Class: Vedeu::Coercers::Position Private

Inherits:
Coercer
  • Object
show all
Defined in:
lib/vedeu/coercers/position.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Provides the mechanism to convert a value into a Geometries::Position.

Instance Attribute Summary

Attributes inherited from Coercer

#attributes, #value

Instance Method Summary collapse

Methods inherited from Coercer

#child_klass, coerce, #coerced?, #incoercible!, #initialize

Methods included from Vedeu::Common

#absent?, #array?, #boolean, #boolean?, #empty_value?, #escape?, #falsy?, #hash?, #line_model?, #numeric?, #positionable?, #present?, #snake_case, #stream_model?, #string?, #symbol?, #truthy?, #view_model?

Constructor Details

This class inherits a constructor from Vedeu::Coercers::Coercer

Instance Method Details

#coerce ⇒ NilClass|Vedeu::Geometries::Position

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

Raises:

  • (Vedeu::Error::Fatal) —

    When Vedeu does not understand that which the client application is attempting to achieve.



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# File 'lib/vedeu/coercers/position.rb', line 16

def coerce
  if value.nil? || coerced?
    value

  elsif tuple?
    klass.new(*value)

  elsif hash?(value)
    klass.new(value.fetch(:y, 1), value.fetch(:x, 1))

  elsif numeric?(value)
    klass.new(value, 1)

  else
    incoercible!

  end
end

#klass ⇒ Class (private)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Class) 


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# File 'lib/vedeu/coercers/position.rb', line 38

def klass
  Vedeu::Geometries::Position
end

#tuple? ⇒ Boolean (private)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

Raises:

  • (Vedeu::Error::Fatal) —

    When Vedeu does not understand that which the client application is attempting to achieve.



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# File 'lib/vedeu/coercers/position.rb', line 44

def tuple?
  return false unless array?(value)
  return true  if value.size == 2

  raise Vedeu::Error::Fatal,
        "A '#{klass}' is made up of two elements. (Provided " \
        "#{value.size}.)"
end