class CSHandler:
def __init__(self):
#self.__L1Tree = Parsetree()
#self.__L2Tree = Parsetree()
self.__L1 = ""
self.__L2 = ""
self.__curL1 = ""
self.__curL2 = ""
self.__L1Tree = Dependencytree()
self.__L2Tree = Dependencytree()
self.__align = {}
self.__revAlign = {}
self.__utils = Utils()
self.__phraseMap = {}
self.__l1Index = 0
self.__clausalChunks = ["CCP","VGF", "NULL__CCP","NULL__VGF"]
def updatePhraseMap(self, phraseMap):
self.__phraseMap = phraseMap
def updateLIDTags(self, L1, L2):
self.__L1 = L1
self.__L2 = L2
def updateHandler(self, l1Sent, l2Sent, alignLine, l1Index):
#sys.stderr.write(alignLine+'\n')
l2Index = 1-l1Index
self.__l1Index = l1Index
if l1Index:
self.__curL1 = self.__L2
self.__curL2 = self.__L1
self.__L1Tree.updateTree(l2Sent)
self.__L2Tree.updateTree(l1Sent)
else:
self.__curL1 = self.__L1
self.__curL2 = self.__L2
self.__L1Tree.updateTree(l1Sent)
self.__L2Tree.updateTree(l2Sent)
self.__align = self.__parseAlign(alignLine, l1Index, l2Index)
self.__revAlign = self.__parseAlign(alignLine, l2Index, l1Index)
self.__csHash = dd(lambda:set())
def updateBadSwitch(self, index, l1Switch, l2Switch):
self.__csHash[index].add(l1Switch)
self.__csHash[index].add(l2Switch)
def __parseAlign(self, alignLine, l1Index, l2Index):
align = {}
for i in alignLine.split():
key = int(i.split("-")[l1Index])
value = int(i.split("-")[l2Index])
if key in align.keys():
align[key].append(value)
else:
align[key] = [value]
return align
def csSentence(self, csType):
validSequences = self.__utils.validSequences(self.__L1Tree.sentLen())
# Debugging !!
#sys.stderr.write("L1SeqL2Cont Valid Sequences:\n")
#for sequence in validSequences:
# sys.stderr.write(str(sequence)+"\n")
#dummy=raw_input()
###############
# Assumption that a sentence will have a single code switch.
sequence = self.__selectSequence(validSequences, csType)
# Debugging !!
##sys.stderr.write("Selected Sequence: "+str(sequence)+"\n")
##sys.stderr.write("Align:"+str(self.__align)+'\n')
#sys.stderr.write(l1Parse)
#sys.stderr.write(l2Parse)
#dummy=raw_input()
if sequence == -1:
return [-1,[]]
##print "Sequence:", sequence
csSentence = self.__utils.makeCSSentence(self.__L1Tree.wordTags(), sequence, self.__L2Tree.wordTags(), self.__align, self.__curL1, self.__curL2)
return [csSentence,sequence]
## Assumptions:
## There is always a single code switch
## The selection among the valid candidate sequences is random
def __selectSequence(self, validSequences, csType):
if csType == 0:
return self.__random(validSequences)
elif csType == 1:
return self.__seqL1SeqL2Cont(validSequences)
elif csType == 2:
return self.__seqL1Const()
elif csType == 4:
return self.__seqHindiClausal()
elif csType == 3:
return self.__seqL1ConstL2Const()
def __checkHindiClause(self, sequence, OBJ):
if frozenset(sequence) not in OBJ.heads:
return False
try:
head = OBJ.heads[frozenset(sequence)]
#print "Head:", head
if not OBJ.isChunkSubtree(head[1], sequence) and head[0] in self.__clausalChunks and not OBJ.hasNPChild(head[1]):
return True
except:
pass
return False
def __seqHindiClausal(self):
l1Sequence = -1
if self.__l1Index: ## Hindi is L2
subtrees = self.__L2Tree.subtrees
if len(subtrees) == 0:
return -1
count = 0
while 1:
l2Sequence = list(random.sample(subtrees,1)[0])
l1Sequence = self.__utils.l2Sequence(l2Sequence, self.__revAlign)
if len(l1Sequence) == self.__L1Tree.sentLen():
count += 1
continue
if len(l2Sequence) == self.__L2Tree.sentLen():
count += 1
continue
#if (frozenset(l2Sequence) in self.__L2Tree.heads and self.__L2Tree.heads[frozenset(l2Sequence)] in self.__clausalChunks and len(l1Sequence) > 0 )or count > 100:
if len(l2Sequence)>0 and len(l1Sequence)>0 and self.__checkHindiClause(l2Sequence, self.__L2Tree):
#if len(l1Sequence) == 0:
# print "l1Seq:",l1Sequence
# print "subtrees:", subtrees
# print "Count:", count
# dummy = raw_input(
return l1Sequence
count += 1
if count > 100:
break
else: ## Hin is L1
subtrees = self.__L1Tree.subtrees
if len(subtrees) == 0:
return -1
count = 0
while 1:
l1Sequence = list(random.sample(subtrees,1)[0])
if len(l1Sequence) == self.__L1Tree.sentLen():
count += 1
continue
l2Sequence = self.__utils.l2Sequence(l1Sequence, self.__align)
if len(l2Sequence) == self.__L2Tree.sentLen():
count += 1
continue
#if (frozenset(l1Sequence) in self.__L1Tree.heads and self.__L1Tree.heads[frozenset(l1Sequence)] in self.__clausalChunks and len(l2Sequence) > 0 )or count > 100:
if len(l1Sequence)>0 and len(l2Sequence)>0 and self.__checkHindiClause(l1Sequence, self.__L1Tree):
return l1Sequence
count += 1
if count > 100:
break
return -1
def __random(self, sequences):
random.seed()
l1Sequence = -1
count = 0
while 1:
l1Sequence = random.sample(sequences, 1)[0]
l2Sequence = self.__utils.l2Sequence(l1Sequence, self.__align)
if len(l2Sequence) > 0 or count > 100:
break
count += 1
return l1Sequence
def __randomStrict(self, sequences):
random.seed()
l1Sequence = -1
count = 0
while 1:
l1Sequence = random.sample(sequences, 1)[0]
l2Sequence = self.__utils.l2Sequence(l1Sequence, self.__align)
if len(l2Sequence) > 0:
return l1Sequence
count += 1
if count > 100:
break
return -1
def __seqL1SeqL2Cont(self, sequences):
random.seed()
sequenceIndex = -1
l1Sequence = -1
count = 0
while 1:
count += 1
if count%100 == 0:
return -1
sys.stderr.write("L1SeqL2Cont"+"InfLoop:"+str(count)+"\n")
sequenceIndex = random.randrange(len(sequences))
l1Sequence = sequences[sequenceIndex]
l2Sequence = self.__utils.l2Sequence(l1Sequence, self.__align)
if self.__L2Tree.isContiguous(l2Sequence):
# Debugging !!
#sys.stderr.write("Alignment: "+str(align)+"\n")
#sys.stderr.write("Contiguous l2Sequence: "+str(l2Sequence)+"\n")
##############
break
return l1Sequence
def __seqL1Const(self):
random.seed()
subtrees = self.__L1Tree.subtrees
l1Sequence = -1
if len(subtrees)>0:
count = 0
while 1:
l1Sequence = list(random.sample(subtrees,1)[0])
if len(l1Sequence) == self.__L1Tree.sentLen():
count += 1
continue
l2Sequence = self.__utils.l2Sequence(l1Sequence, self.__align)
if len(l2Sequence) > 0:
l1Sequence.sort()
return l1Sequence
count += 1
if count > 100:
break
return -1
def __seqL1LWG(self):
random.seed()
LWGs = self.__L1Tree.LWGs()
l1Sequence = -1
if len(LWGs)>0:
count = 0
while 1:
l1Sequence = list(random.sample(LWGs,1)[0])
if len(l1Sequence) == self.__L1Tree.sentLen():
count += 1
continue
l2Sequence = self.__utils.l2Sequence(l1Sequence, self.__align)
if len(l2Sequence) > 0:
l1Sequence.sort()
return l1Sequence
count += 1
if count > 100:
break
return -1
def __seqL1ConstL2Const(self):
random.seed()
subtrees = self.__L1Tree.subtrees
l1Sequence = -1
if len(subtrees)>0:
count = 0
while 1:
l1Sequence = list(random.sample(subtrees,1)[0])
if len(l1Sequence) == self.__L1Tree.sentLen():
count += 1
continue
l2Sequence = self.__utils.l2Sequence(l1Sequence, self.__align)
if frozenset(l2Sequence) in self.__L2Tree.subtrees:
l1Sequence.sort()
return l1Sequence
else:
##print "L1 Sentence:",self.__L1Tree.word_tags()
##print "L2 Sentence:",self.__L2Tree.word_tags()
##print "L1 Sequence:",l1Sequence
##print "L2 Sequence:", l2Sequence
##dummy = raw_input()
dummy = 1
count += 1
if count > 100:
break
return -1
def __seqL1LWGL2LWG(self):
random.seed()
LWGs = self.__L1Tree.LWGs()
l1Sequence = -1
if len(LWGs)>0:
count = 0
while 1:
l1Sequence = list(random.sample(LWGs,1)[0])
if len(l1Sequence) == self.__L1Tree.sentLen():
count += 1
continue
l2Sequence = self.__utils.l2Sequence(l1Sequence, self.__align)
if frozenset(l2Sequence) in self.__L2Tree.LWGs():
l1Sequence.sort()
return l1Sequence
else:
##print "L1 Sentence:",self.__L1Tree.word_tags()
##print "L2 Sentence:",self.__L2Tree.word_tags()
##print "L1 Sequence:",l1Sequence
##print "L2 Sequence:", l2Sequence
##dummy = raw_input()
dummy = 1
count += 1
if count > 100:
break
return -1
def __seqL1ConstL2Cont(self, sequences):
random.seed()
sequenceIndex = -1
l1Sequence = -1
count = 0
while 1:
count += 1
if count%100 == 0:
return -1
sys.stderr.write("L1Const2Cont"+"InfLoop:"+str(count)+"\n")
sequenceIndex = random.randrange(len(sequences))
l1Sequence = sequences[sequenceIndex]
l2Sequence = self.__utils.l2Sequence(l1Sequence, self.__align)
if self.__L1Tree.isConstituent(l1Sequence):
if self.__L2Tree.isContiguous(l2Sequence):
# Debugging !!
#sys.stderr.write("Alignment: "+str(align)+"\n")
#sys.stderr.write("Contiguous l2Sequence: "+str(l2Sequence)+"\n")
##############
break
return l1Sequence
def __seqL1ConstL2SameConst(self, sequences):
random.seed()
sequenceIndex = -1
l1Sequence =-1
count = 0
while 1:
count += 1
if count%500 == 0:
return -1
sys.stderr.write("L1Const2SameConst"+"InfLoop:"+str(count)+"\n")
sequenceIndex = random.randrange(len(sequences))
l1Sequence = sequences[sequenceIndex]
l2Sequence = self.__utils.l2Sequence(l1Sequence, self.__align)
if self.__L1Tree.isConstituent(l1Sequence):
if self.__L2Tree.isConstituent(l2Sequence):
l1PhraseTag = self.__L1Tree.getPhrase(l1Sequence[0])
l2PhraseTag = self.__L2Tree.getPhrase(l2Sequence[0])
## Both the phrases are same, for dual structure principle
if l1PhraseTag == l2PhraseTag or l2PhraseTag in self.__phraseMap[l1PhraseTag]:
# Debugging !!
#sys.stderr.write("Alignment: "+str(align)+"\n")
#sys.stderr.write("L2Sequence: "+str(l2Sequence)+" Same Const: "+l1PhraseTag+"\n")
##############
break
return l1Sequence
