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import sys
from typing import Any, Dict, Iterator, List, Optional
from xsdata.codegen.models import Attr, AttrType, Class, Extension, Restrictions
from xsdata.models.dtd import (
Dtd,
DtdAttribute,
DtdAttributeDefault,
DtdAttributeType,
DtdContent,
DtdContentOccur,
DtdContentType,
DtdElement,
DtdElementType,
)
from xsdata.models.enums import DataType, Tag
from xsdata.utils.constants import DEFAULT_ATTR_NAME
class DtdMapper:
@classmethod
def map(cls, dtd: Dtd) -> Iterator[Class]:
for element in dtd.elements:
yield cls.build_class(element, dtd.location)
@classmethod
def build_class(cls, element: DtdElement, location: str) -> Class:
target = Class(
qname=element.qname,
ns_map=element.ns_map,
tag=Tag.ELEMENT,
location=location,
)
cls.build_attributes(target, element)
cls.build_elements(target, element)
return target
@classmethod
def build_attributes(cls, target: Class, element: DtdElement):
for attribute in element.attributes:
cls.build_attribute(target, attribute)
@classmethod
def build_attribute(cls, target: Class, attribute: DtdAttribute):
attr_type = cls.build_attribute_type(target, attribute)
attr = Attr(
name=attribute.name,
namespace=target.ns_map.get(attribute.prefix),
tag=Tag.ATTRIBUTE,
types=[attr_type],
)
cls.build_attribute_restrictions(
attr, attribute.default, attribute.default_value
)
attr.index = len(target.attrs)
target.attrs.append(attr)
@classmethod
def build_attribute_restrictions(
cls, attr: Attr, default: DtdAttributeDefault, default_value: Optional[str]
):
attr.restrictions.max_occurs = 1
if default == DtdAttributeDefault.REQUIRED:
attr.restrictions.min_occurs = 1
elif default == DtdAttributeDefault.IMPLIED:
attr.restrictions.min_occurs = 0
elif default == DtdAttributeDefault.FIXED:
attr.fixed = True
attr.restrictions.min_occurs = 1
attr.default = default_value
elif default_value is not None:
attr.restrictions.min_occurs = 1
attr.default = default_value
else:
attr.restrictions.min_occurs = 0
@classmethod
def build_attribute_type(cls, target: Class, attribute: DtdAttribute) -> AttrType:
if attribute.type == DtdAttributeType.ENUMERATION:
cls.build_enumeration(target, attribute.name, attribute.values)
return AttrType(qname=attribute.name, forward=True)
return AttrType(qname=str(attribute.data_type), native=True)
@classmethod
def build_elements(cls, target: Class, element: DtdElement):
# "undefined", "empty", "any", "mixed", or "element";
if element.type == DtdElementType.ELEMENT and element.content:
cls.build_content(target, element.content)
elif element.type == DtdElementType.MIXED and element.content:
cls.build_mixed_content(target, element.content)
elif element.type == DtdElementType.ANY:
cls.build_extension(target, DataType.ANY_TYPE)
@classmethod
def build_mixed_content(cls, target: Class, content: DtdContent):
if content.left and content.left.type == DtdContentType.PCDATA:
target.mixed = True
content.left = None
elif content.right and content.right.type == DtdContentType.PCDATA:
target.mixed = True
content.right = None
target.tag = Tag.COMPLEX_TYPE
cls.build_content(target, content)
@classmethod
def build_extension(cls, target: Class, data_type: DataType):
ext_type = AttrType(qname=str(data_type), native=True)
extension = Extension(
tag=Tag.EXTENSION, type=ext_type, restrictions=Restrictions()
)
target.extensions.append(extension)
@classmethod
def build_content(cls, target: Class, content: DtdContent, **kwargs: Any):
content_type = content.type
if content_type == DtdContentType.ELEMENT:
restrictions = cls.build_restrictions(content.occur, **kwargs)
cls.build_element(target, content.name, restrictions)
elif content_type == DtdContentType.SEQ:
cls.build_content_tree(target, content, **kwargs)
elif content_type == DtdContentType.OR:
params = cls.build_occurs(content.occur)
params.update(
{
"choice": id(content),
"min_occurs": 0,
}
)
params.update(**kwargs)
cls.build_content_tree(target, content, **params)
else: # content_type == DtdContentType.PCDATA:
restrictions = cls.build_restrictions(content.occur, **kwargs)
cls.build_value(target, restrictions)
@classmethod
def build_content_tree(cls, target: Class, content: DtdContent, **kwargs: Any):
if content.left:
cls.build_content(target, content.left, **kwargs)
if content.right:
cls.build_content(target, content.right, **kwargs)
@classmethod
def build_occurs(cls, occur: DtdContentOccur) -> Dict:
if occur == DtdContentOccur.ONCE:
min_occurs = 1
max_occurs = 1
elif occur == DtdContentOccur.OPT:
min_occurs = 0
max_occurs = 1
elif occur == DtdContentOccur.MULT:
min_occurs = 0
max_occurs = sys.maxsize
else: # occur == DtdContentOccur.PLUS:
min_occurs = 1
max_occurs = sys.maxsize
return {
"min_occurs": min_occurs,
"max_occurs": max_occurs,
}
@classmethod
def build_restrictions(cls, occur: DtdContentOccur, **kwargs: Any) -> Restrictions:
params = cls.build_occurs(occur)
params.update(kwargs)
return Restrictions(**params)
@classmethod
def build_element(cls, target: Class, name: str, restrictions: Restrictions):
types = AttrType(qname=name, native=False)
attr = Attr(
name=name, tag=Tag.ELEMENT, types=[types], restrictions=restrictions.clone()
)
attr.index = len(target.attrs)
target.attrs.append(attr)
@classmethod
def build_value(cls, target: Class, restrictions: Restrictions):
types = AttrType(qname=str(DataType.STRING), native=True)
attr = Attr(
name=DEFAULT_ATTR_NAME,
tag=Tag.EXTENSION,
types=[types],
restrictions=restrictions.clone(),
)
attr.index = len(target.attrs)
target.attrs.append(attr)
@classmethod
def build_enumeration(cls, target: Class, name: str, values: List[str]):
inner = Class(qname=name, tag=Tag.SIMPLE_TYPE, location=target.location)
attr_type = AttrType(qname=str(DataType.STRING), native=True)
for value in values:
inner.attrs.append(
Attr(
fixed=True,
default=value,
name=value,
tag=Tag.ENUMERATION,
types=[attr_type.clone()],
)
)
target.inner.append(inner)
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