def init(endpoint="http://dbpedia.org/sparql"):
LogManager.LogInfo(f"Initializing SPARQLEndpointManager...")
try:
SPARQLEndpointManager.endpoint = endpoint
SPARQLEndpointManager.sparql = SPARQLWrapper(endpoint)
except Exception as e:
LogManager.LogError(f"Failed to initialize SPARQLEndpointManager")
LogManager.LogError(e)
def SendQuery(query, returnFormat=JSON):
LogManager.LogInfo(
f"Sending query to endpoint {SPARQLEndpointManager.endpoint}")
try:
SPARQLEndpointManager.sparql.setQuery(query)
SPARQLEndpointManager.sparql.setReturnFormat(returnFormat)
results = SPARQLEndpointManager.sparql.query().convert()
return results
except Exception as e:
LogManager.LogError(
f"Unable to Send query to {SPARQLEndpointManager.endpoint}")
LogManager.LogError(e)
return None
def GetQueryPrefixes(self, query):
LogManager.LogInfo(f"Extracting prefixes from query...")
prefixes = []
inlineQuery = query.replace('\n', ' ').replace('\t', '')
queryRegex = r'(.*)[Ss][Ee][Ll][Ee][Cc][Tt](.*)'
matchPrefixes = re.match(queryRegex, inlineQuery)
if not matchPrefixes:
LogManager.LogInfo(f"No prefixes found")
return None
allPrefixes = matchPrefixes.group(1)
nPrefixes = [i.lstrip(' ') for i in allPrefixes.split('>') if i != ' ']
nPrefixes = [i + '>' for i in nPrefixes if i != '']
for prefix in nPrefixes:
prefxRegex = '[Pp][Rr][Ee][Ff][Ii][Xx](.*?):'
matchPrefix = re.match(prefxRegex, prefix)
if not matchPrefix:
LogManager.LogError("Invalid Prefixes")
return None
prefixes.append((matchPrefix.group(1).lstrip(' '), prefix))
LogManager.LogInfo(
f"Prefixes extracted successfully! Prefixes: {prefixes}")
return prefixes
def SendQueryForLabel(variable, prefixes='', returnFormat=JSON):
LogManager.LogInfo(
f"Sending query to endpoint {SPARQLEndpointManager.endpoint} for getting label of {variable}"
)
stringPrefixes = [pref[1]
for pref in prefixes] if prefixes != '' else ['']
query = ' '.join(
stringPrefixes
) + ' SELECT ?label WHERE { ' + variable + ' <http://www.w3.org/2000/01/rdf-schema#label> ' + '?label . }'
try:
SPARQLEndpointManager.sparql.setQuery(query)
SPARQLEndpointManager.sparql.setReturnFormat(returnFormat)
results = SPARQLEndpointManager.sparql.query().convert()
return results["results"]["bindings"][0]["label"]["value"] if len(
results["results"]["bindings"]) > 0 else ''
except Exception as e:
LogManager.LogError(
f"Unable to Send query to {SPARQLEndpointManager.endpoint}")
LogManager.LogError(e)
return None
def __init__(self, query):
LogManager.LogInfo(f"Starting Verbalize Manager...")
self.answer = None
self.parser = SPARQLParserManager(query)
if self.parser.queryIsValid:
self.answer = self.Verbalize(self.parser.queryVariable[0],
self.parser.queryTriples,
self.parser.queryAnswer,
self.parser.queryPrefixes)
else:
LogManager.LogError(f"Invalid query syntax for query:\n{query}")
self.answer = self.parser.queryError
def init(queriesNum=10):
LogManager.LogInfo(
f"Initializing XMLManager and getting latest version and queries..."
)
try:
VersionHistory = ET.parse('VersionHistory.xml')
Versions = [
Version for Version in VersionHistory.findall('Version')
]
XMLManager.latestVersion = Versions[-1].attrib['ID']
except IOError:
LogManager.LogError(f"Unable to get latest version from file")
try:
XMLManager.sampleQueriesNum = queriesNum
SolideQueries = ET.parse('queries.xml')
XMLManager.queries = [
(question[0].text, question[1].text)
for question in SolideQueries.findall('question')
]
XMLManager.labels = [label[0] for label in XMLManager.queries]
except IOError:
LogManager.LogError(f"Unable to get queries from file")
def SendQueryForType(variable,
labelTriple,
prefixes='',
returnFormat=JSON):
LogManager.LogInfo(
f"Sending query to endpoint {SPARQLEndpointManager.endpoint} for getting type of {variable}"
)
stringLabelTriple = f'{labelTriple[0][0]} {labelTriple[0][1]} "{labelTriple[0][2]}"'
stringPrefixes = [pref[1]
for pref in prefixes] if prefixes != '' else ['']
query = ' '.join(
stringPrefixes
) + ' SELECT DISTINCT ?type WHERE { ' + variable + ' <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ' + '?type . ' + stringLabelTriple + ' } LIMIT 1'
try:
SPARQLEndpointManager.sparql.setQuery(query)
SPARQLEndpointManager.sparql.setReturnFormat(returnFormat)
results = SPARQLEndpointManager.sparql.query().convert()
return results["results"]["bindings"][0]["type"]["value"] if len(
results["results"]["bindings"]) > 0 else ''
except Exception as e:
LogManager.LogError(
f"Unable to Send query to {SPARQLEndpointManager.endpoint}")
LogManager.LogError(e)
return None