def __init__(self, clauses=[]):
"""
Create the two indices and call the superclass initializer.
"""
self.res_index = ResolutionIndex()
self.sub_index = SubsumptionIndex()
ClauseSet.__init__(self, clauses)
class IndexedClauseSet(ClauseSet):
"""
This is a normal clause set, augmented by indices that speeds up
the finding of resolution and subsumption partners.
"""
def __init__(self, clauses=[]):
"""
Create the two indices and call the superclass initializer.
"""
self.res_index = ResolutionIndex()
self.sub_index = SubsumptionIndex()
ClauseSet.__init__(self, clauses)
def addClause(self, clause):
"""
Add the clause to the indices, then use the superclass
function to add it to the actual set.
"""
self.res_index.insertClause(clause)
self.sub_index.insertClause(clause)
ClauseSet.addClause(self, clause)
def extractClause(self, clause):
"""
Remove the clause from the indices, then use the superclass
function to remove it to the actual set.
"""
self.res_index.removeClause(clause)
self.sub_index.removeClause(clause)
return ClauseSet.extractClause(self, clause)
def getResolutionLiterals(self, lit):
"""
Overwrite the original function with one based on indexing.
"""
return self.res_index.getResolutionLiterals(lit)
def getSubsumingCandidates(self, queryclause):
"""
Overwrite the original function with one based on indexing.
"""
return self.sub_index.getSubsumingCandidates(queryclause)
def getSubsumedCandidates(self, queryclause):
"""
Overwrite the original function with one based on indexing.
"""
return self.sub_index.getSubsumedCandidates(queryclause)