Class: DataContract::Scatter

Inherits:
Object
  • Object
show all
Includes:
Initializer
Defined in:
lib/data_contract/scatter.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.!(list, receiver, contract_module) ⇒ Object 



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# File 'lib/data_contract/scatter.rb', line 7

def self.!(list, receiver, contract_module)
  assignable_contracts = list.assignable(receiver)
  instance = new list, list.obj, receiver, assignable_contracts, contract_module
  instance.!
end

Instance Method Details

#! ⇒ Object 



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# File 'lib/data_contract/scatter.rb', line 13

def !
  if assignable_contracts.empty?
    raise ContractError, "#{receiver.class.name} cannot be assigned from #{source.class.name} without a shared or compatible contract"
  end

  if contract_module
    @assignable_contracts = specific_contract
  end

  assignable_contracts.each do |contract|
    copy_data contract
  end

  receiver
end

#copy_data(contract) ⇒ Object 



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# File 'lib/data_contract/scatter.rb', line 39

def copy_data(contract)
  contract.setters.each do |setter|
    getter = setter[0...-1]
    val = source.send getter
    receiver.send setter, val
  end
  receiver
end

#specific_contract ⇒ Object 



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# File 'lib/data_contract/scatter.rb', line 29

def specific_contract
  contract = list[contract_module]

  unless assignable_contracts.include? contract
    raise ContractError, "#{receiver.class.name} cannot be assigned from #{contract_module.name} without a shared or compatible contract"
  end

  [contract]
end