Class: Hooked::Aspect

Inherits:

Object

• Object
• Hooked::Aspect

show all

Defined in:

lib/hooked/aspect.rb

Instance Attribute Summary (collapse)

• - (Object) advice readonly

  Returns the value of attribute advice.

• - (Object) dependencies readonly

  Returns the value of attribute dependencies.

• - (Object) pointcut

  Returns the value of attribute pointcut.

• - (Object) type readonly

  Returns the value of attribute type.

Instance Method Summary (collapse)

• - (Boolean) after?
• - (Boolean) around?
• - (Boolean) before?
• - (Object) call(*args, &block)
• - (Aspect) initialize(type, advice = nil, dependencies = {}, &block) constructor

  A new instance of Aspect.

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# File 'lib/hooked/aspect.rb', line 6

def initialize(type, advice = nil, dependencies = {}, &block)
  if (advice && block) || (!advice && !block)
    raise ArgumentError, "Pass either an advice argument or a block"
  end
  
  if Hash === advice
    advice, dependencies = nil, advice
  end

  [:before, :after].each {|d| dependencies[d] ||= [] }
  @type, @advice, @dependencies = type, (advice || block), dependencies
end

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# File 'lib/hooked/aspect.rb', line 3

def advice
  @advice
end

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# File 'lib/hooked/aspect.rb', line 3

def dependencies
  @dependencies
end

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# File 'lib/hooked/aspect.rb', line 4

def pointcut
  @pointcut
end

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# File 'lib/hooked/aspect.rb', line 3

def type
  @type
end

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# File 'lib/hooked/aspect.rb', line 37

def after?
  type == :after
end

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# File 'lib/hooked/aspect.rb', line 41

def around?
  type == :around
end

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# File 'lib/hooked/aspect.rb', line 33

def before?
  type == :before
end

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# File 'lib/hooked/aspect.rb', line 19

def call(*args, &block)
  advice.call(args, &block) if before?

  result = if around?
    advice.call pointcut, *args, &block
  else
    pointcut.call *args, &block
  end
  
  advice.call result if after?
  
  result
end