Class: Remi::SourceToTargetMap

Inherits:
Object
  • Object
show all
Defined in:
lib/remi/source_to_target_map.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source_df, target_df = nil) ⇒ SourceToTargetMap

Returns a new instance of SourceToTargetMap.



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# File 'lib/remi/source_to_target_map.rb', line 3

def initialize(source_df, target_df=nil)
  @source_df = source_df
  @target_df = target_df || @source_df

  reset_map
end

Class Method Details

.apply(source_df, target_df = nil, &block) ⇒ Object 



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# File 'lib/remi/source_to_target_map.rb', line 10

def self.apply(source_df, target_df=nil, &block)
  target_df ||= source_df
  Docile.dsl_eval(SourceToTargetMap.new(source_df, target_df), &block)
end

Instance Method Details

#map(*args) ⇒ Object 



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# File 'lib/remi/source_to_target_map.rb', line 36

def map(*args)
  case
  when @source_fields.include?(nil)
    do_map_generic
  when @source_fields.size == 1 && @transforms.size == 0
    do_map_direct_copy
  when @source_fields.size == 1 && @target_fields.size == 1
    do_map_single_source_and_target_field
  else
    do_map_generic
  end

  reset_map
end

#reset_map ⇒ Object 



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# File 'lib/remi/source_to_target_map.rb', line 30

def reset_map
  @source_fields = []
  @target_fields = []
  @transforms = []
end

#source(*source_fields) ⇒ Object 



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# File 'lib/remi/source_to_target_map.rb', line 15

def source(*source_fields)
  @source_fields = Array(source_fields)
  self
end

#target(*target_fields) ⇒ Object 



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# File 'lib/remi/source_to_target_map.rb', line 25

def target(*target_fields)
  @target_fields = Array(target_fields)
  self
end

#transform(*transforms) ⇒ Object 



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# File 'lib/remi/source_to_target_map.rb', line 20

def transform(*transforms)
  @transforms += Array(transforms)
  self
end