+++ /dev/null
-# -*- coding: utf-8 -*-
-from xml.parsers.expat import ExpatError
-
-# Import ElementTree from anywhere
-try:
- import xml.etree.ElementTree as ET # Python >= 2.5
-except ImportError:
- try:
- import elementtree.ElementTree as ET # effbot's pure Python module
- except ImportError:
- import lxml.etree as ET # ElementTree API using libxml2
-
-import converters
-
-
-
-__all__ = ('parse', 'ParseError')
-
-
-
-class ParseError(Exception):
- def __init__(self, message):
- super(self, Exception).__init__(message)
-
-
-
-class XMLNamespace(object):
- '''Represents XML namespace.'''
-
- def __init__(self, uri):
- self.uri = uri
-
- def __call__(self, tag):
- return '{%s}%s' % (self.uri, tag)
-
- def __contains__(self, tag):
- return tag.startswith(str(self))
-
- def __repr__(self):
- return 'NS(%r)' % self.uri
-
- def __str__(self):
- return '%s' % self.uri
-
-
-
-class BookInfo(object):
- RDF = XMLNamespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#')
- DC = XMLNamespace('http://purl.org/dc/elements/1.1/')
-
- mapping = {
- DC('creator') : ('author', converters.str_to_person),
- DC('title') : ('title', converters.str_to_unicode),
- DC('subject.period') : ('epoch', converters.str_to_unicode),
- DC('subject.type') : ('kind', converters.str_to_unicode),
- DC('subject.genre') : ('genre', converters.str_to_unicode),
- DC('date') : ('created_at', converters.str_to_date),
- DC('date.pd') : ('released_to_public_domain_at', converters.str_to_date),
- DC('contributor.translator') : ('translator', converters.str_to_person),
- DC('contributor.technical_editor') : ('technical_editor', converters.str_to_person),
- DC('publisher') : ('publisher', converters.str_to_unicode),
- DC('source') : ('source_name', converters.str_to_unicode),
- DC('source.URL') : ('source_url', converters.str_to_unicode),
- }
-
-
- @classmethod
- def from_string(cls, xml):
- """docstring for from_string"""
- from StringIO import StringIO
- return cls.from_file(StringIO(xml))
-
-
- @classmethod
- def from_file(cls, xml_file):
- book_info = cls()
-
- try:
- tree = ET.parse(xml_file)
- except ExpatError, e:
- raise ParseError(e)
-
- description = tree.find('//' + book_info.RDF('Description'))
- if description is None:
- raise ParseError('no Description tag found in document')
-
- for element in description.findall('*'):
- book_info.parse_element(element)
-
- return book_info
-
-
- def parse_element(self, element):
- try:
- attribute, converter = self.mapping[element.tag]
- setattr(self, attribute, converter(element.text))
- except KeyError:
- pass
-
-
- def to_xml(self):
- """XML representation of this object."""
- ET._namespace_map[str(self.RDF)] = 'rdf'
- ET._namespace_map[str(self.DC)] = 'dc'
-
- root = ET.Element(self.RDF('RDF'))
- description = ET.SubElement(root, self.RDF('Description'))
-
- for tag, (attribute, converter) in self.mapping.iteritems():
- if hasattr(self, attribute):
- e = ET.Element(tag)
- e.text = unicode(getattr(self, attribute))
- description.append(e)
-
- return unicode(ET.tostring(root, 'utf-8'), 'utf-8')
-
-
-def parse(file_name):
- return BookInfo.from_file(file_name)
-
-