text: /*------------------------------------------------------------------------------
  * 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.
  ------------------------------------------------------------------------------*/
  #include "CLucene/StdHeader.h"
  #include "QueryFilter.h"
  #include "IndexSearcher.h"
  
  CL_NS_DEF(search)
  CL_NS_USE(util)
  CL_NS_USE(index)
  
  
  QueryFilter::QueryFilter( const Query* query )
  {
  	this->query = query->clone();
  }
  
  
  QueryFilter::~QueryFilter()
  {
  	_CLDELETE( query );
  }
  
  
  QueryFilter::QueryFilter( const QueryFilter& copy )
  {
  	this->query = copy.query->clone();
  }
  
  
  Filter* QueryFilter::clone() const {
  	return _CLNEW QueryFilter(*this );
  }
  
  
  TCHAR* QueryFilter::toString()
  {
  	TCHAR* qt = query->toString();
  	size_t len = _tcslen(qt) + 14;
  	TCHAR* ret = _CL_NEWARRAY( TCHAR, len );
  	ret[0] = 0;
  	_sntprintf( ret, len, _T("QueryFilter(%s)"), qt );
  	_CLDELETE_CARRAY(qt);
  	return ret;
  }
  
  
  /** Returns a BitSet with true for documents which should be permitted in
  search results, and false for those that should not. */
  BitSet* QueryFilter::bits( IndexReader* reader )
  {
      BitSet* bits = _CLNEW BitSet(reader->maxDoc());
  
  	IndexSearcher s(reader);
  	QFHitCollector hc(bits);
  	s._search(query, NULL, &hc);
      return bits;
  }
  
  
  QueryFilter::QFHitCollector::QFHitCollector(CL_NS(util)::BitSet* bits){
  	this->bits = bits;
  }
  
  void QueryFilter::QFHitCollector::collect(const int32_t doc, const qreal score) {
  	bits->set(doc);  // set bit for hit
  }
  
  
  CL_NS_END
  