Class: MIME::Types::Container

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/mime/types/container.rb

Overview

MIME::Types requires a serializable keyed container that returns an empty Set on a key miss. Hash#default_value cannot be used because, while it traverses the Marshal format correctly, it will not survive any other serialization format (plus, a default of a mutable object resuls in a shared mess). Hash#default_proc cannot be used without a wrapper because it prevents Marshal serialization (and does not survive the round-trip).

Instance Method Summary collapse

Constructor Details

#initialize(hash = {}) ⇒ Container

Returns a new instance of Container.



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# File 'lib/mime/types/container.rb', line 15

def initialize(hash = {})
  @container = {}
  merge!(hash)
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/mime/types/container.rb', line 20

def [](key)
  container[key] || EMPTY_SET
end

#[]=(key, value) ⇒ Object 



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# File 'lib/mime/types/container.rb', line 24

def []=(key, value)
  container[key] =
    case value
    when Set
      value
    else
      Set[*value]
    end
end

#add(key, value) ⇒ Object 



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# File 'lib/mime/types/container.rb', line 61

def add(key, value)
  (container[key] ||= Set.new).add(value)
end

#encode_with(coder) ⇒ Object 



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# File 'lib/mime/types/container.rb', line 73

def encode_with(coder)
  container.each { |k, v| coder[k] = v.to_a }
end

#init_with(coder) ⇒ Object 



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# File 'lib/mime/types/container.rb', line 77

def init_with(coder)
  @container = {}
  coder.map.each { |k, v| container[k] = Set[*v] }
end

#marshal_dump ⇒ Object 



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# File 'lib/mime/types/container.rb', line 65

def marshal_dump
  {}.merge(container)
end

#marshal_load(hash) ⇒ Object 



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# File 'lib/mime/types/container.rb', line 69

def marshal_load(hash)
  @container = hash
end

#merge(other) ⇒ Object 



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# File 'lib/mime/types/container.rb', line 34

def merge(other)
  self.class.new(other)
end

#merge!(other) ⇒ Object 



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# File 'lib/mime/types/container.rb', line 38

def merge!(other)
  tap {
    other = other.is_a?(MIME::Types::Container) ? other.container : other
    container.merge!(other)
    normalize
  }
end

#to_hash ⇒ Object 



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# File 'lib/mime/types/container.rb', line 46

def to_hash
  container
end