module Roger::Helpers::GetCallable
Helper to include the get_callbable method
Public Instance Methods
get_callable(callable, map)
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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
# File lib/roger/helpers/get_callable.rb, line 11 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