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module MultiJson
class DecodeError < StandardError; end
module_function
@engine = nil
# Get the current engine class.
def engine
return @engine if @engine
self.engine = self.default_engine
@engine
end
REQUIREMENT_MAP = [
["yajl", :yajl],
["json", :json_gem],
["json/pure", :json_pure]
]
# The default engine based on what you currently
# have loaded and installed. First checks to see
# if any engines are already loaded, then checks
# to see which are installed if none are loaded.
def default_engine
:ok_json
end
# Set the JSON parser utilizing a symbol, string, or class.
# Supported by default are:
#
# * <tt>:json_gem</tt>
# * <tt>:json_pure</tt>
# * <tt>:ok_json</tt>
# * <tt>:yajl</tt>
def engine=(new_engine)
case new_engine
when String, Symbol
require "vendor/multi_json/engines/#{new_engine}"
@engine = MultiJson::Engines.const_get("#{new_engine.to_s.split('_').map{|s| s.capitalize}.join('')}")
when Class
@engine = new_engine
else
raise "Did not recognize your engine specification. Please specify either a symbol or a class."
end
end
# Decode a JSON string into Ruby.
#
# <b>Options</b>
#
# <tt>:symbolize_keys</tt> :: If true, will use symbols instead of strings for the keys.
def decode(string, options = {})
engine.decode(string, options)
rescue engine::ParseError => exception
raise DecodeError, exception.message, exception.backtrace
end
# Encodes a Ruby object as JSON.
def encode(object)
engine.encode(object)
end
end
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