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import collections
import shutil
import json
import ruamel.yaml as yaml
try:
from ruamel.yaml import CSafeLoader as SafeLoader
except ImportError:
from ruamel.yaml import SafeLoader # type: ignore
import os
import subprocess
import copy
import pprint
import re
import sys
import rdflib
from rdflib import Graph, URIRef
import rdflib.namespace
from rdflib.namespace import RDF, RDFS
import urlparse
import logging
from .aslist import aslist
from typing import Any, cast, Dict, Iterable, Tuple, Union
from .ref_resolver import Loader, ContextType
_logger = logging.getLogger("salad")
def pred(datatype, # type: Dict[str, Union[Dict, str]]
field, # type: Dict
name, # type: str
context, # type: ContextType
defaultBase, # type: str
namespaces # type: Dict[str, rdflib.namespace.Namespace]
):
# type: (...) -> Union[Dict, str]
split = urlparse.urlsplit(name)
vee = None # type: Union[str, unicode]
if split.scheme:
vee = name
(ns, ln) = rdflib.namespace.split_uri(unicode(vee))
name = ln
if ns[0:-1] in namespaces:
vee = unicode(namespaces[ns[0:-1]][ln])
_logger.debug("name, v %s %s", name, vee)
v = None # type: Any
if field and "jsonldPredicate" in field:
if isinstance(field["jsonldPredicate"], dict):
v = {}
for k, val in field["jsonldPredicate"].items():
v[("@" + k[1:] if k.startswith("_") else k)] = val
if "@id" not in v:
v["@id"] = vee
else:
v = field["jsonldPredicate"]
elif "jsonldPredicate" in datatype:
if isinstance(datatype["jsonldPredicate"], collections.Iterable):
for d in datatype["jsonldPredicate"]:
if isinstance(d, dict):
if d["symbol"] == name:
v = d["predicate"]
else:
raise Exception(
"entries in the jsonldPredicate List must be "
"Dictionaries")
else:
raise Exception("jsonldPredicate must be a List of Dictionaries.")
# if not v:
# if field and "jsonldPrefix" in field:
# defaultBase = field["jsonldPrefix"]
# elif "jsonldPrefix" in datatype:
# defaultBase = datatype["jsonldPrefix"]
ret = v or vee
if not ret:
ret = defaultBase + name
if name in context:
if context[name] != ret:
raise Exception("Predicate collision on %s, '%s' != '%s'" %
(name, context[name], ret))
else:
_logger.debug("Adding to context '%s' %s (%s)", name, ret, type(ret))
context[name] = ret
return ret
def process_type(t, # type: Dict[str, Any]
g, # type: Graph
context, # type: ContextType
defaultBase, # type: str
namespaces, # type: Dict[str, rdflib.namespace.Namespace]
defaultPrefix # type: str
):
# type: (...) -> None
if t["type"] == "record":
recordname = t["name"]
_logger.debug("Processing record %s\n", t)
classnode = URIRef(recordname)
g.add((classnode, RDF.type, RDFS.Class))
split = urlparse.urlsplit(recordname)
if "jsonldPrefix" in t:
predicate = "%s:%s" % (t["jsonldPrefix"], recordname)
elif split.scheme:
(ns, ln) = rdflib.namespace.split_uri(unicode(recordname))
predicate = recordname
recordname = ln
else:
predicate = "%s:%s" % (defaultPrefix, recordname)
if context.get(recordname, predicate) != predicate:
raise Exception("Predicate collision on '%s', '%s' != '%s'" % (
recordname, context[recordname], predicate))
if not recordname:
raise Exception()
_logger.debug("Adding to context '%s' %s (%s)",
recordname, predicate, type(predicate))
context[recordname] = predicate
for i in t.get("fields", []):
fieldname = i["name"]
_logger.debug("Processing field %s", i)
v = pred(t, i, fieldname, context, defaultPrefix, namespaces)
if isinstance(v, basestring):
v = v if v[0] != "@" else None
else:
v = v["_@id"] if v.get("_@id", "@")[0] != "@" else None
if v:
(ns, ln) = rdflib.namespace.split_uri(unicode(v))
if ns[0:-1] in namespaces:
propnode = namespaces[ns[0:-1]][ln]
else:
propnode = URIRef(v)
g.add((propnode, RDF.type, RDF.Property))
g.add((propnode, RDFS.domain, classnode))
# TODO generate range from datatype.
if isinstance(i["type"], dict) and "name" in i["type"]:
process_type(i["type"], g, context, defaultBase,
namespaces, defaultPrefix)
if "extends" in t:
for e in aslist(t["extends"]):
g.add((classnode, RDFS.subClassOf, URIRef(e)))
elif t["type"] == "enum":
_logger.debug("Processing enum %s", t["name"])
for i in t["symbols"]:
pred(t, None, i, context, defaultBase, namespaces)
def salad_to_jsonld_context(j, schema_ctx):
# type: (Iterable, Dict[str, Any]) -> Tuple[ContextType, Graph]
context = {} # type: ContextType
namespaces = {}
g = Graph()
defaultPrefix = ""
for k, v in schema_ctx.items():
context[k] = v
namespaces[k] = rdflib.namespace.Namespace(v)
if "@base" in context:
defaultBase = cast(str, context["@base"])
del context["@base"]
else:
defaultBase = ""
for k, v in namespaces.items():
g.bind(k, v)
for t in j:
process_type(t, g, context, defaultBase, namespaces, defaultPrefix)
return (context, g)
def fix_jsonld_ids(obj, # type: Union[Dict[unicode, Any], List[Dict[unicode, Any]]]
ids # type: List[unicode]
):
# type: (...) -> None
if isinstance(obj, dict):
for i in ids:
if i in obj:
obj["@id"] = obj[i]
for v in obj.values():
fix_jsonld_ids(v, ids)
if isinstance(obj, list):
for entry in obj:
fix_jsonld_ids(entry, ids)
def makerdf(workflow, # type: Union[str, unicode]
wf, # type: Union[List[Dict[unicode, Any]], Dict[unicode, Any]]
ctx, # type: ContextType
graph=None # type: Graph
):
# type: (...) -> Graph
prefixes = {}
idfields = []
for k, v in ctx.iteritems():
if isinstance(v, dict):
url = v["@id"]
else:
url = v
if url == "@id":
idfields.append(k)
doc_url, frg = urlparse.urldefrag(url)
if "/" in frg:
p = frg.split("/")[0]
prefixes[p] = u"%s#%s/" % (doc_url, p)
fix_jsonld_ids(wf, idfields)
if graph is None:
g = Graph()
else:
g = graph
if isinstance(wf, list):
for w in wf:
w["@context"] = ctx
g.parse(data=json.dumps(w), format='json-ld', location=workflow)
else:
wf["@context"] = ctx
g.parse(data=json.dumps(wf), format='json-ld', location=workflow)
# Bug in json-ld loader causes @id fields to be added to the graph
for sub, pred, obj in g.triples((None, URIRef("@id"), None)):
g.remove((sub, pred, obj))
for k2, v2 in prefixes.iteritems():
g.namespace_manager.bind(k2, v2)
return g
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