Class: TypedParams::NamespacedSet

Inherits:
Object
  • Object
show all
Defined in:
lib/typed_params/namespaced_set.rb

Overview

NamespacedSet is a set of key-values that are namespaced by a class. What makes this special is that access supports class inheritance. For example, given a Parent class and a Child class that inherits from Parent, the Child namespace can access the Parent namespace as long as a Child namespace doesn’t also exist, in which case it will take precedence.

For example, the above, codified:

class Parent; end
class Child < Parent; end

s = NamespacedSet.new
s[Parent, :foo] = :bar

s[Parent, :foo] => :bar
s[Child, :foo] => :bar

s[Child, :baz] = :qux

s[Parent, :baz] => nil
s[Child, :baz] => :qux

Direct Known Subclasses

SchemaSet

Instance Method Summary collapse

Constructor Details

#initialize ⇒ NamespacedSet

Returns a new instance of NamespacedSet.



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# File 'lib/typed_params/namespaced_set.rb', line 29

def initialize = @store = {}

Instance Method Details

#[](namespace, key) ⇒ Object 



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# File 'lib/typed_params/namespaced_set.rb', line 35

def [](namespace, key)
  _, data = store.find { |k, _| k == namespace } ||
            store.find { |k, _| namespace <= k }

  return nil if
    data.nil?

  data[key]
end

#[]=(namespace, key, value) ⇒ Object 



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# File 'lib/typed_params/namespaced_set.rb', line 31

def []=(namespace, key, value)
  store.deep_merge!(namespace => { key => value })
end

#exists?(namespace, key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/typed_params/namespaced_set.rb', line 45

def exists?(namespace, key)
  _, data = store.find { |k, _| k == namespace } ||
            store.find { |k, _| namespace <= k }

  return false if
    data.nil?

  data.key?(key)
end