def decomposeJoinBlock(jb, l, genPred, prefixes, decomposition, c):
# jb == joinblock
# l == list de endpoints
tl = []
sl = []
fl = []
#print "len jb.triples" + str(len(jb.triples))
for bgp in jb.triples:
if isinstance(bgp, Triple):
tl.append(bgp)
elif isinstance(bgp, Filter):
fl.append(bgp)
elif isinstance(bgp, Optional):
sl.append(
Optional(
decomposeUnionBlock(bgp.bgg, l, genPred, prefixes,
decomposition, c)))
elif isinstance(bgp, UnionBlock):
pub = decomposeUnionBlock(bgp, l, genPred, prefixes, decomposition,
c)
if pub:
sl.append(pub)
elif isinstance(bgp, JoinBlock):
pub = decomposeJoinBlock(bgp, l, genPred, prefixes, decomposition,
c)
if pub:
sl.append(pub)
#print 'fl'
#print fl
if tl:
gs = getGroups(l, tl, genPred, prefixes, decomposition, c)
#print 'gs'
#print gs
if gs:
gs.extend(sl)
sl = gs
else:
return None
fl1 = includeFilter(sl, fl)
fl = list(set(fl) - set(fl1))
#print "sl" + str(sl) + str(len(sl))
#print "fl" + str(fl)
if sl:
if (len(sl) == 1 and isinstance(sl[0], UnionBlock) and fl != []):
sl[0] = updateFilters(sl[0], fl)
j = JoinBlock(sl, filters=fl)
#print "filters" + str(j.filters)
return j
else:
return None
def makePlanJoinBlock(jb, plan):
sl = []
ol = []
for bgp in jb.triples:
if type(bgp) == list:
sl.extend(bgp)
elif isinstance(bgp, Optional):
ol.append(Optional(makePlanUnionBlock(bgp.bgg, plan)))
elif isinstance(bgp, UnionBlock):
sl.append(makePlanUnionBlock(bgp, plan))
elif isinstance(bgp, Service):
sl.append(bgp)
pl = makePlanAux(sl, plan)
if ol:
pl = [pl]
pl.extend(ol)
return JoinBlock(pl)
def decomposeJoinBlock(jb, l, genPred, prefixes, decomposition, c):
# jb == joinblock
# l == list de endpoints
tl = []
sl = []
fl = []
for bgp in jb.triples:
# print bgp
if isinstance(bgp, Triple):
tl.append(bgp)
elif isinstance(bgp, Filter):
fl.append(bgp)
elif isinstance(bgp, Optional):
sl.append(
Optional(
decomposeUnionBlock(bgp.bgg, l, genPred, prefixes,
decomposition, c)))
elif isinstance(bgp, UnionBlock):
pub = decomposeUnionBlock(bgp, l, genPred, prefixes, decomposition,
c)
if pub:
sl.append(pub)
# print 'tl'
# print tl
if tl:
gs = getGroups(l, tl, genPred, prefixes, decomposition, c)
# print 'gs'
# print gs
if gs:
gs.extend(sl)
sl = gs
else:
return None
includeFilter(sl, fl)
# print 'sl'
# print sl
if sl:
return JoinBlock(sl)
else:
return None
def p_bgp_4(p):
"""
bgp : OPTIONAL LKEY group_graph_pattern RKEY
"""
p[0] = Optional(p[3])
def p_bgp_service_4(p):
"""
bgp_service : OPTIONAL LKEY group_graph_pattern_service RKEY
"""
p[0] = Optional(p[3])