Class: SetInstanceFieldHandler

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

Instance Method Summary collapse

Methods inherited from AbstractCommandHandler

#handle_command, #iterate

Constructor Details

#initialize ⇒ SetInstanceFieldHandler

Returns a new instance of SetInstanceFieldHandler.



6
7
8
 
# File 'lib/hypertube-ruby-sdk/core/handler/set_instance_field_handler.rb', line 6

def initialize
  @required_parameters_count = 3
end

Instance Method Details

#process(command) ⇒ Object 



10
11
12
 
# File 'lib/hypertube-ruby-sdk/core/handler/set_instance_field_handler.rb', line 10

def process(command)
  set_instance_field(command)
end

#set_instance_field(command) ⇒ Object 



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'lib/hypertube-ruby-sdk/core/handler/set_instance_field_handler.rb', line 14

def set_instance_field(command)
  if command.payload.length < @required_parameters_count
    raise ArgumentError.new 'Set Instance Field parameters mismatch'
  end

  instance = command.payload[0]
  value = command.payload[1]
  if instance.instance_variable_defined?(value)
    instance.instance_variable_set(value, command.payload[2])
  else
    fields = instance.instance_variables
    message = "Field #{command.payload[1]} not found in class #{instance.class.name}. Available fields:\n"
    fields.each { |field_iter| message += "#{field_iter} \n" }
    raise ArgumentError, message
  end
  instance
end