def _construct_resolved_attributes(self, res_opt: 'ResolveOptions', under: Optional['CdmAttributeContext']) -> 'ResolvedAttributeSetBuilder':
# find and cache the complete set of attributes
# attributes definitions originate from and then get modified by subsequent re-defintions from (in this order):
# the datatype used as an attribute, traits applied to that datatype,
# the purpose of the attribute, any traits applied to the attribute.
from cdm.resolvedmodel import AttributeResolutionContext, ResolvedAttribute, ResolvedAttributeSetBuilder
from .cdm_attribute_resolution_guidance_def import CdmAttributeResolutionGuidanceDefinition
rasb = ResolvedAttributeSetBuilder()
rasb.ras.attribute_context = under
# add this attribute to the set
# make a new one and apply any traits
new_att = ResolvedAttribute(res_opt, self, self.name, under)
rasb.own_one(new_att)
rts = self._fetch_resolved_traits(res_opt)
# this context object holds all of the info about what needs to happen to resolve these attributes.
# make a copy and add defaults if missing
res_guide_with_default = None
if self.resolution_guidance is not None:
res_guide_with_default = self.resolution_guidance.copy(res_opt)
else:
res_guide_with_default = CdmAttributeResolutionGuidanceDefinition(self.ctx)
# rename_format is not currently supported for type attributes
res_guide_with_default.rename_format = None
res_guide_with_default._update_attribute_defaults(None)
arc = AttributeResolutionContext(res_opt, res_guide_with_default, rts)
# TODO: remove the resolution guidance if projection is being used
# from the traits of the datatype, purpose and applied here, see if new attributes get generated
rasb.apply_traits(arc)
rasb.generate_applier_attributes(arc, False) # false = don't apply these traits to added things
# this may have added symbols to the dependencies, so merge them
res_opt._symbol_ref_set._merge(arc.res_opt._symbol_ref_set)
if self.projection:
proj_directive = ProjectionDirective(res_opt, self)
proj_ctx = self.projection._construct_projection_context(proj_directive, under, rasb.ras)
ras = self.projection._extract_resolved_attributes(proj_ctx)
rasb.ras = ras
return rasb
def _construct_resolved_attributes(
self,
res_opt: 'ResolveOptions',
under: Optional['CdmAttributeContext'] = None
) -> 'ResolvedAttributeSetBuilder':
from cdm.resolvedmodel import AttributeResolutionContext, ResolvedAttribute, ResolvedAttributeSetBuilder, ResolvedTrait
from cdm.utilities import AttributeContextParameters, AttributeResolutionDirectiveSet
from .cdm_attribute_resolution_guidance_def import CdmAttributeResolutionGuidanceDefinition
from .cdm_object import CdmObject
rasb = ResolvedAttributeSetBuilder()
ctx_ent = self.entity
under_att = under
acp_ent = None
ctx_ent_obj_def = ctx_ent.fetch_object_definition(res_opt)
if ctx_ent_obj_def.object_type == CdmObjectType.PROJECTION_DEF:
# A Projection
proj_directive = ProjectionDirective(res_opt, self, ctx_ent)
proj_def = ctx_ent_obj_def
projCtx = proj_def._construct_projection_context(
proj_directive, under)
ras = proj_def._extract_resolved_attributes(projCtx)
rasb.ras = ras
else:
# An Entity Reference
if under_att:
# make a context for this attribute that holds the attributes that come up from the entity
acp_ent = AttributeContextParameters(
under=under_att,
type=CdmAttributeContextType.ENTITY,
name=ctx_ent.fetch_object_definition_name(),
regarding=ctx_ent,
include_traits=True)
rts_this_att = self._fetch_resolved_traits(res_opt)
# this context object holds all of the info about what needs to happen to resolve these attributes.
# make a copy and add defaults if missing
res_guide_with_default = None
if self.resolution_guidance is not None:
res_guide_with_default = self.resolution_guidance.copy(res_opt)
else:
res_guide_with_default = CdmAttributeResolutionGuidanceDefinition(
self.ctx)
res_guide_with_default._update_attribute_defaults(self.name)
arc = AttributeResolutionContext(res_opt, res_guide_with_default,
rts_this_att)
# complete cheating but is faster.
# this purpose will remove all of the attributes that get collected here, so dumb and slow to go get them
rel_info = self._get_relationship_info(arc.res_opt, arc)
if rel_info.is_by_ref:
# make the entity context that a real recursion would have give us
if under:
under = rasb.ras.create_attribute_context(res_opt, acp_ent)
# if selecting from one of many attributes, then make a context for each one
if under and rel_info.selects_one:
# the right way to do this is to get a resolved entity from the embedded entity and then
# look through the attribute context hierarchy for non-nested entityReferenceAsAttribute nodes
# that seems like a disaster waiting to happen given endless looping, etc.
# for now, just insist that only the top level entity attributes declared in the ref entity will work
ent_pick_from = self.entity.fetch_object_definition(
res_opt)
atts_pick = ent_pick_from.attributes
if ent_pick_from and atts_pick:
for attribute in atts_pick:
if attribute.object_type == CdmObjectType.ENTITY_ATTRIBUTE_DEF:
# a table within a table. as expected with a selects_one attribute
# since this is by ref, we won't get the atts from the table, but we do need the traits that hold the key
# these are the same contexts that would get created if we recursed
# first this attribute
acp_ent_att = AttributeContextParameters(
under=under,
type=CdmAttributeContextType.
ATTRIBUTE_DEFINITION,
name=attribute.
fetch_object_definition_name(),
regarding=attribute,
include_traits=True)
pick_under = rasb.ras.create_attribute_context(
res_opt, acp_ent_att)
# and the entity under that attribute
pick_ent = attribute.entity
pick_ent_type = CdmAttributeContextType.PROJECTION if pick_ent.fetch_object_definition(
res_opt
).object_type == CdmObjectType.PROJECTION_DEF else CdmAttributeContextType.ENTITY
acp_ent_att_ent = AttributeContextParameters(
under=pick_under,
type=pick_ent_type,
name=pick_ent.fetch_object_definition_name(
),
regarding=pick_ent,
include_traits=True)
rasb.ras.create_attribute_context(
res_opt, acp_ent_att_ent)
# if we got here because of the max depth, need to impose the directives to make the trait work as expected
if rel_info.max_depth_exceeded:
if not arc.res_opt.directives:
arc.res_opt.directives = AttributeResolutionDirectiveSet(
)
arc.res_opt.directives.add('referenceOnly')
else:
res_link = CdmObject._copy_resolve_options(res_opt)
res_link._symbol_ref_set = res_opt._symbol_ref_set
res_link._relationship_depth = rel_info.next_depth
rasb.merge_attributes(
self.entity._fetch_resolved_attributes(res_link, acp_ent))
# from the traits of purpose and applied here, see if new attributes get generated
rasb.ras.attribute_context = under_att
rasb.apply_traits(arc)
rasb.generate_applier_attributes(
arc, True) # True = apply the prepared traits to new atts
# this may have added symbols to the dependencies, so merge them
res_opt._symbol_ref_set._merge(arc.res_opt._symbol_ref_set)
# use the traits for linked entity identifiers to record the actual foreign key links
if rasb.ras and rasb.ras._set and rel_info.is_by_ref:
for att in rasb.ras._set:
reqd_trait = att.resolved_traits.find(
res_opt, 'is.linkedEntity.identifier')
if not reqd_trait:
continue
if not reqd_trait.parameter_values:
logger.warning(
self._TAG, self.ctx,
'is.linkedEntity.identifier does not support arguments'
)
continue
ent_references = []
att_references = []
def add_entity_reference(entity_ref: 'CdmEntityReference',
namespace: str):
ent_def = entity_ref.fetch_object_definition(res_opt)
required_trait = entity_ref._fetch_resolved_traits(
res_opt).find(res_opt, 'is.identifiedBy')
if required_trait and ent_def:
att_ref = required_trait.parameter_values.fetch_parameter_value(
'attribute').value
att_name = att_ref.named_reference.split('/')[-1]
# path should be absolute and without a namespace
relative_ent_path = self.ctx.corpus.storage.create_absolute_corpus_path(
ent_def.at_corpus_path, ent_def.in_document)
if relative_ent_path.startswith(namespace + ':'):
relative_ent_path = relative_ent_path[
len(namespace) + 1:]
ent_references.append(relative_ent_path)
att_references.append(att_name)
if rel_info.selects_one:
ent_pick_from = self.entity.fetch_object_definition(
res_opt)
atts_pick = ent_pick_from.attributes if ent_pick_from else None
if atts_pick:
for attribute in atts_pick:
if attribute.object_type == CdmObjectType.ENTITY_ATTRIBUTE_DEF:
add_entity_reference(
attribute.entity,
self.in_document.namespace)
else:
add_entity_reference(self.entity,
self.in_document.namespace)
c_ent = self.ctx.corpus.make_object(
CdmObjectType.CONSTANT_ENTITY_DEF)
c_ent.entity_shape = self.ctx.corpus.make_ref(
CdmObjectType.ENTITY_REF, 'entityGroupSet', True)
c_ent.constant_values = [[
entity_ref, att_references[idx]
] for idx, entity_ref in enumerate(ent_references)]
param = self.ctx.corpus.make_ref(CdmObjectType.ENTITY_REF,
c_ent, False)
reqd_trait.parameter_values.update_parameter_value(
res_opt, 'entityReferences', param)
# a 'structured' directive wants to keep all entity attributes together in a group
if arc and arc.res_opt.directives and arc.res_opt.directives.has(
'structured'):
ra_sub = ResolvedAttribute(rts_this_att.res_opt, rasb.ras,
self.name,
rasb.ras.attribute_context)
if rel_info.is_array:
# put a resolved trait on this att group, yuck,
# hope I never need to do this again and then need to make a function for this
tr = self.ctx.corpus.make_object(CdmObjectType.TRAIT_REF,
'is.linkedEntity.array',
True)
t = tr.fetch_object_definition(res_opt)
rt = ResolvedTrait(t, None, [], [])
ra_sub.resolved_traits = ra_sub.resolved_traits.merge(
rt, True)
rasb = ResolvedAttributeSetBuilder()
rasb.own_one(ra_sub)
return rasb