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# Hack to load json gem first so we can overwrite its to_json.
require 'json'
require 'bigdecimal'
require 'active_support/core_ext/big_decimal/conversions' # for #to_s
require 'active_support/core_ext/hash/except'
require 'active_support/core_ext/hash/slice'
require 'active_support/core_ext/object/instance_variables'
require 'time'
require 'active_support/core_ext/time/conversions'
require 'active_support/core_ext/date_time/conversions'
require 'active_support/core_ext/date/conversions'
# The JSON gem adds a few modules to Ruby core classes containing :to_json definition, overwriting
# their default behavior. That said, we need to define the basic to_json method in all of them,
# otherwise they will always use to_json gem implementation, which is backwards incompatible in
# several cases (for instance, the JSON implementation for Hash does not work) with inheritance
# and consequently classes as ActiveSupport::OrderedHash cannot be serialized to json.
[Object, Array, FalseClass, Float, Hash, Integer, NilClass, String, TrueClass].each do |klass|
klass.class_eval do
# Dumps object in JSON (JavaScript Object Notation). See www.json.org for more info.
def to_json(options = nil)
ActiveSupport::JSON.encode(self, options)
end
end
end
class Object
def as_json(options = nil) #:nodoc:
if respond_to?(:to_hash)
to_hash.as_json(options)
else
instance_values.as_json(options)
end
end
end
class Struct #:nodoc:
def as_json(options = nil)
Hash[members.zip(values)].as_json(options)
end
end
class TrueClass
def as_json(options = nil) #:nodoc:
self
end
def encode_json(encoder) #:nodoc:
to_s
end
end
class FalseClass
def as_json(options = nil) #:nodoc:
self
end
def encode_json(encoder) #:nodoc:
to_s
end
end
class NilClass
def as_json(options = nil) #:nodoc:
self
end
def encode_json(encoder) #:nodoc:
'null'
end
end
class String
def as_json(options = nil) #:nodoc:
self
end
def encode_json(encoder) #:nodoc:
encoder.escape(self)
end
end
class Symbol
def as_json(options = nil) #:nodoc:
to_s
end
end
class Numeric
def as_json(options = nil) #:nodoc:
self
end
def encode_json(encoder) #:nodoc:
to_s
end
end
class Float
# Encoding Infinity or NaN to JSON should return "null". The default returns
# "Infinity" or "NaN" which are not valid JSON.
def as_json(options = nil) #:nodoc:
finite? ? self : nil
end
end
class BigDecimal
# A BigDecimal would be naturally represented as a JSON number. Most libraries,
# however, parse non-integer JSON numbers directly as floats. Clients using
# those libraries would get in general a wrong number and no way to recover
# other than manually inspecting the string with the JSON code itself.
#
# That's why a JSON string is returned. The JSON literal is not numeric, but
# if the other end knows by contract that the data is supposed to be a
# BigDecimal, it still has the chance to post-process the string and get the
# real value.
#
# Use <tt>ActiveSupport.use_standard_json_big_decimal_format = true</tt> to
# override this behavior.
def as_json(options = nil) #:nodoc:
if finite?
ActiveSupport.encode_big_decimal_as_string ? to_s : self
else
nil
end
end
end
class Regexp
def as_json(options = nil) #:nodoc:
to_s
end
end
module Enumerable
def as_json(options = nil) #:nodoc:
to_a.as_json(options)
end
end
class Range
def as_json(options = nil) #:nodoc:
to_s
end
end
class Array
def as_json(options = nil) #:nodoc:
map { |v| v.as_json(options && options.dup) }
end
def encode_json(encoder) #:nodoc:
"[#{map { |v| v.as_json.encode_json(encoder) } * ','}]"
end
end
class Hash
def as_json(options = nil) #:nodoc:
# create a subset of the hash by applying :only or :except
subset = if options
if attrs = options[:only]
slice(*Array(attrs))
elsif attrs = options[:except]
except(*Array(attrs))
else
self
end
else
self
end
Hash[subset.map { |k, v| [k.to_s, v.as_json(options && options.dup)] }]
end
def encode_json(encoder) #:nodoc:
"{#{map { |k,v| "#{k.as_json.encode_json(encoder)}:#{v.as_json.encode_json(encoder)}" } * ','}}"
end
end
class Time
def as_json(options = nil) #:nodoc:
if ActiveSupport.use_standard_json_time_format
xmlschema(3)
else
%(#{strftime("%Y/%m/%d %H:%M:%S")} #{formatted_offset(false)})
end
end
end
class Date
def as_json(options = nil) #:nodoc:
if ActiveSupport.use_standard_json_time_format
strftime("%Y-%m-%d")
else
strftime("%Y/%m/%d")
end
end
end
class DateTime
def as_json(options = nil) #:nodoc:
if ActiveSupport.use_standard_json_time_format
xmlschema(3)
else
strftime('%Y/%m/%d %H:%M:%S %z')
end
end
end
class Process::Status
def as_json(options = nil)
{ :exitstatus => exitstatus, :pid => pid }
end
end
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