# -*- coding: utf-8 -*-
from p4l.utils import show_progress, get_code_from_language_uri
from p4l.models import Record, Language
from rdflib import Graph, Namespace, BNode, URIRef
from rdflib.plugins.sparql import prepareQuery
from django.core.management import BaseCommand
from optparse import make_option
import xml.etree.cElementTree as ET
from django.db import reset_queries, transaction
import traceback
import logging
import sys
logger = logging.getLogger(__name__)
RDF = Namespace("http://www.w3.org/1999/02/22-rdf-syntax-ns#")
RDFS = Namespace("http://www.w3.org/2000/01/rdf-schema#")
DCT = Namespace("http://purl.org/dc/terms/")
IIEP = Namespace("http://www.iiep.unesco.org/plan4learning/model.owl#")
UNESCO = Namespace("http://www.iiep.unesco.org/Ontology/")
DEFAULT_LANGUAGE_URI = "http://psi.oasis-open.org/iso/639/#eng"
DEFAULT_LANGUAGE_QUERY = """SELECT ( COALESCE(?lang, ?other_lang) as ?main_lang) WHERE {
OPTIONAL { ?s dct:language ?lang }.
OPTIONAL { ?s iiep:otherLanguage ?other_lang }.
}"""
class Command(BaseCommand):
args = "record_url ..."
help = "Import p4l record rdf format"
option_list = BaseCommand.option_list + (
make_option('-b', '--batch-size',
dest= 'batch_size',
type='int',
default= 50,
help= 'number of object to import in bulk operations'
),
)
def __init__(self, *args, **kwargs):
super(Command, self).__init__(*args, **kwargs)
self.__query_cache = {}
def __get_sparql_query(self, query, namespaces):
return self.__query_cache[query] \
if query in self.__query_cache \
else self.__query_cache.setdefault(query, prepareQuery(query, initNs=namespaces))
def get_empty_graph(self):
record_graph = Graph()
record_graph.bind('iiep',"http://www.iiep.unesco.org/plan4learning/model.owl#")
record_graph.bind('dct',"http://purl.org/dc/terms/")
return record_graph
def extract_single_value_form_graph(self, graph, q, bindings={}, index=0, convert=lambda v:unicode(v) if v is not None else None):
return next(self.extract_multiple_values_from_graph(graph, q, bindings, index, convert), None)
def extract_multiple_values_from_graph(self, graph, q, bindings={}, index=0, convert=lambda v:unicode(v) if v is not None else None):
index_list = index
if isinstance(index, int):
index_list = range(index+1)
if hasattr(convert, '__call__'):
convert_dict = dict((k, convert) for k in index_list)
else:
convert_dict = convert
convert_dict = dict((k, f if hasattr(f,'__call__') else lambda v:unicode(v) if v is not None else None) for k,f in convert_dict.iteritems())
for row in graph.query(self.__get_sparql_query(q, dict(graph.namespaces())), initBindings=bindings):
if len(row) < len(index_list):
break
else:
res = dict([ (k, convert_dict.get(k, lambda v:unicode(v) if v is not None else None)(v)) for k, v in zip(index_list, row)])
if isinstance(index, int):
yield res[index]
else:
yield res
def convert_bool(self, val):
if val == True or val == False:
return val
if val is None:
return False
if isinstance(val, basestring):
if len(val) == 0:
return False
if val[0].lower() in ['t','y','1','o']:
return True
else:
return False
return bool(val)
def convert_lang(self, val, default_lang):
return unicode(val) if (val is not None and len(unicode(val))>0) else default_lang
def get_record_default_language(self, g, record_uri):
lang_uri = self.extract_single_value_form_graph(g, DEFAULT_LANGUAGE_QUERY, bindings={'s': URIRef(record_uri)})
if not lang_uri:
lang_uri = DEFAULT_LANGUAGE_URI
lang_code = get_code_from_language_uri(lang_uri)
if lang_code is None:
logger.warn("get_record_default_language: no code found for %s in record %s" % (lang_uri, record_uri))
return get_code_from_language_uri(DEFAULT_LANGUAGE_URI)
return lang_code
def add_to_related_collection(self, coll, graph, fields, q, bindings={}, convert=lambda v: unicode(v) if v is not None else None, through_fields=None):
for val in self.extract_multiple_values_from_graph(graph, q, bindings=bindings, index=fields, convert=convert):
if through_fields:
new_obj_val = dict([(k,v) for k,v in val.iteritems() if k not in through_fields])
else:
new_obj_val = val
if hasattr(coll, 'through'):
new_obj_rel, _ = coll.model.objects.get_or_create(**new_obj_val)
if through_fields:
through_vals = {coll.source_field_name: coll.instance, coll.target_field_name: new_obj_rel}
through_vals.update(dict([(k,v) for k,v in val.iteritems() if k in through_fields]))
coll.through.objects.create(**through_vals)
new_obj = None
else:
new_obj = new_obj_rel
else:
new_obj = coll.create(**new_obj_val)
if new_obj:
coll.add(new_obj)
def build_record(self, graph):
record_uri = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?s WHERE { ?s rdf:type iiep:Record .}")
default_language_code = self.get_record_default_language(graph, record_uri)
record = Record()
record.uri = record_uri
record.identifier = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?o WHERE { ?s dct:identifier ?o .}", bindings={'s':URIRef(record.uri)})
record.notes = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?o WHERE { ?s iiep:notes ?o .}", bindings={'s':URIRef(record.uri)})
record.recordType = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?o WHERE { ?s dct:type ?o .}", bindings={'s':URIRef(record.uri)})
record.isDocumentPart = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?o WHERE { ?s iiep:isDocumentPart ?o .}", bindings={'s':URIRef(record.uri)}, convert=self.convert_bool)
record.editionStatement = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?o WHERE { ?s iiep:editionStatement ?o .}", bindings={'s':URIRef(record.uri)})
language = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?o WHERE { ?s dct:language ?o .}", bindings={'s':URIRef(record.uri)})
if language:
record.language, _ = Language.objects.get_or_create(language=language)
record.save()
self.add_to_related_collection(record.otherLanguages, graph, ['language'], "SELECT ?o WHERE { ?s iiep:otherLanguage ?o .}", bindings={'s':URIRef(record.uri)})
self.add_to_related_collection(record.subjects, graph, ['subject'], "SELECT ?o WHERE { ?s dct:subject ?o .}", bindings={'s':URIRef(record.uri)})
self.add_to_related_collection(record.themes, graph, ['theme'], "SELECT ?o WHERE { ?s iiep:theme ?o .}", bindings={'s':URIRef(record.uri)})
self.add_to_related_collection(record.countries, graph, ['country'], "SELECT ?o WHERE { ?s iiep:country ?o .}", bindings={'s':URIRef(record.uri)})
self.add_to_related_collection(record.authors, graph, ['name'], "SELECT ?o WHERE { ?s iiep:author ?o .}", bindings={'s':URIRef(record.uri)})
self.add_to_related_collection(record.subjectPersons, graph, ['name'], "SELECT ?o WHERE { ?s iiep:subjectPerson ?o .}", bindings={'s':URIRef(record.uri)})
self.add_to_related_collection(record.projectNames, graph, ['label','acronym'], "SELECT ?l ?a WHERE { [ iiep:projectName ?bnode ]. ?bnode rdfs:label ?l. OPTIONAL { ?bnode iiep:acronym ?a } }")
self.add_to_related_collection(
record.periodicals,
graph,
['label','lang'],
"SELECT DISTINCT ?o ( lang(?o) as ?l) WHERE { ?s iiep:periodical ?o .}",
bindings={'s':URIRef(record.uri)},
convert={'lang':lambda l: self.convert_lang(l, default_language_code)},
through_fields = ['lang']
)
self.add_to_related_collection(
record.meetings,
graph,
['label', 'meetingNumber', 'meetingPlace', 'meetingDate', 'meetingYear', 'lang'],
"SELECT ?l ?mn ?mp ?md ?my (lang(COALESCE(?l,?nm, ?mp,?md,?my)) as ?lang) WHERE { [iiep:meeting ?bnode]. OPTIONAL { ?bnode rdfs:label ?l }. OPTIONAL { ?bnode iiep:meetingNumber ?mn }. OPTIONAL { ?bnode iiep:meetingPlace ?mp }. OPTIONAL { ?bnode iiep:meetingDate ?md }. OPTIONAL { ?bnode iiep:meetingYear ?my }}",
convert={'lang':lambda l: self.convert_lang(l, default_language_code), 'meetingYear' : lambda y: int(y) if y is not None else None},
through_fields = ['lang']
)
self.add_to_related_collection(
record.series,
graph,
['title', 'volume', 'lang'],
"SELECT ?t ?vol (lang(COALESCE(?t,?vol)) as ?lang) WHERE { [iiep:serie ?bnode]. OPTIONAL { ?bnode dct:title ?t }. OPTIONAL { ?bnode iiep:volume ?vol } }",
convert={'lang':lambda l: self.convert_lang(l, default_language_code)},
through_fields = ['lang']
)
self.add_to_related_collection(
record.subjectCorporateBodies,
graph,
['label', 'acronym'],
"SELECT ?l ?a WHERE { [iiep:subjectCorporateBody ?bnode]. OPTIONAL { ?bnode rdfs:label ?l }. OPTIONAL { ?bnode iiep:acronym ?a } }",
)
self.add_to_related_collection(
record.subjectMeetings,
graph,
['label', 'meetingNumber', 'meetingPlace', 'meetingDate', 'meetingYear'],
"SELECT ?l ?mn ?mp ?md ?my WHERE { [iiep:meeting ?bnode]. OPTIONAL { ?bnode rdfs:label ?l }. OPTIONAL { ?bnode iiep:meetingNumber ?mn }. OPTIONAL { ?bnode iiep:meetingPlace ?mp }. OPTIONAL { ?bnode iiep:meetingDate ?md }. OPTIONAL { ?bnode iiep:meetingYear ?my }}",
convert={'meetingYear' : lambda y: int(y) if y is not None else None}
)
self.add_to_related_collection(
record.corporateAuthors,
graph,
['label', 'acronym'],
"SELECT ?l ?a WHERE { [iiep:corporateAuthor ?bnode]. OPTIONAL { ?bnode rdfs:label ?l }. OPTIONAL { ?bnode iiep:acronym ?a } }",
)
self.add_to_related_collection(
record.issns,
graph,
['issn', 'lang'],
"SELECT ?issn (lang(COALESCE(?issn)) as ?lang) WHERE { ?s iiep:issn ?issn . }",
bindings={'s':URIRef(record.uri)},
convert={'lang':lambda l: self.convert_lang(l, default_language_code)}
)
self.add_to_related_collection(
record.isbns,
graph,
['isbn', 'lang'],
"SELECT ?isbn (lang(COALESCE(?isbn)) as ?lang) WHERE { ?s iiep:isbn ?isbn . }",
bindings={'s':URIRef(record.uri)},
convert={'lang':lambda l: self.convert_lang(l, default_language_code)}
)
self.add_to_related_collection(
record.documentCodes,
graph,
['documentCode', 'lang'],
"SELECT ?c (lang(COALESCE(?c)) as ?lang) WHERE { ?s iiep:documentCode ?c . }",
bindings={'s':URIRef(record.uri)},
convert={'lang':lambda l: self.convert_lang(l, default_language_code)}
)
self.add_to_related_collection(
record.titles,
graph,
['title', 'lang'],
"SELECT ?t (lang(COALESCE(?t)) as ?lang) WHERE { ?s dct:title ?t . }",
bindings={'s':URIRef(record.uri)},
convert={'lang':lambda l: self.convert_lang(l, default_language_code)}
)
self.add_to_related_collection(
record.addedTitles,
graph,
['title', 'lang'],
"SELECT ?t (lang(COALESCE(?t)) as ?lang) WHERE { ?s iiep:addedTitle ?t . }",
bindings={'s':URIRef(record.uri)},
convert={'lang':lambda l: self.convert_lang(l, default_language_code)}
)
self.add_to_related_collection(
record.titlesMainDocument,
graph,
['title', 'lang'],
"SELECT ?t (lang(COALESCE(?t)) as ?lang) WHERE { ?s iiep:titleMainDocument ?t . }",
bindings={'s':URIRef(record.uri)},
convert={'lang':lambda l: self.convert_lang(l, default_language_code)}
)
self.add_to_related_collection(
record.imprints,
graph,
['imprintCity', 'publisher', 'imprintDate', 'lang'],
"SELECT ?c ?p ?d (lang(COALESCE(?c, ?p, ?d)) as ?lang) WHERE { [ iiep:imprint ?bnode ]. OPTIONAL { ?bnode iiep:imprintCity ?c }. OPTIONAL { ?bnode dct:publisher ?p }. OPTIONAL { ?bnode iiep:imprintDate ?d }}",
convert={'lang':lambda l: self.convert_lang(l, default_language_code)}
)
self.add_to_related_collection(
record.collations,
graph,
['collation', 'lang'],
"SELECT ?c (lang(COALESCE(?c)) as ?lang) WHERE { ?s iiep:collation ?c . }",
bindings={'s':URIRef(record.uri)},
convert={'lang':lambda l: self.convert_lang(l, default_language_code)}
)
self.add_to_related_collection(
record.volumeIssues,
graph,
['volume', 'number', 'lang'],
"SELECT ?v ?n (lang(COALESCE(?v, ?n)) as ?lang) WHERE { [ iiep:volumeIssue ?bnode ]. OPTIONAL { ?bnode iiep:volume ?v }. OPTIONAL { ?bnode iiep:number ?v }}",
convert={'lang':lambda l: self.convert_lang(l, default_language_code)}
)
self.add_to_related_collection(
record.urls,
graph,
['address', 'display', 'accessLevel'],
"SELECT ?a ?d ?al WHERE { [ iiep:url ?bnode ]. OPTIONAL { ?bnode iiep:address ?a }. OPTIONAL { ?bnode iiep:display ?d }. OPTIONAL { ?bnode iiep:accessLevel ?al }.}",
)
return record
def filter_node(self, node, graph, res_graph):
for p,o in graph[node]:
res_graph.add((node,p,o))
if isinstance(o, BNode):
self.filter_node(o, graph, res_graph)
def calculate_records_nb(self, records_url):
context = ET.iterparse(records_url, events=("end",))
i = 0
for _,elem in context:
if elem.tag == "{%s}Record" % IIEP:
i += 1
return i
def process_url(self, records_url, options):
total_records = self.calculate_records_nb(records_url)
writer = None
errors=[]
context = ET.iterparse(records_url, events=("end",))
i = 0
for event,elem in context:
if elem.tag == "{%s}Record" % IIEP:
i += 1
writer = show_progress(i, total_records, "Processing record nb %d " % i, 50, writer=writer)
try:
record_graph = self.get_empty_graph()
record_graph.parse(data=ET.tostring(elem, encoding='utf-8'), format='xml')
# add transaction management
self.build_record(record_graph)
except Exception as e:
transaction.rollback()
msg = "Error processing resource %d in %s : %s" % (i, records_url, repr(e))
logger.exception(msg)
errors.append((i, records_url, msg))
else:
transaction.commit()
if i%self.batch_size == 0:
reset_queries()
return errors
# def process_url(self, records_url, options):
# #open graph with rdflib
# #TODO: manage memory
# g = Graph()
# print("Loading %s" % records_url)
# g.parse(records_url)
# print("Parsing %s done" % records_url)
# for i,record_uri in enumerate(g[:RDF.type:IIEP.Record]):
# print(i, repr(record_uri))
# record_graph = self.get_empty_graph()
# self.filter_node(record_uri, g, record_graph)
# self.build_record(record_graph)
# if i > 3:
# break
def handle(self, *args, **options):
self.batch_size = options.get('batch_size', 50)
transaction.enter_transaction_management()
transaction.managed(True)
for records_url in args:
print("Processing %s" % records_url)
errors = self.process_url(records_url, options)
print("Processing %s Done" % records_url)
if errors:
print("%d error(s) when processing %s, check your log file." % (len(errors), records_url))
transaction.leave_transaction_management()