class LoadBox(W.HBox):
formats = ",".join(["." + ext for ext in SUFFIX_FORMAT_MAP.keys()])
graph = T.Instance(Graph)
graph_id = T.Instance(BNode)
label = T.Instance(W.Label)
file_upload = T.Instance(W.FileUpload)
file_upload_value = T.Dict()
log = W.Output()
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.children = tuple([self.label, self.file_upload])
T.dlink((self.file_upload, "value"), (self, "file_upload_value"))
@T.default("graph")
def make_default_graph(self):
return Graph()
@T.default("graph_id")
def make_default_graph_id(self):
return self.graph.identifier
@T.default("label")
def make_default_label(self):
label = W.Label(value="Click to load file:")
return label
@T.default("file_upload")
def make_default_file_upload(self):
# TODO support multiple files
file_upload = W.FileUpload(accept=self.formats, multiple=False)
return file_upload
@T.observe("file_upload_value")
def process_files(self, change):
# TODO loader for files (not needed until support for >1 file)
# size is in bytes
file_graphs = {}
for file_name, data in change.new.items():
assert "metadata" and "content" in data
assert file_name not in file_graphs
file_graphs[file_name] = {}
file_graphs[file_name]["metadata"] = data["metadata"]
file_format = guess_format(file_name)
if file_format is None:
raise ValueError("Unknown file format.")
g = Graph().parse(data=data["content"], format=file_format)
file_graphs[file_name]["graph"] = g
file_graphs[file_name]["metadata"]["length"] = len(g)
# TODO combine graphs when multiple=True
self.graph = g
self.graph_id = g.identifier
namespace_manager = NamespaceManager(Graph())
namespace_manager.bind('dcat', DCAT)
namespace_manager.bind('dct', DCT)
namespace_manager.bind('foaf', FOAF)
namespace_manager.bind('foaf', FOAF)
namespace_manager.bind('hydra', HYDRA)
namespace_manager.bind('rdfs', RDFS)
namespace_manager.bind('scv', SCV)
namespace_manager.bind('skos', SKOS)
namespace_manager.bind('vcard', VCARD)
namespace_manager.bind('xsd', XSD)
namespace_manager.bind('freq', FREQ)
# Support JSON-LD in format detection
FORMAT_MAP = SUFFIX_FORMAT_MAP.copy()
FORMAT_MAP['json'] = 'json-ld'
FORMAT_MAP['jsonld'] = 'json-ld'
FORMAT_MAP['xml'] = 'xml'
# Map serialization formats to MIME types
RDF_MIME_TYPES = {
'xml': 'application/rdf+xml',
'n3': 'text/n3',
'turtle': 'application/x-turtle',
'nt': 'application/n-triples',
'json-ld': 'application/ld+json',
'trig': 'application/trig',
# Available but not activated
# 'nquads': 'application/n-quads',
# 'trix': 'text/xml',
def rdf_suffix(fmt: str) -> str:
""" Map the RDF format to the approproate suffix """
for k, v in SUFFIX_FORMAT_MAP.items():
if fmt == v:
return k
return 'rdf'
def rdf_suffix(fmt: str) -> str:
""" Map the RDF format to the approproate suffix """
for k, v in SUFFIX_FORMAT_MAP.items():
if fmt == v:
return k
return 'rdf'
namespace_manager = NamespaceManager(Graph())
namespace_manager.bind('dcat', DCAT)
namespace_manager.bind('dct', DCT)
namespace_manager.bind('foaf', FOAF)
namespace_manager.bind('foaf', FOAF)
namespace_manager.bind('hydra', HYDRA)
namespace_manager.bind('rdfs', RDFS)
namespace_manager.bind('scv', SCV)
namespace_manager.bind('skos', SKOS)
namespace_manager.bind('vcard', VCARD)
namespace_manager.bind('xsd', XSD)
namespace_manager.bind('freq', FREQ)
# Support JSON-LD in format detection
FORMAT_MAP = SUFFIX_FORMAT_MAP.copy()
FORMAT_MAP['json'] = 'json-ld'
FORMAT_MAP['jsonld'] = 'json-ld'
FORMAT_MAP['xml'] = 'xml'
# Map serialization formats to MIME types
RDF_MIME_TYPES = {
'xml': 'application/rdf+xml',
'n3': 'text/n3',
'turtle': 'application/x-turtle',
'nt': 'application/n-triples',
'json-ld': 'application/ld+json',
'trig': 'application/trig',
# Available but not activated
# 'nquads': 'application/n-quads',
# 'trix': 'text/xml',