Class: Coradoc::Markdown::Serializer::Registry

Inherits:
Object
  • Object
show all
Defined in:
lib/coradoc/markdown/serializer/registry.rb

Overview

Type-keyed dispatch table for element serializers.

Each entry is a tuple of (serializer_instance, priority). Dispatch resolves the highest-priority entry whose declared ‘handles?` predicate accepts the element. This lets specialized serializers (e.g. one that targets a specific CoreModel subclass) override generic ones without modifying the registry lookup logic — Open/Closed.

Defined Under Namespace

Classes: Entry

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Registry

Returns a new instance of Registry.



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# File 'lib/coradoc/markdown/serializer/registry.rb', line 22

def initialize
  @entries = Hash.new { |h, k| h[k] = [] }
end

Instance Method Details

#lookup(element) ⇒ Object 



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# File 'lib/coradoc/markdown/serializer/registry.rb', line 35

def lookup(element)
  each_candidate(element).first&.serializer
end

#lookup!(element) ⇒ Object 



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# File 'lib/coradoc/markdown/serializer/registry.rb', line 39

def lookup!(element)
  lookup(element) || raise(ArgumentError,
                           "Unknown element type for serialization: #{element.class}. " \
                             'Expected a known Markdown model type.')
end

#register(serializer, priority: 0) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/coradoc/markdown/serializer/registry.rb', line 26

def register(serializer, priority: 0)
  klass = serializer.handles_type
  raise ArgumentError, "Serializer #{serializer.class} declares no handles_type" unless klass

  @entries[klass] << Entry.new(serializer, priority)
  @entries[klass].sort!
  serializer
end