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Versions: 14
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Contents
class RakeCommander
module Base
# This class allows to use both method calls to `raise` by using additional parameters.
# @note Although not clearly explained, this is somehow captured here https://stackoverflow.com/a/32481520/4352306
class CustomError < StandardError
def initialize(value = nil)
super(@message = to_message(value)) if @value = value
end
# If @value was already set, ignore the latest message and
# just return @message
def to_s
return @message if @message
unclassed(super)
end
# If @value was already set, ignore the latest message
# just return @message
def message
return @message if @message
to_message(unclassed(super))
end
protected
# Any **children classes** that want to extend how `value` is transformed
# into a `message` **should extend this method**.
# @return [String] `message`
def to_message(value)
case value
when StandardError
to_message(value.message)
when String
value
when NilClass
value
else
raise ArgumentError, "Expecting String, StandardError or NilClass. Given: #{value.class}"
end
end
private
# When `value` is `nil` **methods** `to_s` and `message` return the error class of `self`.
# This helper allows to remove that part to know if the error was raised with `nil`
# @return [String]
def unclassed(str)
str.to_s.gsub(self.class.to_s, '').strip
end
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems