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SQLPredicateTree.h

                              /* SQLPredicateTree.h */

#ifndef  SQL_PREDICATE_TREE_HH  
#define  SQL_PREDICATE_TREE_HH  

#include "PredicateTree.h"


namespace LcgInfo{
/************************************  CLASS SQLPredicateTree ***********************************/
   class SQLPredicateTree: public PredicateTree{

public:
   SQLPredicateTree();  

   virtual ~SQLPredicateTree();

   virtual SQLPredicateTree* create()=0;

   virtual SQLPredicateTree * clone()=0;

   virtual void insertPredicate(std::string const & pPred);

   virtual std::string evaluate(std::vector<std::string> & pQueries)=0;

protected:     
   virtual std::string getCHARS_TO_TOKENIZE_PREDICATES();

/*
 * The chars that have to be escaped in the literals, so that they are not
 * interpreted as special characters (comparison operators...).  
 */
   static std::string const CHARS_TO_ESCAPE_IN_SQL_LITERALS;


private:

   void processLevel0(std::string const& pPred, short int& pLastPosLeft,
                      short int& pFirstPosRight);   
};

}
#endif

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