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|
module Jsonify
# Provides a set of functions for creating JsonValues from Ruby objects.
module Generate
class << self
# Coerces the given value into a JsonValue (or subclass), String, or Number.
#
# The coercion rules are based on the type (class) of the value as follows:
# - +JsonValue+ => no coercion
# - +String+ => no coercion
# - +Numeric+ => no coercion
# - +TrueClass+ => JsonTrue ( true )
# - +FalseClass+=> JsonFalse ( false )
# - +NilClass+ => JsonNull ( null )
# - +Array+ => JsonArray ( [1,2,3] )
# - +Hash+ => JsonObject ( <code>{"\a":1,\"b\":2}</code> )
# - +else+ => #to_s
#
# @param val value to coerce into a JsonValue.
def value(val)
case val
when JsonValue, String, Numeric; val
when TrueClass; @json_true ||= JsonTrue.new
when FalseClass; @json_false ||= JsonFalse.new
when NilClass; @json_null ||= JsonNull.new
when Array; array_value val
when Hash; object_value val
else val.to_s
end
end
def pair_value(key,val=nil)
JsonPair.new(key,value(val))
end
def object_value(hash)
json_object = JsonObject.new
hash.each { |key,val| json_object.add( pair_value(key, val) ) }
json_object
end
def array_value(vals)
JsonArray.new(Array(vals).map{ |v| value v })
end
end
end
end
|
