source: geniuswebcore/geniusweb/profile/PartialOrdering.py@ 72

from geniusweb.issuevalue.Bid import Bid
from geniusweb.profile.Profile import Profile

class PartialOrdering( Profile ):
        '''
        Defines a is-better relation between bids. This basically is a partially
        ordered space however some bids or groups of bids may not be relatable to
        others.
        '''
        def isPreferredOrEqual(self, bid1:Bid , bid2:Bid ) -> bool:
                '''
                @param bid1 the first item's utility/preference
                @param bid2 the second item's utility/preference
                @return true iff bid1 is considered better or equal (≥) than bid 2. In
                        all other cases false is returned. A bid may not have a ≥
                        relation at all.
                
                        This predicate should be implemented such that
                        <ul>
                        <li>b &ge; b (every bid is better or equal to itself)
                        <li>If b1&ge;b2 and b2&ge;b1 then the two bids are considered
                        equally good. Note that this differes from a partial order in
                        mathematics.
                        <li>it behaves transitive: if b1&ge;b2 and b2&ge;b3 then
                        b1&ge;b3.
                        </ul>
                '''