def resolve_ptr(
near_endpoint: s_obj.Object,
pointer_name: str,
*,
upcoming_intersections: Sequence[s_types.Type] = (),
far_endpoints: Iterable[s_obj.Object] = (),
direction: s_pointers.PointerDirection = (
s_pointers.PointerDirection.Outbound),
source_context: Optional[parsing.ParserContext] = None,
track_ref: Optional[Union[qlast.Base, Literal[False]]],
ctx: context.ContextLevel,
) -> s_pointers.Pointer:
if not isinstance(near_endpoint, s_sources.Source):
# Reference to a property on non-object
msg = 'invalid property reference on a primitive type expression'
raise errors.InvalidReferenceError(msg, context=source_context)
ptr: Optional[s_pointers.Pointer] = None
if direction is s_pointers.PointerDirection.Outbound:
ptr = near_endpoint.maybe_get_ptr(
ctx.env.schema,
s_name.UnqualName(pointer_name),
)
if ptr is not None:
ref = ptr.get_nearest_non_derived_parent(ctx.env.schema)
if track_ref is not False:
ctx.env.add_schema_ref(ref, track_ref)
else:
ptrs = near_endpoint.getrptrs(ctx.env.schema,
pointer_name,
sources=far_endpoints)
if ptrs:
if track_ref is not False:
# If this reverse pointer access is followed by
# intersections, we filter out any pointers that
# couldn't be picked up by the intersections. This avoids
# creating spurious dependencies when reverse
# links are used in schemas.
dep_ptrs = {
ptr
for ptr in ptrs
if (src := ptr.get_source(ctx.env.schema)) and all(
src.issubclass(ctx.env.schema, typ) or any(
dsrc.issubclass(ctx.env.schema, typ)
for dsrc in src.descendants(ctx.env.schema))
for typ in upcoming_intersections)
}
for p in dep_ptrs:
ctx.env.add_schema_ref(
p.get_nearest_non_derived_parent(ctx.env.schema),
track_ref)
opaque = not far_endpoints
ctx.env.schema, ptr = s_pointers.get_or_create_union_pointer(
ctx.env.schema,
ptrname=s_name.UnqualName(pointer_name),
source=near_endpoint,
direction=direction,
components=ptrs,
opaque=opaque,
modname=ctx.derived_target_module,
)
if ptr is not None:
return ptr
if isinstance(near_endpoint, s_links.Link):
vname = near_endpoint.get_verbosename(ctx.env.schema, with_parent=True)
msg = f'{vname} has no property {pointer_name!r}'
elif direction == s_pointers.PointerDirection.Outbound:
msg = (f'{near_endpoint.get_verbosename(ctx.env.schema)} '
f'has no link or property {pointer_name!r}')
else:
nep_name = near_endpoint.get_displayname(ctx.env.schema)
path = f'{nep_name}.{direction}{pointer_name}'
msg = f'{path!r} does not resolve to any known path'
err = errors.InvalidReferenceError(msg, context=source_context)
if direction is s_pointers.PointerDirection.Outbound:
near_enpoint_pointers = near_endpoint.get_pointers(ctx.env.schema)
s_utils.enrich_schema_lookup_error(
err,
s_name.UnqualName(pointer_name),
modaliases=ctx.modaliases,
item_type=s_pointers.Pointer,
collection=near_enpoint_pointers.objects(ctx.env.schema),
schema=ctx.env.schema,
)
raise err
def resolve_ptr(
near_endpoint: s_obj.Object,
pointer_name: str,
*,
far_endpoints: Iterable[s_obj.Object] = (),
direction: s_pointers.PointerDirection = (
s_pointers.PointerDirection.Outbound
),
source_context: Optional[parsing.ParserContext] = None,
track_ref: Optional[Union[qlast.Base, Literal[False]]],
ctx: context.ContextLevel,
) -> s_pointers.Pointer:
if not isinstance(near_endpoint, s_sources.Source):
# Reference to a property on non-object
msg = 'invalid property reference on a primitive type expression'
raise errors.InvalidReferenceError(msg, context=source_context)
ptr: Optional[s_pointers.Pointer] = None
if direction is s_pointers.PointerDirection.Outbound:
ptr = near_endpoint.maybe_get_ptr(
ctx.env.schema,
s_name.UnqualName(pointer_name),
)
if ptr is not None:
ref = ptr.get_nearest_non_derived_parent(ctx.env.schema)
if track_ref is not False:
ctx.env.add_schema_ref(ref, track_ref)
else:
ptrs = near_endpoint.getrptrs(ctx.env.schema, pointer_name,
sources=far_endpoints)
if ptrs:
if track_ref is not False:
for p in ptrs:
ctx.env.add_schema_ref(
p.get_nearest_non_derived_parent(ctx.env.schema),
track_ref)
opaque = not far_endpoints
ctx.env.schema, ptr = s_pointers.get_or_create_union_pointer(
ctx.env.schema,
ptrname=s_name.UnqualName(pointer_name),
source=near_endpoint,
direction=direction,
components=ptrs,
opaque=opaque,
modname=ctx.derived_target_module,
)
if ptr is not None:
return ptr
if isinstance(near_endpoint, s_links.Link):
vname = near_endpoint.get_verbosename(ctx.env.schema, with_parent=True)
msg = f'{vname} has no property {pointer_name!r}'
elif direction == s_pointers.PointerDirection.Outbound:
msg = (f'{near_endpoint.get_verbosename(ctx.env.schema)} '
f'has no link or property {pointer_name!r}')
else:
nep_name = near_endpoint.get_displayname(ctx.env.schema)
path = f'{nep_name}.{direction}{pointer_name}'
msg = f'{path!r} does not resolve to any known path'
err = errors.InvalidReferenceError(msg, context=source_context)
if direction is s_pointers.PointerDirection.Outbound:
near_enpoint_pointers = near_endpoint.get_pointers(ctx.env.schema)
s_utils.enrich_schema_lookup_error(
err,
s_name.UnqualName(pointer_name),
modaliases=ctx.modaliases,
item_type=s_pointers.Pointer,
collection=near_enpoint_pointers.objects(ctx.env.schema),
schema=ctx.env.schema,
)
raise err
