Class: CarryOut::Unit

Inherits:
Object
  • Object
show all
Defined in:
lib/carry_out/unit.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Unit

Returns a new instance of Unit.



8
9
10
11
12
 
# File 'lib/carry_out/unit.rb', line 8

def initialize
  self.class.parameter_defaults.each do |p, d|
    instance_variable_set("@#{p}", d)
  end
end

Class Method Details

.appending_parameter(method_name, var) ⇒ Object 



24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/carry_out/unit.rb', line 24

def self.appending_parameter(method_name, var)
  instance_var = "@#{var}"

  define_method(method_name.to_sym) do |value|
    existing = 
      if instance_variable_defined?(instance_var)
        [ instance_variable_get("@#{var}") ].flatten(1)
      else
        []
      end
    
    instance_variable_set(instance_var, (existing || []) << value)
    self
  end
end

.call {|unit| ... } ⇒ Object

Yields:

  • (unit) 


14
15
16
17
18
 
# File 'lib/carry_out/unit.rb', line 14

def self.call(&block)
  unit = self.new
  yield unit if block
  unit.call
end

.has_parameter?(method) ⇒ Boolean

Returns:

  • (Boolean) 


20
21
22
 
# File 'lib/carry_out/unit.rb', line 20

def self.has_parameter?(method)
  self.instance_methods.include?(method)
end

.parameter(method_name, var = nil, options = {}) ⇒ Object 



40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
 
# File 'lib/carry_out/unit.rb', line 40

def self.parameter(method_name, var = nil, options = {})
  if var.kind_of?(Hash)
    options = var 
    var = nil
  end

  var ||= method_name

  define_method(method_name.to_sym) do |*args|
    instance_variable_set("@#{var}", args.length == 0 ? true : args.first)
    self
  end

  parameter_defaults[var] = options[:default] unless options[:default].nil?
end

.parameter_defaults ⇒ Object 



56
57
58
 
# File 'lib/carry_out/unit.rb', line 56

def self.parameter_defaults
  @parameter_defaults ||= {}
end

Instance Method Details

#call ⇒ Object 



4
5
6
 
# File 'lib/carry_out/unit.rb', line 4

def call
  raise "Expected #{self.class} to define #{self.class}#call" unless self.class == Unit
end