Class: RubyHaze::Persisted::Shadow::Generator

Inherits:
Object
  • Object
show all
Defined in:
lib/rubyhaze/persisted/shadow_class_generator.rb

Class Method Summary collapse

Class Method Details

.attribute_load_types ⇒ Object 



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# File 'lib/rubyhaze/persisted/shadow_class_generator.rb', line 22

def attribute_load_types
  {
    :string  => :aload,
    :int     => :iload,
    :boolean => :iload,
    :double  => :dload,
  }
end

.generate(name, attributes) ⇒ Object 



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# File 'lib/rubyhaze/persisted/shadow_class_generator.rb', line 61

def generate(name, attributes)
  tmp_path = (ENV['RUBYHAZE_PERSISTED_TMP_PATH'] || File.join(Dir.pwd, 'tmp'))
  builder = BiteScript::FileBuilder.new name + '.class'
  str = template name, attributes
  if $DEBUG
    FileUtils.mkdir_p tmp_path
    filename = File.join tmp_path, name + '.bc'
    puts ">> Saving bitescript [#{filename}]..."
    File.open(filename, 'w') { |file| file.write str }
  end
  builder.instance_eval str, __FILE__, __LINE__
  safe_name = name.gsub '::', '__'
  builder.generate do |builder_filename, class_builder|
    bytes = class_builder.generate
    klass = JRuby.runtime.jruby_class_loader.define_class builder_filename[0..-7].gsub('/', '.'), bytes.to_java_bytes
    if $DEBUG
      filename = File.join tmp_path, builder_filename
      FileUtils.mkdir_p File.dirname(filename)
      puts ">> Saving class [#{filename}]..."
      File.open(filename, 'w') { |file| file.write class_builder.generate }
    end
    RubyHaze::Persisted::Shadow::Classes.const_set safe_name, JavaUtilities.get_proxy_class(klass.name)
  end
  RubyHaze::Persisted::Shadow::Classes.const_get safe_name
end

.get(name, attributes) ⇒ Object 



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# File 'lib/rubyhaze/persisted/shadow_class_generator.rb', line 15

def get(name, attributes)
  safe_name = name.gsub '::', '__'
  RubyHaze::Persisted::Shadow::Classes.const_defined?(safe_name) ?
    RubyHaze::Persisted::Shadow::Classes.const_get(safe_name) :
    generate(name, attributes)
end

.template(name, attributes) ⇒ Object 



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# File 'lib/rubyhaze/persisted/shadow_class_generator.rb', line 31

def template(name, attributes)
  str = []
  packages = %w{org rubyhaze persisted shadow classes}
  names = name.split '::'
  name = names.pop
  packages += names
  str << "package '#{packages.join('.')}' do"
  str << %{  public_class "#{name}", object, Java::JavaIo::Serializable do}
  attributes.each do |attr_name, type, options|
    str << %{    public_field :#{attr_name}, send(:#{type})}
  end
  str << %{    public_constructor [], #{attributes.map { |ary| ary[1].to_s }.join(', ')} do}
  str << %{      aload 0}
  str << %{      invokespecial object, "<init>", [void]}
  index = 1
  attributes.each do |attr_name, type, options|
    str << %{      aload 0}
    load_type = attribute_load_types[type]
    raise "Unknown load type for attribute [#{attr_name}] on class [#{name}]" unless load_type
    str << %{      #{load_type} #{index}}
    index += 1
    str << %{      putfield this, :#{attr_name}, send(:#{type})}
  end
  str << %{      returnvoid}
  str << %{    end}
  str << %{  end}
  str << %{end}
  str.join("\n")
end