Class: StrongJSON::Type::Object

Inherits:
Object
  • Object
show all
Defined in:
lib/strong_json/type.rb

Instance Method Summary collapse

Constructor Details

#initialize(fields) ⇒ Object

Returns a new instance of Object.



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# File 'lib/strong_json/type.rb', line 81

def initialize(fields)
  @fields = fields
end

Instance Method Details

#coerce(object, path: []) ⇒ Object 



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# File 'lib/strong_json/type.rb', line 85

def coerce(object, path: [])
  unless object.is_a?(Hash)
    raise Error.new(path: path, type: self, value: object)
  end

  result = {}

  all_keys = (@fields.keys + object.keys).sort.uniq
  all_keys.each do |key|
    type = @fields.has_key?(key) ? @fields[key] : NONE
    value = object.has_key?(key) ? object[key] : NONE

    test_value_type(path + [key], type, value) do |v|
      result[key] = v
    end
  end

  result
end

#except(*keys) ⇒ Object 



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# File 'lib/strong_json/type.rb', line 126

def except(*keys)
  Object.new(keys.each.with_object(@fields.dup) do |key, hash|
               hash.delete key
             end)
end

#merge(fields) ⇒ Object 



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# File 'lib/strong_json/type.rb', line 118

def merge(fields)
  if fields.is_a?(Object)
    fields = Object.instance_variable_get("@fields")
  end

  Object.new(@fields.merge(fields))
end

#test_value_type(path, type, value) {|v| ... } ⇒ Object

Yields:

  • (v) 


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# File 'lib/strong_json/type.rb', line 105

def test_value_type(path, type, value)
  if NONE.equal?(type) && !NONE.equal?(value)
    raise UnexpectedFieldError.new(path: path, value: value)
  end

  v = type.coerce(value, path: path)

  return if NONE.equal?(v) || NONE.equal?(type)
  return if type.is_a?(Optional) && v == nil

  yield(v)
end

#to_s ⇒ Object 



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# File 'lib/strong_json/type.rb', line 132

def to_s
  fields = []

  @fields.each do |name, type|
    fields << "#{name}: #{type}"
  end

  "object(#{fields.join(', ')})"
end