Class: NestedStruct::Coercer

Inherits:
Object
  • Object
show all
Defined in:
lib/nested_struct/coercer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(expression) ⇒ Coercer

Returns a new instance of Coercer.

Raises:



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# File 'lib/nested_struct/coercer.rb', line 5

def initialize(expression)
  if expression.is_a?(Class)
    @type = :single
    @target = expression
  elsif expression.is_a?(Array)
    raise Errors::InvalidCoercerExpression if expression.size != 1
    @type = :multiple
    @target = expression.first
  else
    raise Errors::InvalidCoercerExpression
  end

  raise Errors::InvalidCoercerTarget if !valid_target?
end

Instance Attribute Details

#target ⇒ Object (readonly)

Returns the value of attribute target.



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# File 'lib/nested_struct/coercer.rb', line 3

def target
  @target
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/nested_struct/coercer.rb', line 3

def type
  @type
end

Instance Method Details

#coerce(value) ⇒ Object 



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# File 'lib/nested_struct/coercer.rb', line 20

def coerce(value)
  if multiple?
    raise Errors::InvalidCoercerValue if !value.is_a?(Array)
    value.map { |e| single_coercion(e) }
  else
    single_coercion(value)
  end
end

#multiple? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/nested_struct/coercer.rb', line 29

def multiple?
  type == :multiple
end