def getResponse(self, inValue, inUnit, outFormat):
# Process values passed from the UI.
# Value
orig_value = float(inValue)
# Format
out_format = outFormat
if out_format != "json" and out_format != "json-ld":
raise ValueError("Invalid return format. Possible values are 'json' and 'json-ld'.")
# Unit
orig_unit = inUnit
quantity = self.decideContext(orig_unit)
base_unit = units.baseUnit(quantity)
print(RequestHandler.logString + "User query: " + str(orig_value) + " " + str(orig_unit) + ", return " + out_format)
print(RequestHandler.logString + "Quantity: " + str(quantity))
print(RequestHandler.logString + "Base unit: " + str(base_unit))
# Instance of GraphBuilder which builds the RDF graph.
graphBuilder = GraphBuilder()
# Start building the final RDF graph. The "request" and part of the "query"
# section are produced now.
try:
requestGraph = self.buildRequestGraph(graphBuilder, orig_unit, orig_value)
except Exception:
raise RuntimeError("Building the request graph failed!")
# For debugging:
#print(requestGraph.serialize(format='turtle'))
# Input is normalized to base unit.
norm_value = conv.convert(orig_value, orig_unit, quantity, RequestHandler.logString)
# Ask results from the wrappers.
finalGraph = self.getFinalGraph(quantity, norm_value, base_unit, graphBuilder, out_format, orig_unit, orig_value)
# Pass to calling method.
return finalGraph
def getResource(self, inWrapper, inValue, inUnit, inRange):
# Process values passed from the user.
# Wrapper
wrapper = inWrapper
if wrapper != "dbpedia" and wrapper != "worldbank" and wrapper != "wikidata":
raise ValueError("Invalid datasource. Possible values are 'dbpedia', 'worldbank', and 'wikidata'.")
# Value
orig_value = float(inValue)
# Range
range_decimal = float(inRange)
# Unit
orig_unit = inUnit
quantity = self.decideContext(orig_unit)
base_unit = units.baseUnit(quantity)
# Input is normalized to base unit.
query_value = conv.convert(orig_value, orig_unit, quantity, RequestHandler.logString)
print(RequestHandler.logString + "User query: " + str(orig_value) + " " + str(orig_unit) + ", range " + str(range_decimal))
print(RequestHandler.logString + "Quantity: " + str(quantity))
# Possible range of results:
range = range_decimal*query_value
# Instance of GraphBuilder which builds the RDF graph.
graphBuilder = GraphBuilder()
# Build request graph
try:
requestGraph = self.buildRequestGraph(graphBuilder, base_unit, query_value)
except Exception:
raise RuntimeError("Building the request graph failed!")
# For debugging:
#requestGraph.serialize(destination='graph_tests/interfaceRequestGraph.txt', format='turtle')
# Get data from wrapper
rdfResult = self.getData(wrapper, float(query_value), base_unit, float(range))
# Merge request and result (no factor here).
if rdfResult is not None:
# For debugging, uncomment:
#rdfResult.serialize(destination='graph_tests/interfaceResultGraph.txt', format='turtle')
# Test whether merging graphs works
try:
finalGraph = graphBuilder.mergeWithResultGraph(rdfResult)
except Exception:
raise RuntimeError("Merging request and result graphs failed!")
# Convert output graph to JSON-LD and save as file (for debugging).
#finalGraph.serialize(destination='graph_tests/interfaceFinalGraph_JSONLD.txt', format='json-ld', indent=4)
#finalGraph.serialize(destination='graph_tests/interfaceFinalGraph.txt', format='turtle')
# Return to API user.
print(finalGraph.serialize(format='json-ld', indent=4))
return finalGraph.serialize(format='json-ld', indent=4)
# If no result available:
else:
print("No results returned.")
return None