PkgRelation.h

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#ifndef _PkgRelation_h
#define _PkgRelation_h

#include <list>

#include <y2pm/PkgName.h>
#include <y2pm/PkgEdition.h>
#include <y2pm/PMSolvablePtr.h>

class PkgRelation {
        PkgName    _name;
        rel_op     _op;
        PkgEdition _edition;
        bool       _isprereq;  // whether this is a prerequirement
  public:
        PkgRelation()
        : _op(NONE), _isprereq(false)
        {}

        PkgRelation( const PkgName& n )
        : _name(n), _op(NONE), _isprereq(false)
        {}

        PkgRelation( const PkgName& n, rel_op o, const PkgEdition& e )
        : _name(n), _op(o), _edition(e), _isprereq(false)
        {}
        // default copy constructor and assigment are ok

        const PkgName&    name()    const { return _name; }
        rel_op            op()      const { return _op; }
        const PkgEdition& edition() const { return _edition; }

        // return true if this relation holds given a package (providing itself)
        // or another relation (which is a provides relation)
        bool matches( constPMSolvablePtr pkg ) const;
        bool matches( const PkgRelation & rel ) const;

        bool operator==( const PkgRelation& r2 ) const {
                return( _name == r2._name && _op == r2._op &&
                                (_op == NONE || _edition == r2._edition) );
        }
        bool operator!=( const PkgRelation& r2 ) const { return !operator==(r2); }

        std::string asString() const;

        void setPreReq(bool yes) { _isprereq = yes; }

        bool isPreReq() const { return _isprereq; }

        bool isFileRel() const { return( _name->size() && _name->at( 0 ) == '/' ); }

        friend std::ostream& operator<<(std::ostream&, const PkgRelation&);

      public:

        static std::string toString( const PkgRelation & t );

        static PkgRelation fromString( std::string s );

        static std::list<PkgRelation> parseRelations( const std::string & data_tr );

      private:

        static rel_op string2DepCompare( const std::string & str_tr );
};

#endif  /* _PkgRelation_h */


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