Class: GetInstanceFieldHandler

Inherits:
AbstractCommandHandler show all
Defined in:
lib/javonet-ruby-sdk/core/handler/get_instance_field_handler.rb

Instance Method Summary collapse

Methods inherited from AbstractCommandHandler

#handle_command, #iterate

Constructor Details

#initialize ⇒ GetInstanceFieldHandler

Returns a new instance of GetInstanceFieldHandler.



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# File 'lib/javonet-ruby-sdk/core/handler/get_instance_field_handler.rb', line 6

def initialize
  @required_parameters_count = 2
end

Instance Method Details

#get_instance_field(command) ⇒ Object 



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# File 'lib/javonet-ruby-sdk/core/handler/get_instance_field_handler.rb', line 14

def get_instance_field(command)
  raise ArgumentError.new 'Instance field parameters mismatch' if command.payload.length != @required_parameters_count

  instance = command.payload[0]
  value = command.payload[1]
  if instance.instance_variable_defined?(value)
    response = instance.instance_variable_get(value)
  else
    fields = instance.instance_variables
    message = "Field #{command.payload[1]} not found in object of class #{instance.class.name}. Available fields:\n"
    fields.each { |field_iter| message += "#{field_iter}\n" }
    raise ArgumentError, message
  end
  response
end

#process(command) ⇒ Object 



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# File 'lib/javonet-ruby-sdk/core/handler/get_instance_field_handler.rb', line 10

def process(command)
  get_instance_field(command)
end