Class: ActiveFacts::CQL::Compiler

Inherits:
Parser
  • Object
show all
Defined in:
lib/activefacts/cql/compiler.rb,
lib/activefacts/cql/compiler/fact.rb,
lib/activefacts/cql/compiler/query.rb,
lib/activefacts/cql/compiler/clause.rb,
lib/activefacts/cql/compiler/shared.rb,
lib/activefacts/cql/compiler/informal.rb,
lib/activefacts/cql/compiler/fact_type.rb,
lib/activefacts/cql/compiler/constraint.rb,
lib/activefacts/cql/compiler/expression.rb,
lib/activefacts/cql/compiler/value_type.rb,
lib/activefacts/cql/compiler/entity_type.rb,
lib/activefacts/cql/compiler/transform_rule.rb

Defined Under Namespace

Classes: Aggregate, Binding, Clause, ClauseMatchSideEffect, ClauseMatchSideEffects, Comparison, CompilationContext, CompoundMatching, Constraint, ContextNote, Definition, Enforcement, EntityType, ExpressionTermList, Fact, FactType, Import, InformalDefinition, Literal, LogicalAnd, LogicalOr, Negate, Negation, ObjectType, Operation, PresenceConstraint, Product, Quantifier, Query, Reciprocal, Reference, ReferenceMode, RingConstraint, SetComparisonConstraint, SetConstraint, SetEqualityConstraint, SetExclusionConstraint, SimpleMatching, SubsetConstraint, Sum, Ternary, TransformRule, Unit, ValueConstraint, ValueType, Vocabulary

Constant Summary collapse

LANGUAGES = 
{
  'en' => 'English',
  'fr' => 'French',
  'cn' => 'Mandarin'
}
EXTENSIONS = 
['fiml', 'fidl', 'fiql', 'cql']

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Parser

#context, #parse, #parse_all

Constructor Details

#initialize(filepath, options = {}) ⇒ Compiler

Returns a new instance of Compiler.



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# File 'lib/activefacts/cql/compiler.rb', line 31

def initialize filepath, options = {}
  @filepath = filepath
  super()
  if @constellation = options[:constellation]
    @vocabulary = @constellation.Vocabulary.values[0]
    @constellation.ValueType.values.each do |object_type|
      context.object_type(object_type.name, "value type")
    end
    @constellation.EntityType.values.each do |object_type|
      context.object_type(object_type.name, "entity type")
    end
  else
    @constellation = ActiveFacts::API::Constellation.new(ActiveFacts::Metamodel)
  end
  @constellation = options[:constellation] || ActiveFacts::API::Constellation.new(ActiveFacts::Metamodel)
  @constellation.loggers << proc{|*k| trace :apilog, k.inspect} if trace(:apilog)
  @language = nil
  @pending_import_topic = nil
  @pending_import_role = ''
  @pending_import_file_name = ''
  trace :file, "Parsing '#{@filename}'"
end

Instance Attribute Details

#vocabulary ⇒ Object (readonly)

Returns the value of attribute vocabulary.



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# File 'lib/activefacts/cql/compiler.rb', line 29

def vocabulary
  @vocabulary
end

Class Method Details

.build_transform_target_refs(context, targ_term_list, transform_rule) ⇒ Object 



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# File 'lib/activefacts/cql/compiler/transform_rule.rb', line 25

def self.build_transform_target_refs context, targ_term_list, transform_rule
  vocabulary_identifier = context.vocabulary.identifying_role_values
  constellation = context.vocabulary.constellation

  targ_term_list.flatten!
  (0 ... targ_term_list.size).each do |idx|
    ref = targ_term_list[idx]
    if (target_ot = constellation.ObjectType[[vocabulary_identifier, ref.term]]).nil?
      raise "Target object '#{ref.term}' of transformation must be a valid object type"
    end
    constellation.TransformTargetRef(
      transform_rule, idx, :object_type => target_ot,
      :leading_adjective => ref.leading_adjective, :trailing_adjective => ref.trailing_adjective
    )
  end
end

Instance Method Details

#compile(input) ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 104

def compile input
  include_language

  @string = input

  # The syntax tree created from each parsed CQL statement gets passed to the block.
  # parse_all returns an array of the block's non-nil return values.
  ok = parse_all(@string, :definition) do |node|
    trace :parse, "Parsed '#{node.text_value.gsub(/\s+/,' ').strip}'" do
      trace :lex, (proc { node.inspect })
      begin
        ast = node.ast
        next unless ast
        trace :ast, ast.inspect
        ast.tree = node
        ast.constellation = @constellation
        ast.vocabulary = @vocabulary
        value = compile_definition ast
        trace :definition, "Compiled to #{value.is_a?(Array) ? value.map{|v| v.verbalise}*', ' : value.verbalise}" if value
        if value.is_a?(ActiveFacts::Metamodel::Topic)
          topic_flood() if @topic
          create_import_if_pending(value)
          @topic = value
        elsif ast.is_a?(Compiler::Vocabulary)
          topic_flood() if @topic
          @vocabulary = value
          @topic = @constellation.Topic(@vocabulary.name)
        end
      rescue => e
        # Augment the exception message, but preserve the backtrace
        start_line = @string.line_of(node.interval.first)
        end_line = @string.line_of(node.interval.last-1)
        lines = start_line != end_line ? "s #{start_line}-#{end_line}" : " #{start_line.to_s}"
        ne = StandardError.new("at line#{lines} #{e.message.strip}")
        ne.set_backtrace(e.backtrace)
        raise ne
      end
    end
    topic_flood() if @topic
  end
  raise failure_reason unless ok
  vocabulary
end

#compile_definition(ast) ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 216

def compile_definition ast
  ast.compile
end

#compile_file(filepath) ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 54

def compile_file filepath
  old_filepath = @filepath
  @filepath = filename
  File.open(filepath) do |f|
    compile(f.read)
  end
  @filepath = old_filepath
  @vocabulary
end

#compile_import(file, import_role, aliases) ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 148

def compile_import file, import_role, aliases
  saved_index = @index
  saved_block = @block
  saved_string = @string
  saved_input_length = @input_length
  old_filepath = @filepath
  @file = file
  @filepath = import_filepath(old_filepath, file)

  compile_import_file(@filepath, import_role)

rescue => e
  ne = StandardError.new("In #{@filepath} #{e.message.strip}")
  ne.set_backtrace(e.backtrace)
  raise ne
ensure
  @block = saved_block
  @index = saved_index
  @input_length = saved_input_length
  @string = saved_string
  @filepath = old_filepath
  nil
end

#compile_import_file(filepath, import_role) ⇒ Object

redefine in subsclass for different behaviour



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# File 'lib/activefacts/cql/compiler.rb', line 183

def compile_import_file filepath, import_role
  # REVISIT: Save and use another @vocabulary for this file?
  File.open(filepath) do |f|
    compile_import_input(f.read, import_role)
  end
end

#compile_import_input(input, import_role) ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 190

def compile_import_input input, import_role
  topic_external_name = @file

  if existing_topic = @constellation.Topic[[topic_external_name]]
    # topic has already been loaded, just build import
    trace :import, "Topic #{@topic.topic_name} has already been loaded, skip reload"
    import = @constellation.Import(
      topic: @topic, precursor_topic: existing_topic, 
      import_role: import_role, file_name: topic_external_name
    )
  else
    # topic has not been loaded previously, import topic
    saved_topic = @topic
    topic_flood() if @topic

    @pending_import_topic = saved_topic
    @pending_import_role = import_role
    @pending_import_file_name = topic_external_name

    trace :import, "Importing #{@filepath} into #{@topic.topic_name}" do
      ok = parse_all(input, nil, &@block)
    end
    @topic = saved_topic
  end
end

#create_import_if_pending(new_topic) ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 87

def create_import_if_pending new_topic
  if @pending_import_topic
    trace :import, "Topic #{@pending_import_topic.topic_name} imports #{new_topic.topic_name} as #{@pending_import_role} from file #{@pending_import_file_name}"

    @constellation.Import(
      topic: @pending_import_topic,
      precursor_topic: new_topic,
      import_role: @pending_import_role,
      file_name: @pending_import_file_name
    )

    @pending_import_topic = nil
    @pending_import_role = ''
    @pending_import_file_name = ''
  end
end

#detect_language ⇒ Object

Load the appropriate natural language module



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# File 'lib/activefacts/cql/compiler.rb', line 65

def detect_language
  @filepath =~ /.*\.(..)\.cql$/i
  language_code = $1
  @language = LANGUAGES[language_code] || 'English'
end

#import_filepath(old_filepath, file) ⇒ Object

redefine in subsclass for different behaviour



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# File 'lib/activefacts/cql/compiler.rb', line 173

def import_filepath(old_filepath, file)
  filepath = ''
  EXTENSIONS.each do |extension|
    filepath = File.dirname(old_filepath)+'/'+file+".#{extension}"
    break if File.exist?(filepath)
  end
  filepath
end

#include_language ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 71

def include_language
  detect_language unless @langage
  require 'activefacts/cql/parser/Language/'+@language
  language_module = ActiveFacts::CQL.const_get(@language)
  extend language_module
end

#topic_flood ⇒ Object

Mark any new Concepts as belonging to this topic



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# File 'lib/activefacts/cql/compiler.rb', line 79

def topic_flood
  @constellation.Concept.each do |key, concept|
    next if concept.topic
    trace :topic, "Colouring #{concept.describe} with #{@topic.topic_name}"
    concept.topic = @topic
  end
end

#unit?(s) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/activefacts/cql/compiler.rb', line 220

def unit? s
  name = @constellation.Name[s]
  units = (!name ? [] : Array(name.unit) + Array(name.plural_named_unit)).uniq
  trace :units, "Looking for unit #{s}, got #{units.map{|u|u.name}.inspect}"
  units.size > 0
end