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/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

Defined Under Namespace

Classes: Binding, Clause, ClauseMatchSideEffect, ClauseMatchSideEffects, Comparison, CompilationContext, Constraint, ContextNote, Definition, Enforcement, EntityType, Fact, FactType, Import, Literal, Negate, ObjectType, Operation, PresenceConstraint, Product, Quantifier, Query, Reciprocal, Reference, ReferenceMode, RingConstraint, SetComparisonConstraint, SetConstraint, SetEqualityConstraint, SetExclusionConstraint, SubsetConstraint, Sum, Unit, ValueConstraint, ValueType, Vocabulary

Constant Summary collapse

LANGUAGES = 
{
  'en' => 'English',
  'fr' => 'French',
  'cn' => 'Mandarin'
}

Constants included from ActiveFacts

VERSION

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Parser

#context, #parse, #parse_all

Constructor Details

#initialize(*a) ⇒ Compiler

Returns a new instance of Compiler.



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# File 'lib/activefacts/cql/compiler.rb', line 27

def initialize *a
  @filename = a.shift || "stdio"
  super *a
  @constellation = ActiveFacts::API::Constellation.new(ActiveFacts::Metamodel)
  @language = nil
  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 25

def vocabulary
  @vocabulary
end

Instance Method Details

#compile(input) ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 59

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
        @vocabulary = value if ast.is_a?(Compiler::Vocabulary)
      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
  end
  raise failure_reason unless ok
  vocabulary
end

#compile_definition(ast) ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 120

def compile_definition ast
  ast.compile
end

#compile_file(filename) ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 35

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

#compile_import(file, aliases) ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 94

def compile_import file, aliases
  saved_index = @index
  saved_block = @block
  saved_string = @string
  saved_input_length = @input_length
  old_filename = @filename
  @filename = File.dirname(old_filename)+'/'+file+'.cql'

  # REVISIT: Save and use another @vocabulary for this file?
  File.open(@filename) do |f|
    ok = parse_all(f.read, nil, &@block)
  end

rescue => e
  ne = StandardError.new("In #{@filename} #{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
  @filename = old_filename
  nil
end

#detect_language ⇒ Object

Load the appropriate natural language module



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# File 'lib/activefacts/cql/compiler.rb', line 46

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

#include_language ⇒ Object 



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# File 'lib/activefacts/cql/compiler.rb', line 52

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

#unit?(s) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/activefacts/cql/compiler.rb', line 124

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