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Contents
module Roger
module Helpers
# Helper to include the get_callbable method
module GetCallable
# Makes callable into a object that responds to call.
#
# @param [#call, Symbol, Class] callable If callable already responds to #call will
# just return callable, a Symbol will be searched for in the scope parameter, a class
# will be instantiated (and checked if it will respond to #call)
# @param [Hash] map, Mapping to match symbol to a callable
def get_callable(callable, map)
return callable if callable.respond_to?(:call)
callable = map[callable] if callable.is_a?(Symbol) && map.key?(callable)
callable = callable.new if callable.is_a?(Class)
if callable.respond_to?(:call)
callable
else
error_message = "Could not resolve #{callable.inspect}. Callable must"
error_message << "be an object that responds to #call or a symbol that resolve"
error_message << "to such an object or a class with a #call instance method."
raise ArgumentError, error_message
end
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems