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# vim: set fileencoding=UTF-8:
# Copyright 2013 Red Hat, Inc.
# Author: Jan Pokorný <jpokorny at redhat dot com>
# Licensed under LGPL v2.1 (the same as original ns-schema.xsl)
from sys import modules, stdout, stderr
from datetime import date
from textwrap import TextWrapper, dedent
from os import extsep, getcwd, mkdir, symlink, remove
from os.path import basename, dirname, exists, isdir, islink, join, splitext, \
sep as pathsep
from subprocess import call
from shlex import split
#import codecs
import logging
logging.basicConfig()
log = logging.getLogger(__name__)
#VERSIONSEP = sep # non-unix paths -> problems
VERSIONSEP = '/'
ONTSEP = '#'
INDEX = 'index.html'
TEMPLATE_GENSHI = join(dirname(__file__), 'ontogen.template')
TEMPLATE_XSLT = join(dirname(__file__), 'ns-schema.xsl')
TEXT_INDENT = ' '
TW = TextWrapper(initial_indent=TEXT_INDENT, subsequent_indent=TEXT_INDENT)
tw = lambda x: TW.fill(x)
twd = lambda x: tw(dedent(x))
norm = lambda x: reduce(
lambda a, b: a and a + (b.islower() and b or '-' + b.lower()) or b.lower(),
x,
''
).replace('_', '-')
#
# Helpers
#
# classics: http://stackoverflow.com/a/1383402
class ClassProperty(property):
def __get__(self, this, owner):
return self.fget.__get__(None, owner)()
# another common fixer (adjusted): http://stackoverflow.com/a/13937525
class InheritDocstring(type):
"""Allows docstrings to be inherited (restricted to external classes)"""
def __init__(this, name, bases, attrs):
if __name__ not in (this.__module__, this.__base__.__module__):
if not getattr(this, '__doc__', None):
this.__doc__ = super(this, this).__doc__
super(InheritDocstring, InheritDocstring).__init__(this, name,
bases, attrs)
def custom_symlink(source, link_name, report=False):
"""symlink + overwriting (unlink-new) of existing symlinks"""
if exists(link_name):
if islink(link_name):
remove(link_name)
else:
raise RuntimeError('{0} is in our way'.format(link_name))
if report is not False:
print '{0}: {1}'.format(report, link_name)
symlink(source, link_name)
#
# Pure documentation level
#
class Example(object):
"""Important data regarding examples"""
@ClassProperty
@classmethod
def comment(this):
return tw('\n'.join(this.__doc__.strip().splitlines()[:1]))
@ClassProperty
@classmethod
def pfx(this):
return ''
@ClassProperty
@classmethod
def code(this):
return '\n'.join(map(str.rstrip, this.__doc__.strip().splitlines()[2:]))
@ClassProperty
@classmethod
def image(this):
return ''
# combine this "example" with Makefile to trigger the magic
class ExampleSelfFigureProto(type):
def __new__(self, ontology):
base = ontology.base
class ExampleSelfFigure(Example):
"""Illustrative figure of the vocabulary"""
image_full = ontology.version + VERSIONSEP + base + extsep + 'svg'
image = base + extsep + 'svg' # referenced from html
symlink = base + extsep + 'svg'
return ExampleSelfFigure
#
# Abstract RDF level
#
class RDFEntity(object):
"""Common base for property, class and ontology"""
__metaclass__ = InheritDocstring
@ClassProperty
@classmethod
def id(this):
return ONTSEP + norm(this.__name__)
@ClassProperty
@classmethod
def namespaces(this):
return {}
@ClassProperty
@classmethod
def documentation(this):
return this.__doc__
@ClassProperty
@classmethod
def label(this):
return '\n'.join(this.documentation.strip().splitlines()[:1]).strip()
@ClassProperty
@classmethod
def comment(this):
return '\n\n'.join(
map(
twd,
'\n'.join(map(
str.rstrip,
this.documentation.strip().splitlines()[2:])).split('\n\n')
)
)
@ClassProperty
@classmethod
def status(this):
return ''
#
# RDF entities
#
class Class(RDFEntity):
"""Important data regarding RDF class"""
# decorators
@classmethod
def inDomainOf(this, prop):
"""Tells that decorated Property has decorating Class as a domain"""
assert issubclass(prop, Property)
if not prop.domain:
prop.domain = this.id
else:
log.warning('{0} already has domain set'
.format(prop))
return prop
@classmethod
def inRangeOf(this, prop):
"""Tells that decorated Property has decorating Class as a range"""
assert issubclass(prop, Property)
if not prop.range:
prop.range = this.id
else:
log.warning('{0} already has range set'
.format(prop))
return prop
# members
@ClassProperty
@classmethod
def subClassOf(this):
return '' if this.__base__ == Class else this.__base__.id
class Property(RDFEntity):
"""Important data regarding RDF property"""
# members
@ClassProperty
@classmethod
def domain(this):
return ''
@ClassProperty
@classmethod
def range(this):
return ''
@ClassProperty
@classmethod
def subPropertyOf(this):
return '' if this.__base__ == Property else this.__base__.id
class Ontology(RDFEntity):
"""Important data regarding ontology"""
# decorators
@classmethod
def supersededBy(this, onto):
"""Tells that decorated Ontology supersedes the decorating Ontology"""
assert issubclass(onto, Ontology)
if onto.priorVersion is None:
onto.priorVersion = this
else:
log.warning('{0} already has priorVersion set'.format(onto))
return onto
# members - override
@ClassProperty
@classmethod
def documentation(this):
ret = getattr(this, '__doc__', '') or modules[this.__module__].__doc__
return ret
# members
@ClassProperty
@classmethod
def base_uri(this):
module = modules[this.__module__]
if hasattr(module, 'base_uri'):
return module.base_uri
raise NotImplementedError
@ClassProperty
@classmethod
def version(this):
# sorting key
raise NotImplementedError
@ClassProperty
@classmethod
def base_uri_full(this):
return this.base_uri + VERSIONSEP + this.version
@ClassProperty
@classmethod
def base(this):
# TODO: cache me please?
return this.base_uri.rpartition('/')[2]
@ClassProperty
@classmethod
def creator(this):
module = modules[this.__module__]
if hasattr(module, '__author__'):
return module.__author__
return ''
@ClassProperty
@classmethod
def issued(this):
return ''
@ClassProperty
@classmethod
def modified(this):
return date.today().isoformat()
@ClassProperty
@classmethod
def priorVersion(this):
return None
@ClassProperty
@classmethod
def classes(this):
return []
@ClassProperty
@classmethod
def properties(this):
return []
@ClassProperty
@classmethod
def examples(this):
return []
# extras
@classmethod
def valid(this):
proper_subclasses = all((
all(issubclass(c, Class) for c in this.classes),
all(issubclass(p, Property) for p in this.properties),
all(issubclass(e, Example) for e in this.examples),
))
if not proper_subclasses:
log.warning('Not proper subclasses used')
ids = [
x.id for x in
reduce(lambda a, b: a + b,
(getattr(this, ent_name) for ent_name in ('classes',
'properties')))
]
unique_ids = len(ids) == len(set(ids))
if not unique_ids:
log.warning('Not unique IDs used')
return proper_subclasses and unique_ids
@classmethod
def _prepare_targets(this):
base = this.base
version = this.version
if not exists(version):
mkdir(version)
elif not isdir(version):
raise RuntimeError('{0} is not a directory'.format(version))
return (version + VERSIONSEP + base + extsep + 'rdf',
base + extsep + 'rdf')
@classmethod
def gendoc(this, infile, outfile, template=TEMPLATE_XSLT):
"""Generate HTML as per RDF (ns-schema.xsl wrapper)"""
cmd = 'xsltproc --stringparam xmlfile {reference} -o {outfile}' \
' {template} {infile}'.format(
reference=basename(infile),
infile=infile,
outfile=outfile,
template=template
)
log.debug('running {0}'.format(split(cmd)))
if call(split(cmd)):
raise RuntimeError('Something went wrong while running {0}; pwd={1}'
.format(cmd, getcwd()))
@classmethod
def generate(this, ontologies=(), template=None, outfile='-', gendoc=True):
"""Generate RDF as per declarations"""
from genshi.template import MarkupTemplate
namespaces = {}
for ns, ns_uri in reduce(
lambda a, b: a + b.namespaces.items(),
[this] + this.classes + this.properties,
[]
):
if namespaces.setdefault('xmlns:' + ns, ns_uri) != ns_uri:
print >>stderr, 'NS clash: {0} vs {1}'.format(
namespaces['xmlns:' + ns], ns_uri)
tmpl_filename = template or TEMPLATE_GENSHI
tmpl_fileobj = open(tmpl_filename)
#tmpl_fileobj = codecs.open(tmpl_filename, encoding='UTF-8')
tmpl = MarkupTemplate(tmpl_fileobj, tmpl_filename)
tmpl_fileobj.close()
symfile = None
if outfile is '-':
outobj = stdout
else:
if outfile == 'AUTO':
outfile, symfile = this._prepare_targets()
outobj = open(outfile, "w")
tmpldict = dict(Ontology=this, namespaces=namespaces)
print >>outobj, \
tmpl.generate(**tmpldict).render('xml', strip_whitespace=False)
outobj.flush() # usually failing without this
# htmldoc
htmlfile = None
if gendoc and outfile != '-':
htmlfile = join(dirname(outfile), INDEX)
this.gendoc(outfile, htmlfile)
# symlink to base (non-versioned) only for the newest ontology
if ontologies[-1] is this and symfile:
custom_symlink(outfile, symfile, 'output')
if htmlfile:
custom_symlink(htmlfile, splitext(symfile)[0] + extsep + 'html',
'html')
for ex in [e for e in this.examples if e.image]:
img = ex.image
if ex.__name__ == 'ExampleSelfFigure':
custom_symlink(ex.image_full, ex.symlink, 'self-figure')
elif not pathsep in img:
custom_symlink(join(this.base, img), img, 'image')
if outobj is not stdout:
outobj.close()
@classmethod
def __str__(this):
this.generate()
class PrependFigure(InheritDocstring):
"""Attaches self-figure (to be provided externally) as a first example"""
def __new__(this, name, bases, attrs):
ret = super(PrependFigure, PrependFigure).__new__(this, name, bases,
attrs)
if attrs['__module__'] == __name__:
return ret # nothing more to do here for internal classes
try:
if all(map(lambda x: isinstance(x, basestring),
map(lambda x: getattr(ret, x, None),
('base_uri_full',))
)):
setattr(ret, 'examples', [ExampleSelfFigureProto(ret)]
+ list(getattr(ret, 'examples', ())))
except NotImplementedError:
pass
finally:
return ret
class OntologyWithFigure(Ontology):
__metaclass__ = PrependFigure
#
# Generalized view
#
class Ontologies(object):
"""Groups multiple versions of ontologies (presumably of the same base)"""
def __init__(self, ontologies=()):
self._ontologies = []
if ontologies:
self.include(*ontologies)
# decorators
def include(self, *ontologies):
assert all(map(lambda o: o.valid(), ontologies))
assert reduce(lambda a, b: issubclass(a, b) or issubclass(b, a),
ontologies)
map(lambda a: setattr(a, '_final', True), ontologies)
merge = self._ontologies + list(ontologies)
self._ontologies = list(sorted(set(merge), key=lambda o: o.version))
# make it decorator-compatible
return (lambda first=None, *others: first)(*ontologies)
# members
def generate_latest(self, **kwargs):
self._ontologies[-1].generate(tuple(self._ontologies), **kwargs)
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