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WildcardQuery.h

/*------------------------------------------------------------------------------
* Copyright (C) 2003-2006 Ben van Klinken and the CLucene Team
* 
* Distributable under the terms of either the Apache License (Version 2.0) or 
* the GNU Lesser General Public License, as specified in the COPYING file.
------------------------------------------------------------------------------*/
#ifndef _lucene_search_WildcardQuery_
#define _lucene_search_WildcardQuery_
#if defined(_LUCENE_PRAGMA_ONCE)
# pragma once
#endif

#include "CLucene/index/IndexReader.h"
#include "CLucene/index/Term.h"
#include "MultiTermQuery.h"
#include "WildcardTermEnum.h"

CL_NS_DEF(search)

    /** Implements the wildcard search query. Supported wildcards are <code>*</code>, which
             * matches any character sequence (including the empty one), and <code>?</code>,
             * which matches any single character. Note this query can be slow, as it
             * needs to iterate over all terms. In order to prevent extremely slow WildcardQueries,
             * a Wildcard term must not start with one of the wildcards <code>*</code> or
             * <code>?</code>.
             * 
             * @see WildcardTermEnum
             */
00029     class WildcardQuery: public MultiTermQuery {
    protected:
      FilteredTermEnum* getEnum(CL_NS(index)::IndexReader* reader);
            WildcardQuery(const WildcardQuery& clone);
    public:
            WildcardQuery(CL_NS(index)::Term* term);
            ~WildcardQuery();
    
          //Returns the string "WildcardQuery"
      const TCHAR* getQueryName() const;
            static const TCHAR* getClassName();
            
            size_t hashCode() const;
            bool equals(Query* other) const;
            Query* clone() const;
    };
    
    
    
class WildcardFilter: public Filter 
{
private:
      CL_NS(index)::Term* term;
protected:
      WildcardFilter( const WildcardFilter& copy );
      
public:
      WildcardFilter(CL_NS(index)::Term* term);
      ~WildcardFilter();

      /** Returns a BitSet with true for documents which should be permitted in
      search results, and false for those that should not. */
      CL_NS(util)::BitSet* bits( CL_NS(index)::IndexReader* reader );
      
      Filter* clone() const;
      TCHAR* toString();
};


CL_NS_END
#endif

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