rename_generator.py

from pyecore.resources import ResourceSet
import pyecore.ecore as ecore
import multigen
from pyecoregen.ecore import EcoreTask


class RenameTask(EcoreTask):
    template_name = 'update_name.py.tpl'
    element_type = ecore.EPackage

    @staticmethod
    def filename_for_element(package):
        return 'update_name.py'

    @staticmethod
    def all_structural_features(package):
        return (f for f in package.eAllContents()
                if isinstance(f, ecore.EStructuralFeature))

    def create_template_context(self, element, **kwargs):
        return super().create_template_context(
            element=element,
            all_features=self.all_structural_features(element)
        )

    def create_environment(self, element, **kwargs):
        environment = super().create_environment(
            element=element,
            all_features=self.all_structural_features(element)
        )
        environment.filters['extended_name'] = self.filter_extended_name
        return environment


class UpdateNameGenerator(multigen.jinja.JinjaGenerator):
    templates_path = '.'

    @staticmethod
    def filter_extended_name(value: ecore.ENamedElement) -> str:
        annotation = value.getEAnnotation('http:///org/eclipse/emf/ecore/util/ExtendedMetaData')
        new_name = annotation.details.get('name', '') if annotation else None
        return new_name

    def __init__(self, **kwargs):
        self.tasks = [RenameTask()]
        super().__init__(**kwargs)

    def create_environment(self, **kwargs):
        environment = super().create_environment(**kwargs)
        environment.filters['extended_name'] = self.filter_extended_name
        return environment


# Load your .ecore and launch the code generation
rset = ResourceSet()
root = rset.get_resource('A.ecore').contents[0]
generator = UpdateNameGenerator()
generator.generate(root, '.')

update_name.py.tpl

from .{{ element.name }} import *

{% for feature in all_features -%}
{%- if feature | extended_name -%}
{{ feature.eContainingClass.name }}.{{ feature.name }}.name = '{{ feature | extended_name }}'
setattr({{ feature.eContainingClass.name }}, '{{ feature | extended_name }}', {{ feature.eContainingClass.name }}.{{ feature.name }})
{% endif %}
{%- endfor %}