Class: Datacraft::Instruction

Inherits:
Object
  • Object
show all
Defined in:
lib/datacraft/instruction.rb

Overview

Building Instruction

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context = Context.new) ⇒ Instruction

Returns a new instance of Instruction.


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# File 'lib/datacraft/instruction.rb', line 6

def initialize(context = Context.new)
  @context = context
end

Instance Attribute Details

#context ⇒ Object (readonly)

Returns the value of attribute context.


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# File 'lib/datacraft/instruction.rb', line 4

def context
  @context
end

Class Method Details

.check(filename) ⇒ Object 


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# File 'lib/datacraft/instruction.rb', line 41

def self.check(filename)
  begin
    script_content = IO.read(filename)
    instruction = Instruction.new
    instruction.instance_eval(script_content)
    'Looks good.'
  rescue InvalidInstruction => e
    e.message
  end
end

.from_file(filename) ⇒ Object 


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# File 'lib/datacraft/instruction.rb', line 34

def self.from_file(filename)
  script_content = IO.read(filename)
  instruction = Instruction.new
  instruction.instance_eval(script_content)
  instruction
end

Instance Method Details

#from(klass, *initialization_params) ⇒ Object 


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# File 'lib/datacraft/instruction.rb', line 14

def from(klass, *initialization_params)
  @context.providers << { klass: klass, args: initialization_params }
end

#post_build(&block) ⇒ Object 


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# File 'lib/datacraft/instruction.rb', line 26

def post_build(&block)
  @context.post_hooks << { block: block }
end

#pre_build(&block) ⇒ Object 


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# File 'lib/datacraft/instruction.rb', line 10

def pre_build(&block)
  @context.pre_hooks << { block: block }
end

#set(key, value) ⇒ Object 


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# File 'lib/datacraft/instruction.rb', line 30

def set(key, value)
  @context.options[key.to_sym] = value
end

#to(klass, *initialization_params) ⇒ Object 


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# File 'lib/datacraft/instruction.rb', line 22

def to(klass, *initialization_params)
  @context.consumers << { klass: klass, args: initialization_params }
end

#tweak(klass = nil, *initialization_params, &block) ⇒ Object 


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# File 'lib/datacraft/instruction.rb', line 18

def tweak(klass = nil, *initialization_params, &block)
  @context.tweakers << { klass: klass, args: initialization_params, block: block }
end