Exception: Dry::Protocol::NotImplemented

Inherits:
StandardError
  • Object
show all
Defined in:
lib/dry/errors/not_implemented.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(type, proto, **details) ⇒ NotImplemented

Returns a new instance of NotImplemented.



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# File 'lib/dry/errors/not_implemented.rb', line 6

def initialize(type, proto, **details)
  @proto, @details = proto, details

  @details[:message] =
    case type
    when :protocol
      "Protocol “#{@proto}” is not implemented for “#{@details[:receiver].class}”."
    when :method
      "Protocol “#{@proto}” does not declare method “#{@details[:method]}”."
    when :nested
      "Protocol “#{@proto}” failed to invoke the implementation for\n" \
      " ⮩    “#{@details[:receiver].class}##{@details[:method]}”.\n" \
      " ⮩  Caused by “#{cause.class}” with a message\n" \
      " ⮩    “#{cause.message}”\n" \
      " ⮩  Rescue this exception and inspect `NotImplemented#cause' for details."
    when :arity
      "Attempt to implement “#{@proto}#@details[:method]}”\n" \
      " ⮩    with a wrong arity for “#{@details[:target]}”.\n" \
      " ⮩  Expected parameters types:\n" \
      " ⮩    “#{@details[:expected]}”\n" \
      " ⮩  Provided parameters types:\n" \
      " ⮩    “#{@details[:provided]}”\n" \
      " ⮩  Please consider providing a proper implementation."
    else
      "Protocol “#{proto}” is invalid."
    end

  super(@details[:message])

  if @details[:cause]
    set_backtrace(
      @details[:cause].backtrace.reject do |line| # FIXME drop_while ??
        line =~ %r[dry-behaviour/lib/dry/behaviour]
      end
    )
  end
end

Instance Attribute Details

#details ⇒ Object (readonly)

Returns the value of attribute details.



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# File 'lib/dry/errors/not_implemented.rb', line 4

def details
  @details
end

#proto ⇒ Object (readonly)

Returns the value of attribute proto.



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# File 'lib/dry/errors/not_implemented.rb', line 4

def proto
  @proto
end

Instance Method Details

#cause ⇒ Object 



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# File 'lib/dry/errors/not_implemented.rb', line 44

def cause
  @details[:cause] ||= super
end