116 lines
3.7 KiB
Python
116 lines
3.7 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (c), 2018-2019, SISSA (International School for Advanced Studies).
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# All rights reserved.
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# This file is distributed under the terms of the MIT License.
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# See the file 'LICENSE' in the root directory of the present
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# distribution, or http://opensource.org/licenses/MIT.
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#
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# @author Davide Brunato <brunato@sissa.it>
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#
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import re
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from .exceptions import ElementPathValueError
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_RE_MATCH_NAMESPACE = re.compile(r'{([^}]*)}')
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# Namespaces
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XML_NAMESPACE = "http://www.w3.org/XML/1998/namespace"
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XSD_NAMESPACE = "http://www.w3.org/2001/XMLSchema"
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XSI_NAMESPACE = "http://www.w3.org/2001/XMLSchema-instance"
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XLINK_NAMESPACE = "http://www.w3.org/1999/xlink"
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XPATH_FUNCTIONS_NAMESPACE = "http://www.w3.org/2005/xpath-functions"
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XQT_ERRORS_NAMESPACE = "http://www.w3.org/2005/xqt-errors"
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XPATH_1_DEFAULT_NAMESPACES = {'xml': XML_NAMESPACE}
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XPATH_2_DEFAULT_NAMESPACES = {
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'xml': XML_NAMESPACE,
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'xs': XSD_NAMESPACE,
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'xlink': XLINK_NAMESPACE,
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'fn': XPATH_FUNCTIONS_NAMESPACE,
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'err': XQT_ERRORS_NAMESPACE
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}
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# XML namespace attributes
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XML_BASE = '{%s}base' % XML_NAMESPACE
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XML_LANG = '{%s}lang' % XML_NAMESPACE
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XML_SPACE = '{%s}space' % XML_NAMESPACE
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XML_ID = '{%s}id' % XML_NAMESPACE
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# XML Schema Instance namespace attributes
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XSI_TYPE = '{%s}type' % XSI_NAMESPACE
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XSI_NIL = '{%s}nil' % XSI_NAMESPACE
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XSI_SCHEMA_LOCATION = '{%s}schemaLocation' % XSI_NAMESPACE
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XSI_NONS_SCHEMA_LOCATION = '{%s}schemaLocation' % XSI_NAMESPACE
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# XML Schema types
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XSD_NOTATION = '{%s}NOTATION' % XSD_NAMESPACE
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XSD_ANY_ATOMIC_TYPE = '{%s}anyAtomicType' % XSD_NAMESPACE
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XSD_ID = '{%s}ID' % XSD_NAMESPACE
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XSD_IDREF = '{%s}IDREF' % XSD_NAMESPACE
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XSD_IDREFS = '{%s}IDREFS' % XSD_NAMESPACE
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# XPath type labels defined in XSD namespace that are not XSD builtin types
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XSD_UNTYPED = '{%s}untyped' % XSD_NAMESPACE
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XSD_UNTYPED_ATOMIC = '{%s}untypedAtomic' % XSD_NAMESPACE
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def get_namespace(name):
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try:
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return _RE_MATCH_NAMESPACE.match(name).group(1)
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except (AttributeError, TypeError):
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return ''
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def qname_to_prefixed(name, namespaces):
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"""
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Get the prefixed form of a name, using a namespace map.
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:param name: A fully qualified name or a local name.
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:param namespaces: A dictionary with the map from prefixes to namespace URIs.
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:return: String with a prefixed or local name.
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"""
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qname_uri = get_namespace(name)
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for prefix, uri in sorted(namespaces.items(), reverse=True):
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if uri != qname_uri:
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continue
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if prefix:
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return name.replace(u'{%s}' % uri, u'%s:' % prefix)
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else:
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return name.replace(u'{%s}' % uri, '')
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return name
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def prefixed_to_qname(name, namespaces):
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"""
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Get the fully qualified form of a name, using a namespace map.
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:param name: A local name or a prefixed name or a fully qualified name.
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:param namespaces: A dictionary with the map from prefixes to namespace URIs.
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:return: String with a fully qualified or local name.
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"""
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if name and name[0] == '{':
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return name
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try:
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prefix, name = name.split(':')
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except ValueError:
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if ':' in name:
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raise ElementPathValueError("wrong format for reference name %r" % name)
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try:
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uri = namespaces['']
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except KeyError:
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return name
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else:
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return u'{%s}%s' % (uri, name) if uri else name
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else:
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if not prefix or not name:
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raise ElementPathValueError("wrong format for reference name %r" % name)
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try:
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uri = namespaces[prefix]
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except KeyError:
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raise ElementPathValueError("prefix %r not found in namespace map" % prefix)
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else:
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return u'{%s}%s' % (uri, name) if uri else name
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