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Source code for galaxy.datatypes.triples

"""
Triple format classes
"""
import logging
import re
from typing import TYPE_CHECKING

from galaxy.datatypes.sniff import (
    build_sniff_from_prefix,
    FilePrefix,
)
from . import (
    binary,
    data,
    text,
    xml,
)

if TYPE_CHECKING:
    from galaxy.model import DatasetInstance

log = logging.getLogger(__name__)

TURTLE_PREFIX_PATTERN = re.compile(r"@prefix\s+[^:]*:\s+<[^>]*>\s\.")
TURTLE_BASE_PATTERN = re.compile(r"@base\s+<[^>]*>\s\.")


[docs]class Triples(data.Data): """ The abstract base class for the file format that can contain triples """ edam_data = "data_0582" edam_format = "format_2376" file_ext = "triples"
[docs] def sniff(self, filename: str) -> bool: """ Returns false and the user must manually set. """ return False
[docs] def set_peek(self, dataset: "DatasetInstance", **kwd) -> None: """Set the peek and blurb text""" if not dataset.dataset.purged: dataset.peek = data.get_file_peek(dataset.file_name) dataset.blurb = "Triple data" else: dataset.peek = "file does not exist" dataset.blurb = "file purged from disk"
[docs]@build_sniff_from_prefix class NTriples(data.Text, Triples): """ The N-Triples triple data format """ edam_format = "format_3256" file_ext = "nt"
[docs] def sniff_prefix(self, file_prefix: FilePrefix) -> bool: # <http://example.org/dir/relfile> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/type> . if re.compile(r"<[^>]*>\s<[^>]*>\s<[^>]*>\s\.").search(file_prefix.contents_header): return True return False
[docs] def set_peek(self, dataset: "DatasetInstance", **kwd) -> None: """Set the peek and blurb text""" if not dataset.dataset.purged: dataset.peek = data.get_file_peek(dataset.file_name) dataset.blurb = "N-Triples triple data" else: dataset.peek = "file does not exist" dataset.blurb = "file purged from disk"
[docs]class N3(data.Text, Triples): """ The N3 triple data format """ edam_format = "format_3257" file_ext = "n3"
[docs] def sniff(self, filename: str) -> bool: """ Returns false and the user must manually set. """ return False
[docs] def set_peek(self, dataset: "DatasetInstance", **kwd) -> None: """Set the peek and blurb text""" if not dataset.dataset.purged: dataset.peek = data.get_file_peek(dataset.file_name) dataset.blurb = "Notation-3 Triple data" else: dataset.peek = "file does not exist" dataset.blurb = "file purged from disk"
[docs]@build_sniff_from_prefix class Turtle(data.Text, Triples): """ The Turtle triple data format """ edam_format = "format_3255" file_ext = "ttl"
[docs] def sniff_prefix(self, file_prefix: FilePrefix) -> bool: # @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . if file_prefix.search(TURTLE_PREFIX_PATTERN): return True if file_prefix.search(TURTLE_BASE_PATTERN): return True return False
[docs] def set_peek(self, dataset: "DatasetInstance", **kwd) -> None: """Set the peek and blurb text""" if not dataset.dataset.purged: dataset.peek = data.get_file_peek(dataset.file_name) dataset.blurb = "Turtle triple data" else: dataset.peek = "file does not exist" dataset.blurb = "file purged from disk"
# TODO: we might want to look at rdflib or a similar, larger lib/egg
[docs]@build_sniff_from_prefix class Rdf(xml.GenericXml, Triples): """ Resource Description Framework format (http://www.w3.org/RDF/). """ edam_format = "format_3261" file_ext = "rdf"
[docs] def sniff_prefix(self, file_prefix: FilePrefix) -> bool: # <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" ... match = re.compile(r'xmlns:([^=]*)="http://www.w3.org/1999/02/22-rdf-syntax-ns#"').search( file_prefix.contents_header ) if match and (f"{match.group(1)}:RDF") in file_prefix.contents_header: return True return False
[docs] def set_peek(self, dataset: "DatasetInstance", **kwd) -> None: """Set the peek and blurb text""" if not dataset.dataset.purged: dataset.peek = data.get_file_peek(dataset.file_name) dataset.blurb = "RDF/XML triple data" else: dataset.peek = "file does not exist" dataset.blurb = "file purged from disk"
[docs]@build_sniff_from_prefix class Jsonld(text.Json, Triples): """ The JSON-LD data format """ # format not defined in edam so we use the json format number edam_format = "format_3464" file_ext = "jsonld"
[docs] def sniff_prefix(self, file_prefix: FilePrefix) -> bool: if self._looks_like_json(file_prefix): if '"@id"' in file_prefix.contents_header or '"@context"' in file_prefix.contents_header: return True return False
[docs] def set_peek(self, dataset: "DatasetInstance", **kwd) -> None: """Set the peek and blurb text""" if not dataset.dataset.purged: dataset.peek = data.get_file_peek(dataset.file_name) dataset.blurb = "JSON-LD triple data" else: dataset.peek = "file does not exist" dataset.blurb = "file purged from disk"
[docs]class HDT(binary.Binary, Triples): """ The HDT triple data format """ edam_format = "format_2376" file_ext = "hdt"
[docs] def sniff(self, filename: str) -> bool: with open(filename, "rb") as f: if f.read(4) == b"$HDT": return True return False
[docs] def set_peek(self, dataset: "DatasetInstance", **kwd) -> None: """Set the peek and blurb text""" if not dataset.dataset.purged: dataset.peek = data.get_file_peek(dataset.file_name) dataset.blurb = "HDT triple data" else: dataset.peek = "file does not exist" dataset.blurb = "file purged from disk"