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from asdf.extension import Converter
class ReferenceConverter(Converter):
tags = []
types = ["asdf.reference.Reference"]
def to_yaml_tree(self, obj, tag, ctx):
from asdf.generic_io import relative_uri
base_uri = None
if ctx._blocks._write_fd is not None and ctx._blocks._write_fd.uri is not None:
base_uri = ctx._blocks._write_fd.uri
elif ctx.url is not None:
base_uri = ctx.url
uri = relative_uri(base_uri, obj._uri) if base_uri is not None else obj._uri
return {"$ref": uri}
def from_yaml_tree(self, node, tag, ctx):
raise NotImplementedError()
def select_tag(self, obj, tags, ctx):
return None
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