--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/p4l/mapping/parsers.py Fri Sep 20 10:34:49 2013 +0200
@@ -0,0 +1,279 @@
+# -*- coding: utf-8 -*-
+'''
+Created on Sep 20, 2013
+
+@author: ymh
+'''
+from rdflib.plugins.sparql.processor import prepareQuery
+from rdflib.term import URIRef
+from p4l.models.data import Language, Record
+
+
+class QueryCache(object):
+ def __init__(self, *args, **kwargs):
+ self.__query_cache = {}
+
+ def get_sparql_query(self, query, namespaces_dict):
+ return self.__query_cache.get(query, False) \
+ or self.__query_cache.setdefault(query, prepareQuery(query, initNs=namespaces_dict))
+
+
+def convert_bool(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)
+
+class RecordParser(object):
+
+
+ def __init__(self, query_cache = None):
+ self.query_cache = None
+ if self.query_cache is None:
+ self.query_cache = QueryCache()
+
+ def extract_single_value_form_graph(self, graph, q, bindings={}, index=0, convert=lambda v:unicode(v) if v is not None else None, default=None):
+ return next(self.extract_multiple_values_from_graph(graph, q, bindings, index, convert), default)
+
+ 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.query_cache.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 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, delete=True):
+
+ record_uri = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?s WHERE { ?s rdf:type iiep:Record .}")
+ record_identifier = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?o WHERE { ?s dct:identifier ?o .}", bindings={'s':URIRef(record_uri)})
+
+ if delete:
+ Record.objects.filter(identifier=record_identifier).delete()
+
+ record = Record()
+ record.uri = record_uri
+ record.identifier = record_identifier
+ 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, default=False)
+ record.hidden = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?o WHERE { ?s iiep:hidden ?o .}", bindings={'s':URIRef(record.uri)}, convert=self.convert_bool, default=False)
+ record.restricted = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?o WHERE { ?s iiep:restricted ?o .}", bindings={'s':URIRef(record.uri)}, convert=self.convert_bool, default=False)
+ record.editionStatement = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?o WHERE { ?s iiep:editionStatement ?o .}", bindings={'s':URIRef(record.uri)})
+ record.corporateAuthorLabel = self.extract_single_value_form_graph(graph,"SELECT DISTINCT ?o WHERE { ?s iiep:corporateAuthorLabel ?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(uri=language)
+
+ record.save()
+
+ self.add_to_related_collection(record.otherLanguages, graph, ['uri'], "SELECT ?o WHERE { ?s iiep:otherLanguage ?o .}", bindings={'s':URIRef(record.uri)})
+ self.add_to_related_collection(record.subjects, graph, ['uri'], "SELECT ?o WHERE { ?s dct:subject ?o .}", bindings={'s':URIRef(record.uri)})
+ self.add_to_related_collection(record.themes, graph, ['uri'], "SELECT ?o WHERE { ?s iiep:theme ?o .}", bindings={'s':URIRef(record.uri)})
+ self.add_to_related_collection(record.countries, graph, ['uri'], "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, ['uri'], "SELECT ?o WHERE { ?s iiep:projectName ?o . }")
+ self.add_to_related_collection(record.audiences, graph, ['uri'], "SELECT ?o WHERE { ?s dct:audience ?o .}", bindings={'s':URIRef(record.uri)})
+
+ 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)}
+ )
+
+ 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={'meetingYear' : lambda y: int(y) if y is not None else None}
+ )
+
+ 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 } }",
+ )
+
+ self.add_to_related_collection(
+ record.subjectCorporateBodies,
+ graph,
+ ['uri'],
+ "SELECT ?o WHERE { ?s iiep:subjectCorporateBody ?o. }",
+ bindings={'s':URIRef(record.uri)}
+ )
+
+ self.add_to_related_collection(
+ record.subjectMeetings,
+ graph,
+ ['label', 'meetingNumber', 'meetingPlace', 'meetingDate', 'meetingYear'],
+ "SELECT ?l ?mn ?mp ?md ?my WHERE { [iiep:subjectMeeting ?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,
+ ['uri'],
+ "SELECT ?o WHERE { ?s iiep:corporateAuthor ?o.}",
+ bindings={'s':URIRef(record.uri)}
+ )
+
+ 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)},
+ )
+
+ 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)},
+ )
+
+ 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)},
+ )
+
+ 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)},
+ )
+
+ self.add_to_related_collection(
+ record.abstracts,
+ graph,
+ ['abstract', 'lang'],
+ "SELECT ?t (lang(COALESCE(?t)) as ?lang) WHERE { ?s dct:abstract ?t . }",
+ bindings={'s':URIRef(record.uri)},
+ )
+
+ 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)},
+ )
+
+ 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)},
+ )
+
+ 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 }}",
+ )
+
+ 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)},
+ )
+
+ 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 ?n }}",
+ )
+
+ self.add_to_related_collection(
+ record.urls,
+ graph,
+ ['address', 'display'],
+ "SELECT ?a ?d WHERE { [ iiep:url ?bnode ]. OPTIONAL { ?bnode iiep:address ?a }. OPTIONAL { ?bnode iiep:display ?d }.}",
+ )
+
+ return record