Class: ActiveFacts::Metamodel::Component
- Inherits:
-
Object
- Object
- ActiveFacts::Metamodel::Component
- Defined in:
- lib/activefacts/metamodel/datatypes.rb,
lib/activefacts/metamodel/metamodel.rb,
lib/activefacts/metamodel/extensions.rb
Direct Known Subclasses
Constant Summary collapse
- RANK_SURROGATE =
The ranking key of a component indicates its importance to its parent: Ranking assigns a total order, but is computed in groups:
0
- RANK_SUPER =
Supertypes, with the identifying supertype first, others alphabetical
1
- RANK_IDENT =
Identifying components (absorptions, indicator), in order of the identifier
2
- RANK_VALUE =
A ValueField
3
- RANK_INJECTION =
Injections, in alphabetical order
4
- RANK_DISCRIMINATOR =
Discriminator components, in alphabetical order
5
- RANK_FOREIGN =
REVISIT: Foreign key components
6
- RANK_INDICATOR =
Indicators in alphabetical order
7
- RANK_MANDATORY =
Absorption: unique mandatory
8
- RANK_NON_MANDATORY =
Absorption: unique optional
9
- RANK_MULTIPLE =
Absorption: manifold
10
- RANK_SUBTYPE =
Subtypes in alphabetical order
11
- RANK_SCOPING =
Scoping in alphabetical order
12
Instance Method Summary collapse
- #all_role ⇒ Object
- #comment ⇒ Object
- #data_type(context = DataType::DefaultContext.new) ⇒ Object
- #depth ⇒ Object
- #fork_to_new_parent(parent) ⇒ Object
- #in_foreign_key ⇒ Object
- #in_natural_index ⇒ Object
- #in_primary_index ⇒ Object
- #inspect ⇒ Object
- #is_auto_assigned ⇒ Object
- #is_in_primary ⇒ Object
- #is_mandatory ⇒ Object
- #leaves ⇒ Object
- #narrow_value_constraint(value_constraint, nested_value_constraint) ⇒ Object
- #parent_entity_type ⇒ Object
- #path ⇒ Object
- #path_mandatory ⇒ Object
-
#primary_index_components ⇒ Object
REVISIT: This should be a method on Composite, called here as root.primary_index_components.
- #rank_key ⇒ Object
- #rank_kind ⇒ Object
- #rank_path ⇒ Object
- #root ⇒ Object
- #show_trace ⇒ Object
- #uncache_rank_key ⇒ Object
Instance Method Details
#all_role ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2229 def all_role [] end |
#comment ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2241 def comment return '' unless parent ((c = parent.comment) != '' ? c +' and ' : '') + name end |
#data_type(context = DataType::DefaultContext.new) ⇒ Object
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# File 'lib/activefacts/metamodel/datatypes.rb', line 201 def data_type context = DataType::DefaultContext.new case self when Indicator context.boolean_type when SurrogateKey type_name, = *context.surrogate_type ||= {} # Flag but disable auto-assignment for a surrogate that's an FK (assigned elsewhere) [:auto_assign] ||= 'commit' [:auto_assign] = nil if in_foreign_key [:mandatory] = path_mandatory [ type_name, ] when ValidFrom, ValueField, Mapping # Walk up the entity type identifiers (must be single-part) to a value type: vt = self.object_type while vt.is_a?(EntityType) rr = vt.preferred_identifier.role_sequence.all_role_ref.single raise "Can't produce a column for composite #{inspect}" unless rr value_constraint = narrow_value_constraint(value_constraint, rr.role.role_value_constraint) vt = rr.role.object_type end raise "A column can only be produced from a ValueType not a #{vt.class.basename}" unless vt.is_a?(ValueType) if is_a?(Absorption) value_constraint = narrow_value_constraint(value_constraint, child_role.role_value_constraint) end # Gather up the characteristics from the value supertype hierarchy: is_auto_assigned = false stype = vt begin vt = stype # REVISIT: Check for length and scale shortening length ||= vt.length scale ||= vt.scale is_auto_assigned ||= vt.is_auto_assigned unless parent.parent and parent.foreign_key # No need to enforce value constraints that are already enforced by a foreign key value_constraint = narrow_value_constraint(value_constraint, vt.value_constraint) end end while stype = vt.supertype auto_assign = if is_auto_assigned if in_primary_index and !in_foreign_key {auto_assign: is_auto_assigned} # It's auto-assigned here else {auto_assign: nil} # It's auto-assigned elsewhere end else {} # It's not auto-assigned end [ vt.name, (length ? {length: length} : {}). merge!(scale ? {scale: scale} : {}). merge!(auto_assign). merge!({mandatory: path_mandatory}). merge!(value_constraint ? {value_constraint: value_constraint} : {}) ] else raise "Can't make a column from #{component}" end end |
#depth ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2199 def depth parent ? 1+parent.depth : 0 end |
#fork_to_new_parent(parent) ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2246 def fork_to_new_parent parent @constellation.fork self, guid: :new, parent: parent, injection_annotation: nil end |
#in_foreign_key ⇒ Object
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# File 'lib/activefacts/metamodel/datatypes.rb', line 197 def in_foreign_key all_foreign_key_field.detect{|fkf| fkf.foreign_key.source_composite == root} end |
#in_natural_index ⇒ Object
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# File 'lib/activefacts/metamodel/datatypes.rb', line 192 def in_natural_index natural_index = root.natural_index and natural_index.all_index_field.detect{|ixf| ixf.component == self} end |
#in_primary_index ⇒ Object
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# File 'lib/activefacts/metamodel/datatypes.rb', line 187 def in_primary_index primary_index = root.primary_index and primary_index.all_index_field.detect{|ixf| ixf.component == self} end |
#inspect ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2203 def inspect "#{self.class.basename}" end |
#is_auto_assigned ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2237 def is_auto_assigned false end |
#is_in_primary ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2166 def is_in_primary !!(root and p = root.primary_index and p.all_index_field.detect{|f| f.component == self}) end |
#is_mandatory ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2220 def is_mandatory parent.is_mandatory end |
#leaves ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2212 def leaves self end |
#narrow_value_constraint(value_constraint, nested_value_constraint) ⇒ Object
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# File 'lib/activefacts/metamodel/datatypes.rb', line 268 def narrow_value_constraint(value_constraint, nested_value_constraint) # REVISIT: Need to calculate the constrant narrowing return nested_value_constraint || value_constraint end |
#parent_entity_type ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2170 def parent_entity_type parent && parent.object_type.is_a?(EntityType) && parent.object_type end |
#path ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2216 def path (parent ? parent.path+[self] : [self]) end |
#path_mandatory ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2224 def path_mandatory # REVISIT: is_mandatory && parent.path_mandatory end |
#primary_index_components ⇒ Object
REVISIT: This should be a method on Composite, called here as root.primary_index_components
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# File 'lib/activefacts/metamodel/extensions.rb', line 2157 def primary_index_components root and ix = root.primary_index and # Primary index has been decided root.primary_index.all_index_field.size > 0 and # has been populated and ix = root.primary_index and ixfs = ix.all_index_field.sort_by(&:ordinal) and ixfs.map(&:component) end |
#rank_key ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2082 def rank_key @rank_key ||= case self when SurrogateKey if [RANK_SURROGATE] # an injected PK elsif injection_annotation [RANK_INJECTION, name] else [RANK_FOREIGN, name] # an FK end when Indicator if (p = parent_entity_type) and p.preferred_identifier and (position = p.rank_in_preferred_identifier(role.base_role)) [RANK_IDENT, position] # An identifying unary else [RANK_INDICATOR, name || role.name] # A non-identifying unary end when Discriminator [RANK_DISCRIMINATOR, name || child_role.name] when ValueField if injection_annotation [RANK_INJECTION, name] else [RANK_IDENT] end when Absorption if is_type_inheritance # We are traversing a type inheritance fact type. Is this object_type the subtype or supertype? if is_supertype_absorption # What's the rank of this supertype? tis = parent_role.object_type.all_type_inheritance_as_subtype.sort_by{|ti| ti.provides_identification ? '' : ti.supertype.name } [RANK_SUPER, child_role.fact_type.provides_identification ? 0 : 1+tis.index(parent_role.fact_type)] else # What's the rank of this subtype? tis = parent_role.object_type.all_type_inheritance_as_supertype.sort_by{|ti| ti.subtype.name } [RANK_SUBTYPE, tis.index(parent_role.fact_type)] end elsif (p = parent_entity_type) and (position = p.rank_in_preferred_identifier(child_role.base_role)) [RANK_IDENT, position] elsif injection_annotation [RANK_INJECTION, name] else if parent_role.is_unique [parent_role.is_mandatory ? RANK_MANDATORY : RANK_NON_MANDATORY, name || child_role.name] else [RANK_MULTIPLE, name || child_role.name, parent_role.name] end end when Scoping [RANK_SCOPING, name || object_type.name] when ValidFrom [RANK_INJECTION, name] when Mapping # bare Mappings are always injected if root.mapping.object_type == object_type [RANK_IDENT, 0] else [RANK_INJECTION, name] end else raise "unexpected #{self.class.basename} in Component#rank_key" end end |
#rank_kind ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2176 def rank_kind return "top" unless parent # E.g. a Mapping that is a Composite case rank_key[0] when RANK_SURROGATE; "surrogate" when RANK_SUPER; "supertype" when RANK_IDENT; "existential" when RANK_VALUE; "self-value" when RANK_INJECTION; "injection" when RANK_DISCRIMINATOR;"discriminator" when RANK_FOREIGN; "foreignkey" when RANK_INDICATOR; "indicator" when RANK_MANDATORY; "mandatory" when RANK_NON_MANDATORY;"optional" when RANK_MULTIPLE; "multiple" when RANK_SUBTYPE; "subtype" when RANK_SCOPING; "scoping" end end |
#rank_path ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2233 def rank_path (parent ? parent.rank_path+[ordinal] : [ordinal]) end |
#root ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2195 def root parent.root end |
#show_trace ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2207 def show_trace raise "Implemented in subclasses" # trace :composition, "#{ordinal ? "#{ordinal}: " : ''}#{inspect}#{name ? " (as #{name.inspect})" : ''}" end |
#uncache_rank_key ⇒ Object
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# File 'lib/activefacts/metamodel/extensions.rb', line 2078 def uncache_rank_key @rank_key = nil end |