Class: ActiveFacts::CQL::Compiler::Definition
- Inherits:
-
Object
- Object
- ActiveFacts::CQL::Compiler::Definition
- Defined in:
- lib/activefacts/cql/compiler/query.rb,
lib/activefacts/cql/compiler/shared.rb
Direct Known Subclasses
Constraint, Fact, Import, InformalDefinition, ObjectType, TransformRule, Unit, Vocabulary
Instance Attribute Summary collapse
-
#constellation ⇒ Object
Returns the value of attribute constellation.
-
#tree ⇒ Object
Returns the value of attribute tree.
-
#vocabulary ⇒ Object
Returns the value of attribute vocabulary.
Instance Method Summary collapse
-
#all_bindings_in_clauses(clauses) ⇒ Object
Return the unique array of all bindings in these clauses, including in objectification steps.
- #assert_literal_value(val) ⇒ Object
- #build_all_steps(query, clauses_list) ⇒ Object
- #build_step(query, clause, roles_by_binding = {}, parent_variable = nil) ⇒ Object
-
#build_variables(clauses_list) ⇒ Object
Make a Variable for every binding present in these clauses.
- #compile ⇒ Object
- #source ⇒ Object
- #to_s ⇒ Object
Instance Attribute Details
#constellation ⇒ Object
Returns the value of attribute constellation.
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# File 'lib/activefacts/cql/compiler/shared.rb', line 99 def constellation @constellation end |
#tree ⇒ Object
Returns the value of attribute tree.
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# File 'lib/activefacts/cql/compiler/shared.rb', line 99 def tree @tree end |
#vocabulary ⇒ Object
Returns the value of attribute vocabulary.
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# File 'lib/activefacts/cql/compiler/shared.rb', line 99 def vocabulary @vocabulary end |
Instance Method Details
#all_bindings_in_clauses(clauses) ⇒ Object
Return the unique array of all bindings in these clauses, including in objectification steps
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# File 'lib/activefacts/cql/compiler/query.rb', line 100 def all_bindings_in_clauses clauses clauses.map do |clause| clause.refs.map do |ref| raise "Binding reference #{ref.inspect} is not bound to a binding" unless ref.binding [ref.binding] + (ref.nested_clauses ? all_bindings_in_clauses(ref.nested_clauses) : []) end end. flatten. uniq end |
#assert_literal_value(val) ⇒ Object
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# File 'lib/activefacts/cql/compiler/shared.rb', line 112 def assert_literal_value(val) if val.is_a?(String) @constellation.Value(eval(val), true, nil) elsif val @constellation.Value(val.to_s, false , nil) else nil end end |
#build_all_steps(query, clauses_list) ⇒ Object
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# File 'lib/activefacts/cql/compiler/query.rb', line 29 def build_all_steps(query, clauses_list) roles_by_binding = {} trace :query, "Building steps" do clauses_list.each do |clause| build_step(query, clause, roles_by_binding) end end roles_by_binding end |
#build_step(query, clause, roles_by_binding = {}, parent_variable = nil) ⇒ Object
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# File 'lib/activefacts/cql/compiler/query.rb', line 39 def build_step query, clause, roles_by_binding = {}, parent_variable = nil return unless clause.refs.size > 0 # Empty clause... really? # A bare object type is a valid clause, but it contains no fact type hence no step if clause.fact_type step = @constellation.Step( query, query.all_step.size, :fact_type => clause.fact_type, :alternative_set => nil, :is_disallowed => clause.certainty == false, :is_optional => clause.certainty == nil ) end trace :query, "Creating Plays for #{clause.inspect} with #{clause.refs.size} refs" do is_input = true clause.refs.each do |ref| # These refs are the Compiler::References, which have associated Metamodel::RoleRefs, # but we need to create Plays for those roles. # REVISIT: Plays may need to save residual_adjectives binding = ref.binding role = (ref && ref.role) || (ref.role_ref && ref.role_ref.role) objectification_step = nil if ref.nested_clauses ref.nested_clauses.each do |nested_clause| objectification_step = build_step(query, nested_clause, roles_by_binding) if ref.binding.player.is_a?(ActiveFacts::Metamodel::EntityType) and ref.binding.player.fact_type == nested_clause.fact_type objectification_step.objectification_variable = binding.variable end end end if clause.is_naked_object_type raise "#{self} lacks a proper objectification" if clause.refs[0].nested_clauses and !objectification_step return objectification_step end if binding.variable.object_type != role.object_type # Type mismatch if binding.variable.object_type.common_supertype(role.object_type) # REVISIT: there's an implicit subtyping step here, create it; then always raise the error here. # I don't want to do this for now because the verbaliser will always verbalise all steps. # raise "Disallowing implicit subtyping step from #{role.object_type.name} to #{binding.variable.object_type.name} in #{clause.fact_type.default_reading.inspect}" else raise "A #{role.object_type.name} cannot satisfy #{binding.variable.object_type.name} in #{clause.fact_type.default_reading.inspect}" end end trace :query, "Creating Play for #{ref.inspect}" play = @constellation.Play(:step => step, :role => role, :variable => binding.variable) play.is_input = is_input is_input = false roles_by_binding[binding] = [role, play] end end step end |
#build_variables(clauses_list) ⇒ Object
Make a Variable for every binding present in these clauses
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# File 'lib/activefacts/cql/compiler/query.rb', line 6 def build_variables(clauses_list) trace :query, "Building variables" do query = @constellation.Query(:new) all_bindings_in_clauses(clauses_list). each do |binding| var_name = (r = binding.refs.select{|r| r.is_a?(Reference)}.first) ? r.var_name : nil trace :query, "Creating variable #{query.all_variable.size} for #{binding.inspect} with role_name #{var_name}" binding.variable = @constellation.Variable( query, query.all_variable.size, :object_type => binding.player, role_name: var_name ) if literal = binding.refs.detect{|r| r.literal} if literal.kind_of?(ActiveFacts::CQL::Compiler::Reference) # REVISIT: Fix this crappy ad-hoc polymorphism hack literal = literal.literal end unit = @constellation.Unit.detect{|k, v| [v.name, v.plural_name].include? literal.unit} if literal.unit binding.variable.value = [literal.literal.to_s, literal.literal.is_a?(String), unit] end end query end end |
#compile ⇒ Object
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# File 'lib/activefacts/cql/compiler/shared.rb', line 100 def compile raise "#{self.class} should implement the compile method" end |
#source ⇒ Object
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# File 'lib/activefacts/cql/compiler/shared.rb', line 108 def source @tree.text_value end |
#to_s ⇒ Object
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# File 'lib/activefacts/cql/compiler/shared.rb', line 104 def to_s @vocabulary ? "#{vocabulary.to_s}::" : '' end |