName).getDocCount();
    if (docCount == -1) { // in case codec doesn't support getDocCount
      TotalHitCountCollector totalHitCountCollector = new TotalHitCountCollector();
      indexSearcher.search(new WildcardQuery(new Term(classFieldName, String.valueOf(WildcardQuery.WILDCARD_STRING))),
          totalHitCountCollector);
      docCount = totalHitCountCollector.getTotalHits();
    }
    return docCount;
  }

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