Class: SknUtils::NestedResult

Inherits:
Object
  • Object
show all
Defined in:
lib/skn_utils/nested_result.rb

Direct Known Subclasses

SknHash, PageControls, ResultBean, SknConfiguration

Instance Method Summary collapse

Constructor Details

#initialize(params = {}) ⇒ NestedResult

Returns a new instance of NestedResult.



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# File 'lib/skn_utils/nested_result.rb', line 96

def initialize(params={})
  reset_from_empty!(params)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object (private)

Feature: post-assign key/value pair, <attr>?? predicate, create getter/setter on first access



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# File 'lib/skn_utils/nested_result.rb', line 318

def method_missing(method, *args, &block)
  method_sym = key_as_sym(method)
  method_nsym = method_sym.is_a?(Symbol) ? method.to_s[0..-2].to_sym : method


  if method.to_s.end_with?("=")                                    # add new key/value pair, transform value if Hash or Array
    initialize_from_hash({method_nsym => args.first})         # Add Reader/Writer one first need

  elsif container.key?(method_sym)
    container[method_sym]                                         # Add Reader/Writer one first need

  elsif method.to_s.end_with?('?')                                # order of tests is significant,
    attribute?(method_nsym)

  else # TODO: replace following with nil to match OpenStruct behavior when key not found
    e = NoMethodError.new "undefined method `#{method}' for #{self.class.name}", method, args
    e.set_backtrace caller(1)
    raise e

  end
end

Instance Method Details

#==(other) ⇒ Object Also known as: ===

Ruby basic Class methods



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# File 'lib/skn_utils/nested_result.rb', line 140

def ==(other)
  return false unless other.is_a?(NestedResult)
  to_hash.eql?(other.to_hash)
end

#[](attr) ⇒ Object 



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# File 'lib/skn_utils/nested_result.rb', line 100

def [](attr)
  container[key_as_sym(attr)]
end

#[]=(attr, value) ⇒ Object

Feature: if a new attribute is added, on first read method_missing will create getters/setters



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# File 'lib/skn_utils/nested_result.rb', line 105

def []=(attr, value)
  container.store(key_as_sym(attr), value)
end

#delete_field(name) ⇒ Object

protect public methods



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# File 'lib/skn_utils/nested_result.rb', line 109

def delete_field(name)      # protect public methods
  sym = key_as_sym(name)
  unless !sym.is_a?(Symbol) || self.class.method_defined?(sym)
    singleton_class.send(:remove_method, "#{sym.to_s}=".to_sym, sym) rescue nil
    container.delete(sym)
  end
end

#encode_with(coder) ⇒ Object

YAML/Psych load support, chance to re-initialize value methods

Use our unwrapped/original input Hash when yaml’ing



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# File 'lib/skn_utils/nested_result.rb', line 164

def encode_with(coder)
  coder['container'] = attributes
end

#eql?(other) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/skn_utils/nested_result.rb', line 146

def eql?(other)
  return false unless other.is_a?(NestedResult)
  to_hash.eql?(other.to_hash)
end

#hash ⇒ Object 



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# File 'lib/skn_utils/nested_result.rb', line 151

def hash
  to_hash.hash
end

#hash_from(sym) ⇒ Object

returns hash from any root key starting point: object.root_key

  • protected to reasonably ensure key is a symbol



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# File 'lib/skn_utils/nested_result.rb', line 178

def hash_from(sym)
  starting_sym = key_as_sym(sym)
  bundle = ((starting_sym == container) ? container : { starting_sym => container[starting_sym] })
  bundle.keys.each_with_object({}) do |attr,collector|
    value = bundle[attr]
    case value
      when NestedResult
        value = value.to_hash
      when Array
        value = value.map {|ele| array_to_hash(ele) }
    end
    collector[attr] = value                                                          # new copy
  end
end

#init_with(coder) ⇒ Object

Use our hash from above to fully re-initialize this instance



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# File 'lib/skn_utils/nested_result.rb', line 169

def init_with(coder)
  case coder.tag
    when '!ruby/object:SknUtils::NestedResult', "!ruby/object:#{self.class.name}"
      reset_from_empty!( coder.map['container'] )
  end
end

#keys ⇒ Object

Feature: returns keys from root input Hash



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# File 'lib/skn_utils/nested_result.rb', line 156

def keys
  container.keys
end

#to_hash ⇒ Object Also known as: to_h

Exporters



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# File 'lib/skn_utils/nested_result.rb', line 120

def to_hash
  attributes
end

#to_json(*args) ⇒ Object 



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# File 'lib/skn_utils/nested_result.rb', line 126

def to_json(*args)
  attributes.to_json(*args)
end

#to_s ⇒ Object

Returns a string containing a detailed summary of the keys and values.



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# File 'lib/skn_utils/nested_result.rb', line 133

def to_s
  attributes.to_s
end