Source code for xsdata.codegen.validator

from dataclasses import dataclass
from typing import List
from typing import Optional

from xsdata.codegen.container import ClassContainer
from xsdata.codegen.models import Attr
from xsdata.codegen.models import Class
from xsdata.codegen.models import Extension
from xsdata.codegen.utils import ClassUtils
from xsdata.models.enums import Tag
from xsdata.utils import text
from xsdata.utils.collections import group_by

[docs]@dataclass class ClassValidator: """Run validations against the class container in order to remove or merge invalid or redefined types.""" container: ClassContainer
[docs] @classmethod def process(cls, container: ClassContainer): """Static entry point for container validation.""" cls(container).validate()
[docs] def validate(self): """ Remove if possible classes with the same qualified name. Steps: 1. Remove classes with missing extension type. 2. Handle duplicate types. 3. Mark strict types. """ for classes in self.container.values(): if len(classes) > 1: self.remove_invalid_classes(classes) if len(classes) > 1: self.handle_duplicate_types(classes) if len(classes) > 1: self.mark_strict_types(classes)
[docs] def remove_invalid_classes(self, classes: List[Class]): """Remove from the given class list any class with missing extension type.""" def is_invalid(source: Class, ext: Extension) -> bool: """Check if given type declaration is not native and is missing.""" if ext.type.native: return False qname = source.source_qname( return qname not in self.container for target in list(classes): if any(is_invalid(target, extension) for extension in target.extensions): classes.remove(target)
[docs] @classmethod def handle_duplicate_types(cls, classes: List[Class]): """Handle classes with same namespace, name that are derived from the same xs type.""" grouped = group_by(classes, lambda x: f"{x.type.__name__}{x.source_qname()}") for items in grouped.values(): if len(items) == 1: continue index = cls.select_winner(list(items)) winner = items.pop(index) for item in items: classes.remove(item) if winner.container == Tag.REDEFINE: cls.merge_redefined_type(item, winner)
[docs] @classmethod def merge_redefined_type(cls, source: Class, target: Class): """ Copy any attributes and extensions to redefined types from the original definitions. Redefined inheritance is optional search for self references in extensions and attribute groups. """ circular_extension = cls.find_circular_extension(target) circular_group = cls.find_circular_group(target) if circular_extension: ClassUtils.copy_attributes(source, target, circular_extension) ClassUtils.copy_extensions(source, target, circular_extension) if circular_group: ClassUtils.copy_group_attributes(source, target, circular_group)
[docs] @classmethod def select_winner(cls, candidates: List[Class]) -> int: """ Returns the index of the class that will survive the duplicate process. Classes that were extracted from in xs:override/xs:redefined containers have priority, otherwise pick the last in the list. """ return next( ( index for index, item in enumerate(candidates) if item.container in (Tag.OVERRIDE, Tag.REDEFINE) ), -1, )
[docs] @classmethod def find_circular_extension(cls, target: Class) -> Optional[Extension]: """Search for any target class extensions that is a circular reference.""" for ext in target.extensions: if text.suffix( == return ext return None
[docs] @classmethod def find_circular_group(cls, target: Class) -> Optional[Attr]: """Search for any target class attributes that is a circular reference.""" for attr in target.attrs: if text.suffix( == return attr return None
[docs] @classmethod def mark_strict_types(cls, classes: List[Class]): """If there is a class derived from xs:element update all xs:complexTypes derived classes as strict types.""" element = next((obj for obj in classes if obj.is_element), None) if element: for obj in classes: if obj is not element and obj.is_complex: obj.strict_type = True