49 lines
1.1 KiB
Ruby
49 lines
1.1 KiB
Ruby
unless defined?(::JSON::JSON_LOADED) and ::JSON::JSON_LOADED
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require 'json'
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end
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defined?(::Set) or require 'set'
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class Set
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# See #as_json.
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def self.json_create(object)
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new object['a']
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end
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# Methods <tt>Set#as_json</tt> and +Set.json_create+ may be used
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# to serialize and deserialize a \Set object;
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# see Marshal[https://docs.ruby-lang.org/en/master/Marshal.html].
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#
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# \Method <tt>Set#as_json</tt> serializes +self+,
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# returning a 2-element hash representing +self+:
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#
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# require 'json/add/set'
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# x = Set.new(%w/foo bar baz/).as_json
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# # => {"json_class"=>"Set", "a"=>["foo", "bar", "baz"]}
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#
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# \Method +JSON.create+ deserializes such a hash, returning a \Set object:
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#
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# Set.json_create(x) # => #<Set: {"foo", "bar", "baz"}>
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#
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def as_json(*)
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{
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JSON.create_id => self.class.name,
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'a' => to_a,
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}
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end
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# Returns a JSON string representing +self+:
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#
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# require 'json/add/set'
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# puts Set.new(%w/foo bar baz/).to_json
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#
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# Output:
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#
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# {"json_class":"Set","a":["foo","bar","baz"]}
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#
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def to_json(*args)
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as_json.to_json(*args)
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end
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end
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