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/adapters/oj.rb,
lib/multi_json/parse_error.rb,
lib/multi_json/adapter_error.rb,
lib/multi_json/adapters/gson.rb,
lib/multi_json/adapters/yajl.rb,
lib/multi_json/options_cache.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, OptionsCache Classes: Adapter, AdapterError, ParseError, Version

Constant Summary collapse

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

Legacy support

LoadError = ParseError

Instance Method Summary collapse

Methods included from Options

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

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

  use nil # load default adapter

  @adapter
end

#current_adapter(options = {}) ⇒ Object


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# File 'lib/multi_json.rb', line 129

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 |adapter, library|
    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_optionsObject


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# File 'lib/multi_json.rb', line 18

def default_options
  Kernel.warn "MultiJson.default_options is deprecated\n" \
    'Use MultiJson.load_options or MultiJson.dump_options instead'

  load_options
end

#default_options=(value) ⇒ Object


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# File 'lib/multi_json.rb', line 11

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 138

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 119

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

#load_adapter(new_adapter) ⇒ Object


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# File 'lib/multi_json.rb', line 98

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
    fail ::LoadError, new_adapter
  end
rescue ::LoadError => exception
  raise AdapterError.build(exception)
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)
ensure
  OptionsCache.reset
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 144

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