Module: MultiJson

Extended by:
MultiJson
Includes:
Options
Included in:
MultiJson
Defined in:
lib/multi_json.rb,
lib/multi_json/adapter.rb,
lib/multi_json/options.rb,
lib/multi_json/version.rb,
lib/multi_json/load_error.rb,
lib/multi_json/adapters/oj.rb,
lib/multi_json/adapters/gson.rb,
lib/multi_json/adapters/yajl.rb,
lib/multi_json/vendor/okjson.rb,
lib/multi_json/adapters/ok_json.rb,
lib/multi_json/adapters/json_gem.rb,
lib/multi_json/adapters/json_pure.rb,
lib/multi_json/adapters/jr_jackson.rb,
lib/multi_json/adapters/json_common.rb,
lib/multi_json/convertible_hash_keys.rb,
lib/multi_json/adapters/nsjsonserialization.rb

Defined Under Namespace

Modules: Adapters, ConvertibleHashKeys, OkJson, Options Classes: Adapter, LoadError, Version

Constant Summary collapse

ALIASES =
{ 'jrjackson' => :jr_jackson }
REQUIREMENT_MAP =
[
  ['oj',           :oj],
  ['yajl',         :yajl],
  ['jrjackson',    :jr_jackson],
  ['json/ext',     :json_gem],
  ['gson',         :gson],
  ['json/pure',    :json_pure]
]
VERSION =
Version.to_s.freeze
DecodeError =

Legacy support

LoadError

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Options

#default_dump_options, #default_load_options, #dump_options, #dump_options=, #load_options, #load_options=

Class Method Details

.cached_optionsObject


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# File 'lib/multi_json.rb', line 10

def cached_options
  @cached_options ||= {}
end

.reset_cached_options!Object


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# File 'lib/multi_json.rb', line 14

def reset_cached_options!
  @cached_options = {}
end

Instance Method Details

#adapterObject Also known as: engine

Get the current adapter class.


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# File 'lib/multi_json.rb', line 70

def adapter
  return @adapter if defined?(@adapter) && @adapter

  self.use nil # load default adapter

  @adapter
end

#current_adapter(options = {}) ⇒ Object


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# File 'lib/multi_json.rb', line 127

def current_adapter(options={})
  if new_adapter = options[:adapter]
    load_adapter(new_adapter)
  else
    adapter
  end
end

#default_adapterObject Also known as: default_engine

The default adapter based on what you currently have loaded and installed. First checks to see if any adapters are already loaded, then checks to see which are installed if none are loaded.


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# File 'lib/multi_json.rb', line 46

def default_adapter
  return :oj if defined?(::Oj)
  return :yajl if defined?(::Yajl)
  return :jr_jackson if defined?(::JrJackson)
  return :json_gem if defined?(::JSON::JSON_LOADED)
  return :gson if defined?(::Gson)

  REQUIREMENT_MAP.each do |library, adapter|
    begin
      require library
      return adapter
    rescue ::LoadError
      next
    end
  end

  Kernel.warn '[WARNING] MultiJson is using the default adapter (ok_json).' +
    'We recommend loading a different JSON library to improve performance.'

  :ok_json
end

#default_options=(value) ⇒ Object


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# File 'lib/multi_json.rb', line 24

def default_options=(value)
  Kernel.warn "MultiJson.default_options setter is deprecated\n" +
    "Use MultiJson.load_options and MultiJson.dump_options instead"

  self.load_options = self.dump_options = value
end

#dump(object, options = {}) ⇒ Object Also known as: encode

Encodes a Ruby object as JSON.


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# File 'lib/multi_json.rb', line 136

def dump(object, options={})
  current_adapter(options).dump(object, options)
end

#load(string, options = {}) ⇒ Object Also known as: decode

Decode a JSON string into Ruby.

Options

:symbolize_keys :: If true, will use symbols instead of strings for the keys. :adapter :: If set, the selected adapter will be used for this call.


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# File 'lib/multi_json.rb', line 117

def load(string, options={})
  adapter = current_adapter(options)
  begin
    adapter.load(string, options)
  rescue adapter::ParseError => exception
    raise LoadError.new(exception.message, exception.backtrace, string)
  end
end

#load_adapter(new_adapter) ⇒ Object


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# File 'lib/multi_json.rb', line 96

def load_adapter(new_adapter)
  case new_adapter
  when String, Symbol
    load_adapter_from_string_name new_adapter.to_s
  when NilClass, FalseClass
    load_adapter default_adapter
  when Class, Module
    new_adapter
  else
    raise ::LoadError
  end
rescue ::LoadError
  raise ArgumentError, 'Did not recognize your adapter specification.'
end

#use(new_adapter) ⇒ Object Also known as: adapter=, engine=

Set the JSON parser utilizing a symbol, string, or class. Supported by default are:

  • :oj
  • :json_gem
  • :json_pure
  • :ok_json
  • :yajl
  • :nsjsonserialization (MacRuby only)
  • :gson (JRuby only)
  • :jr_jackson (JRuby only)

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# File 'lib/multi_json.rb', line 90

def use(new_adapter)
  @adapter = load_adapter(new_adapter)
end

#with_adapter(new_adapter) ⇒ Object Also known as: with_engine

Executes passed block using specified adapter.


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# File 'lib/multi_json.rb', line 142

def with_adapter(new_adapter)
  old_adapter, self.adapter = adapter, new_adapter
  yield
ensure
  self.adapter = old_adapter
end