Class: ConvenientService::Utils::Object::SafeSend

Inherits:
Support::Command show all
Defined in:
lib/convenient_service/utils/object/safe_send.rb

Overview

Note:

‘ArgumentError` is `StandardError` descendant, so it is also rescued. It is up to the client code to ensure that valid arguments are passed.

Returns ‘nil` when `object` does NOT respond to `method`. Otherwise it calls `method` on `object` and returns its value. If calling `method` on `object` raises an exception, it is rescued and `nil` is returned. Only `StandardError` exceptions are rescued. Uses `__send__` under the hood.

See Also:

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Support::Command

[], call

Constructor Details

#initialize(object, method, *args, **kwargs, &block) ⇒ SafeSend

Returns a new instance of SafeSend.

Parameters:



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# File 'lib/convenient_service/utils/object/safe_send.rb', line 62

def initialize(object, method, *args, **kwargs, &block)
  @object = object
  @method = method
  @args = args
  @kwargs = kwargs
  @block = block
end

Instance Attribute Details

#args ⇒ Object (readonly)

Returns the value of attribute args.



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# File 'lib/convenient_service/utils/object/safe_send.rb', line 41

def args
  @args
end

#block ⇒ Object (readonly)

Returns the value of attribute block.



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# File 'lib/convenient_service/utils/object/safe_send.rb', line 53

def block
  @block
end

#kwargs ⇒ Object (readonly)

Returns the value of attribute kwargs.



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# File 'lib/convenient_service/utils/object/safe_send.rb', line 47

def kwargs
  @kwargs
end

#method ⇒ Object (readonly)

Returns the value of attribute method.



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# File 'lib/convenient_service/utils/object/safe_send.rb', line 35

def method
  @method
end

#object ⇒ Object (readonly)

Returns the value of attribute object.



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# File 'lib/convenient_service/utils/object/safe_send.rb', line 29

def object
  @object
end

Instance Method Details

#call ⇒ Object

Returns Can be any type.

Returns:

  • (Object) —

    Can be any type.



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# File 'lib/convenient_service/utils/object/safe_send.rb', line 77

def call
  return unless object.respond_to?(method, true)

  begin
    object.__send__(method, *args, **kwargs, &block)
  rescue
    nil
  end
end