Class: Plumb::HashMap::FilteredHashMap

Inherits:
Object
  • Object
show all
Includes:
Steppable
Defined in:
lib/plumb/hash_map.rb

Instance Attribute Summary collapse

Attributes included from Steppable

#name

Instance Method Summary collapse

Methods included from Steppable

#===, #>>, #[], #as_node, #build, #check, #defer, #freeze, included, #inspect, #invalid, #invoke, #match, #meta, #node_name, #not, #pipeline, #policy, #to_s, #transform, #value, wrap, #|

Methods included from Callable

#metadata, #parse, #resolve

Constructor Details

#initialize(key_type, value_type) ⇒ FilteredHashMap

Returns a new instance of FilteredHashMap.



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# File 'lib/plumb/hash_map.rb', line 48

def initialize(key_type, value_type)
  @key_type = key_type
  @value_type = value_type
  freeze
end

Instance Attribute Details

#key_type ⇒ Object (readonly)

Returns the value of attribute key_type.



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# File 'lib/plumb/hash_map.rb', line 46

def key_type
  @key_type
end

#value_type ⇒ Object (readonly)

Returns the value of attribute value_type.



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# File 'lib/plumb/hash_map.rb', line 46

def value_type
  @value_type
end

Instance Method Details

#call(result) ⇒ Object 



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# File 'lib/plumb/hash_map.rb', line 54

def call(result)
  result.invalid(errors: 'must be a Hash') unless result.value.is_a?(::Hash)

  hash = result.value.each.with_object({}) do |(key, value), memo|
    key_r = @key_type.resolve(key)
    value_r = @value_type.resolve(value)
    memo[key_r.value] = value_r.value if key_r.valid? && value_r.valid?
  end

  result.valid(hash)
end