Class: RGen::Instantiator::JsonInstantiator

Inherits:
Object
  • Object
show all
Defined in:
lib/rgen/instantiator/json_instantiator.rb

Instance Method Summary collapse

Constructor Details

#initialize(env, mm, options = {}) ⇒ JsonInstantiator

Returns a new instance of JsonInstantiator.



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# File 'lib/rgen/instantiator/json_instantiator.rb', line 10

def initialize(env, mm, options={})
  @env = env
  @mm = mm
  @options = options
  @unresolvedReferences = []
  @parser = JsonParser.new(self)
end

Instance Method Details

#createObject(hash) ⇒ Object 



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# File 'lib/rgen/instantiator/json_instantiator.rb', line 27

def createObject(hash)
  className = hash["_class"]
  raise "no class information" unless className
  clazz = @mm.const_get(className)
  raise "class not found: #{className}" unless clazz
  hash.delete("_class")
  urefs = []
  hash.keys.each do |k|
    f = eFeature(k, clazz)
    hash[k] = [hash[k]] if f.many && !hash[k].is_a?(Array)
    if f.is_a?(RGen::ECore::EReference) && !f.containment
      if f.many
        idents = hash[k]
        hash[k] = idents.collect do |i|
          proxy = RGen::MetamodelBuilder::MMProxy.new(i)
          urefs << ReferenceResolver::UnresolvedReference.new(nil, k, proxy)
          proxy
        end
      else
        ident = hash[k]
        ident = ident.first if ident.is_a?(Array)
        proxy = RGen::MetamodelBuilder::MMProxy.new(ident)
        hash[k] = proxy
        urefs << ReferenceResolver::UnresolvedReference.new(nil, k, proxy)
      end
    elsif f.eType.is_a?(RGen::ECore::EEnum)
      hash[k] = hash[k].to_sym
    elsif f.eType.instanceClassName == "Float"
      hash[k] = hash[k].to_f
    end
  end  
  obj = @env.new(clazz, hash)
  urefs.each do |r|
    r.element = obj
    @unresolvedReferences << r 
  end
  obj
end

#instantiate(str) ⇒ Object

creates the elements described by the json string str returns an array of ReferenceResolver::UnresolvedReference describing the references which could not be resolved



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# File 'lib/rgen/instantiator/json_instantiator.rb', line 21

def instantiate(str)
  root = @parser.parse(str)
  resolver = QualifiedNameResolver.new(root, @options)
  resolver.resolveReferences(@unresolvedReferences)
end