Class: MethodChainable::Proxy

Inherits:
Object
  • Object
show all
Defined in:
lib/method_chainable/proxy.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(m_chainable, input) ⇒ Proxy

Returns a new instance of Proxy.



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# File 'lib/method_chainable/proxy.rb', line 14

def initialize(m_chainable, input)
  @m_chainable = m_chainable
  @output = output
  @input = input
  @m_chain_count = 0
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(m, *args, &block) ⇒ Object

Remembers the output of the previous call and passes on to the new one



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# File 'lib/method_chainable/proxy.rb', line 33

def method_missing(m, *args, &block)
  m = m.to_s

  # Return the final output if value is called
  if m == 'val'
    return output
  else

    # Since value is not called yet keep calling
    # the actual method on chainable and pass
    # the previous output

    if m_chainable.respond_to? m
      arg = (@m_chain_count == 0) ? input : output
      arity = m_chainable.method(m).arity

      if arity > 0
        @output = m_chainable.send(m, arg)
      else
        @output = m_chainable.send(m)
      end

      @m_chain_count += 1

      return self
    else
      super(m, *args, &block)
    end
  end
end

Instance Attribute Details

#input ⇒ Object

Returns the value of attribute input.



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# File 'lib/method_chainable/proxy.rb', line 8

def input
  @input
end

#m_chain_count ⇒ Object

Returns the value of attribute m_chain_count.



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# File 'lib/method_chainable/proxy.rb', line 8

def m_chain_count
  @m_chain_count
end

#m_chainable ⇒ Object

Returns the value of attribute m_chainable.



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# File 'lib/method_chainable/proxy.rb', line 8

def m_chainable
  @m_chainable
end

#output ⇒ Object

Returns the value of attribute output.



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# File 'lib/method_chainable/proxy.rb', line 8

def output
  @output
end