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Contents
# encoding: UTF-8
#
# A class to model a Java-like Enum.
# To create an Enum extend this class and override :allowed_values method with allowed enum values.
#
# @author:: Nayyara Samuel (mailto: nayyara.samuel@opower.com)
#
module MockServer::Model
# Enum generic class
class Enum
# Create an instance of the enum from the value supplied
# @param supplied_value [Object] value used to create instance of an enum
# @raise [Exception] if the supplied value is not valid for this enum
def initialize(supplied_value)
supplied_value = pre_process_value(supplied_value)
fail "Supplied value: #{supplied_value} is not valid. Allowed values are: #{supplied_value}" unless allowed_values.include?(supplied_value)
@value = supplied_value
end
# @return [Array] a list of values allowed by this enum
def allowed_values
fail 'Override :allowed_values in Enum class'
end
# A pre-process hook for a value before it is stored
# @param value [Object] a value used to instantiate the enum
# @return [Object] the processed value. By default, a no-op implementation.
def pre_process_value(value)
value
end
# Override this for JSON representation
def to_s
@value.to_s
end
end
# Subclass of Enum that has a list of symbols as allowed values.
class SymbolizedEnum < Enum
# Pre-process the value passed in and convert to a symbol
# @param value [Object] a value used to instantiate the enum
# @return [Symbol] a symbolized version of the value passed in (first calls to_s)
def pre_process_value(value)
value.to_s.to_sym
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems