def __init__(self, config_file=CONFIG_FILE):
self.X = None
self.config = ConfigParser.RawConfigParser()
self.config.read(config_file)
# self.total_query = self.config.getint('DBpedia','TotalQuery')
# self.query_file = self.config.get('DBpedia','QueryFile')
self.dbp_prefix_file = self.config.get("DBpedia", "Namespaces")
# self.f_extractor = FeatureExtractor()
self.sp_util = SarqlUtil(self.dbp_prefix_file)
self.queries = list()
self.distance_hungarian_script = self.config.get("QueryClustering", "DistanceHungarian")
self.K = self.config.getint("QueryClustering", "K")
self.random_shuffel_max_iters = self.config.getint("QueryClustering", "RandomShuffelMaxIters")
self.kmediods_max_iters = self.config.getint("QueryClustering", "KmediodsMaxIters")
self.cluster_cach_file = self.config.get("QueryClustering", "HungarianClusterCach")
self.center_cach_file = self.config.get("QueryClustering", "HungarianCenterCach")
self.training_query_file = self.config.get("Query", "TrainingQuery")
self.training_algebra_feature_file = self.config.get("Query", "TrainingAlgebraFeatures")
self.training_execution_times_file = self.config.get("Query", "TrainingQueryExecutionTimes")
self.validation_query_file = self.config.get("Query", "ValidationQuery")
self.test_query_file = self.config.get("Query", "TestQuery")
self.distance_matrix_file = self.config.get("QueryClustering", "TrainingDistanceHungarianMatrix")
self.center_idxs = None
self.idx = None
class ClusterSparql:
"""Cluster sparql"""
def __init__(self, config_file=CONFIG_FILE):
self.X = None
self.config = ConfigParser.RawConfigParser()
self.config.read(config_file)
# self.total_query = self.config.getint('DBpedia','TotalQuery')
# self.query_file = self.config.get('DBpedia','QueryFile')
self.dbp_prefix_file = self.config.get("DBpedia", "Namespaces")
# self.f_extractor = FeatureExtractor()
self.sp_util = SarqlUtil(self.dbp_prefix_file)
self.queries = list()
self.distance_hungarian_script = self.config.get("QueryClustering", "DistanceHungarian")
self.K = self.config.getint("QueryClustering", "K")
self.random_shuffel_max_iters = self.config.getint("QueryClustering", "RandomShuffelMaxIters")
self.kmediods_max_iters = self.config.getint("QueryClustering", "KmediodsMaxIters")
self.cluster_cach_file = self.config.get("QueryClustering", "HungarianClusterCach")
self.center_cach_file = self.config.get("QueryClustering", "HungarianCenterCach")
self.training_query_file = self.config.get("Query", "TrainingQuery")
self.training_algebra_feature_file = self.config.get("Query", "TrainingAlgebraFeatures")
self.training_execution_times_file = self.config.get("Query", "TrainingQueryExecutionTimes")
self.validation_query_file = self.config.get("Query", "ValidationQuery")
self.test_query_file = self.config.get("Query", "TestQuery")
self.distance_matrix_file = self.config.get("QueryClustering", "TrainingDistanceHungarianMatrix")
self.center_idxs = None
self.idx = None
# print self.total_query
# print self.query_file, type(self.query_file)
def load_queries_dbp_log(self):
f = open(self.query_file, "rb")
count = 0
for line in f:
# print line
if count >= self.total_query:
break
try:
sparql_query = self.sp_util.dbp_log_to_sparql(line)
# sparql_query = self.sp_util.get_dbp_sparql(sparql_query)
# print sparql_query
count += 1
self.queries.append(sparql_query)
except:
pass
self.X = np.array(self.queries).transpose()
def load_training_queries(self, limit=None):
# if limit == None:
# limit = int(self.total_query*0.6)
print "loading training queries:", self.training_query_file
f = open(self.training_query_file, "rb")
count = 0
for line in f:
# print line
# if count >= limit:
# break
try:
# sparql_query = self.sp_util.url_to_sparql(line)
# for the dbpsb queries, had to add /sparql/? to make it valid for url parsing
sparql_query = self.sp_util.url_to_sparql("/sparql/?" + line)
# print sparql_query
count += 1
self.queries.append(sparql_query)
except Exception as inst:
print "Exception", inst
self.X = np.array(self.queries).transpose()
def distance_hungarian(self, q1, q2):
tmp_q1_file = "tmp_q1_file~"
# print query_str
dbp_query1 = self.sp_util.get_dbp_sparql(q1)
tq1 = open(tmp_q1_file, "w")
tq1.write(dbp_query1)
tq1.close()
tmp_q2_file = "tmp_q2_file~"
# print query_str
dbp_query2 = self.sp_util.get_dbp_sparql(q2)
tq2 = open(tmp_q2_file, "w")
tq2.write(dbp_query2)
tq2.close()
cmd = self.distance_hungarian_script + " --file" + " " + tmp_q1_file + " " + tmp_q2_file
(status, abs_query_str) = commands.getstatusoutput(cmd)
# print abs_query_str
if status != 0:
# print "ged error", (status,abs_query_str)
raise Exception("GED error status: " + str(status) + " " + abs_query_str)
# print abs_query_str
return float(abs_query_str)
def compute_distance_matrix_real_time(self, distance_function=distance_hungarian):
self.distance_matrix = k_mediods.compute_symmetric_distance(self.X, distance_function)
distance_filename = self.distance_cach_filename(distance_function)
np.save(distance_filename, self.distance_matrix)
def compute_distance_matrix_from_cach(self, distance_function=distance_hungarian):
distance_filename = self.distance_cach_filename(distance_function)
self.distance_matrix = np.load(distance_filename + ".npy")
def distance_cach_filename(self, distance_function):
file_name = "distance_matrix"
file_name = self.distance_function_name(distance_function) + "_hungarian"
file_name = file_name + "_cach"
return file_name
def distance_function_name(self, distance_function):
"""
MODIFY THIS WHEN NEW distance_function is added
"""
if distance_function == self.distance_hungarian:
return "_hungarian"
return ""
def save_clusters(self, distance_function):
# df_name = self.distance_function_name(distance_function)
# np.save(self.cluster_cach_file,self.idx)
# np.save(self.center_cach_file,self.center_idxs)
np.savetxt(self.cluster_cach_file, self.idx, fmt="%d")
np.savetxt(self.center_cach_file, self.center_idxs, fmt="%d")
def predict_cluster(self, Xi, distance_function, url_to_sparql=False):
if url_to_sparql == True:
Xi = self.sp_util.url_to_sparql(Xi)
# if self.idx == None:
# self.idx = np.load(elf.cluster_cach_file+'.npy')
if self.center_idxs == None:
self.center_idxs = np.load(self.center_cach_file + df_name + ".npy")
min_dist = np.inf
min_k = -1
for k in self.center_idxs:
k_Xi = self.X[k]
# print k_Xi
d = distance_function(Xi, k_Xi)
if min_dist > d:
min_dist = d
min_k = k
# print "original:", Xi
# print "prediction:",self.X[min_k]
return min_k
def cluster_queries(self, distance_function):
# (min_center_idxs,min_cost) = k_mediods.initial_random_centers_cost_minimization(self.X ,self.K,self.distance_matrix,self.random_shuffel_max_iters,self.kmediods_max_iters)
# print "min model cost: ", min_cost
(initial_centers, min_center_idxs) = k_mediods.initial_random_centers(self.X, self.K)
(self.center_idxs, self.idx) = k_mediods.k_mediods(
self.X, min_center_idxs, self.kmediods_max_iters, self.distance_matrix
)
# k_mediods.print_clusters(self.X, self.idx, self.center_idxs)
total_cost = k_mediods.model_cost(self.X, self.idx, self.center_idxs, self.distance_matrix)
print "model cost: ", total_cost
self.save_clusters(distance_function)
def load_distaince_hungarian_matrix(self):
"""
Must be called after loading training queries
"""
m = np.size(self.X, 0)
print "m:", m
self.distance_matrix = np.zeros((m, m), dtype=float)
f = open(self.distance_matrix_file)
for line in f:
row = line.split()
i = int(row[0])
j = int(row[1])
d = float(row[2])
# print i,j,d
self.distance_matrix[i, j] = d
self.distance_matrix[j, i] = d