Class: Hooked::Hook

Inherits:

Object

• Object
• Hooked::Hook

show all

Defined in:

lib/hooked/hook.rb

Instance Attribute Summary (collapse)

• - (Object) graph readonly

  Returns the value of attribute graph.

• - (Object) instead_pointcut

  Returns the value of attribute instead_pointcut.

• - (Object) pointcut readonly

  Returns the value of attribute pointcut.

Instance Method Summary (collapse)

• - (Object) add_aspect(*args, &block)
• - (Object) build_chain
• - (Object) call(*args, &block)
• - (Hook) initialize(pointcut = nil, &block) constructor

  A new instance of Hook.

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# File 'lib/hooked/hook.rb', line 5

def initialize(pointcut = nil, &block)
  if (pointcut && block) || (!pointcut && !block)
    raise ArgumentError, "Pass either an argument or a block"
  end

  @pointcut, @graph = (pointcut || block), Graph.new
end

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

def graph
  @graph
end

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

def instead_pointcut
  @instead_pointcut
end

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

def pointcut
  @pointcut
end

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# File 'lib/hooked/hook.rb', line 13

def add_aspect(*args, &block)
  graph << Aspect.new(*args, &block)
end

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# File 'lib/hooked/hook.rb', line 27

def build_chain
pc = instead_pointcut || pointcut
  graph.sort
  graph.output.reverse.inject(pc) do |pointcut, aspect|
    aspect.pointcut = pointcut; aspect
  end
end

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# File 'lib/hooked/hook.rb', line 22

def call(*args, &block)
  @chain = build_chain if graph.changed? || !@chain
  @chain.call *args, &block
end