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from xsdata.codegen.mixins import RelativeHandlerInterface
from xsdata.codegen.models import Attr, Class
from xsdata.codegen.utils import ClassUtils
from xsdata.exceptions import AnalyzerValueError
class FlattenAttributeGroups(RelativeHandlerInterface):
"""Replace groups and attGroups with the source class attributes."""
__slots__ = ()
def process(self, target: Class):
"""
Iterate over all group attributes and apply handler logic.
Group attributes can refer to attributes or other group
attributes, repeat until there is no group attribute left.
"""
repeat = False
for attr in list(target.attrs):
if attr.is_group:
repeat = True
self.process_attribute(target, attr)
if repeat:
self.process(target)
def process_attribute(self, target: Class, attr: Attr):
"""
Find the source class the attribute refers to and copy its attributes
to the target class.
:raises AnalyzerValueError: if source class is not found.
"""
qname = attr.types[0].qname # group attributes have one type only.
source = self.container.find(qname, condition=lambda x: x.tag == attr.tag)
if not source:
raise AnalyzerValueError(f"Group attribute not found: `{qname}`")
if source is target:
ClassUtils.remove_attribute(target, attr)
else:
ClassUtils.copy_group_attributes(source, target, attr)
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