Class: Bound::StaticBoundClass

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

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.define_attributes(*attributes) ⇒ Object 



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# File 'lib/bound.rb', line 154

def self.define_attributes(*attributes)
  if attributes.last.kind_of? Hash
    nested_attributes = attributes.pop
  else
    nested_attributes = {}
  end

  if nested_attributes.keys.any? { |a| !a.kind_of? Symbol }
    message = "Invalid list of attributes: #{nested_attributes.inspect}"
    raise ArgumentError, message
  end

  if attributes.any? { |a| !a.kind_of? Symbol }
    message = "Invalid list of attributes: #{attributes.inspect}"
    raise ArgumentError, message
  end

  nested_attributes.each do |attribute, nested_class|
    define_nested_delegate attribute, nested_class
    define_equality attribute
  end

  attributes.each do |attribute|
    define_delegate attribute
    define_equality attribute
  end
end

.define_delegate(attr, prefix = '') ⇒ Object 



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# File 'lib/bound.rb', line 240

def self.define_delegate(attr, prefix = '')
  code = <<-EOR
    def #{prefix}#{attr}
      if @o && @o.key?(:#{attr})
        @o[:#{attr}]
      elsif @t
        if @t.kind_of?(Hash)
          @t[:#{attr}]
        elsif @t.respond_to?(:#{attr})
          @t.#{attr}
        end
      end
    end
  EOR
  class_eval code
end

.define_equality(attr) ⇒ Object 



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# File 'lib/bound.rb', line 224

def self.define_equality(attr)
  @equality ||= []
  @equality << attr
  undef_method :==
  code = <<-EOR
    def ==(other)
      return false unless other
      #{@equality.inspect}.all? do |attr|
        other.respond_to?(attr) &&
          other.send(attr) == send(attr)
      end
    end
  EOR
  class_eval code
end

.define_initializer(after_init = 'validate!') ⇒ Object 



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# File 'lib/bound.rb', line 143

def self.define_initializer(after_init = 'validate!')
  code = <<-EOR
    def initialize(target = nil, overwrite = nil)
      @t, @o = target, overwrite
      %s
    end
  EOR

  class_eval code % after_init
end

.define_initializer_without_validation ⇒ Object 



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# File 'lib/bound.rb', line 139

def self.define_initializer_without_validation
  define_initializer(nil)
end

.define_nested_delegate(attr, nested_class) ⇒ Object 



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# File 'lib/bound.rb', line 257

def self.define_nested_delegate(attr, nested_class)
  define_delegate attr, 'get_'
  code = <<-EOR
    class << self
      def get_#{attr}_class
        @#{attr}_class
      end
      def set_#{attr}_class(arg)
        @#{attr}_class = arg
      end
      private :set_#{attr}_class
    end
  EOR

  if nested_class.kind_of? Array
    nested_class = nested_class.first
    code += <<-EOR
      def #{attr}
        return @#{attr} if defined? @#{attr}
        return [] unless val = get_#{attr}
        @#{attr} ||= val.map{|t| self.class.get_#{attr}_class.new t}
      end
      private :get_#{attr}
    EOR
  else
    code += <<-EOR
      def #{attr}
        return @#{attr} if defined? @#{attr}
        return nil unless val = get_#{attr}
        @#{attr} ||= self.class.get_#{attr}_class.new(val)
      end
      private :get_#{attr}
    EOR
  end
  class_eval code
  self.send :"set_#{attr}_class", nested_class
end

.define_validator ⇒ Object 



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# File 'lib/bound.rb', line 182

def self.define_validator
  attributes = symbolize_attributes(@attributes ||= [])
  optional_attributes = symbolize_attributes(@optional_attributes ||= [])
  nested_array_attributes = symbolize_attributes(@nested_array_attributes ||= [])

  undef_method :validate!

  code = <<-EOR
    def validate!
      v = Bound::BoundValidator.new(self, @t, @o)
      v.attributes = [#{attributes}]
      v.optional_attributes = [#{optional_attributes}]
      v.nested_array_attributes = [#{nested_array_attributes}]
      v.validate!
    end
    private :validate!
  EOR
  class_eval code
end

.optional(*attributes) ⇒ Object 



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# File 'lib/bound.rb', line 299

def self.optional(*attributes)
  set_attributes(:set_optional_attributes, attributes)
end

.required(*attributes) ⇒ Object 



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# File 'lib/bound.rb', line 295

def self.required(*attributes)
  set_attributes(:set_required_attributes, attributes)
end

.set_attributes(type, attributes) ⇒ Object 



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# File 'lib/bound.rb', line 303

def self.set_attributes(type, attributes)
  self.define_attributes(*attributes)

  array_attributes = []
  if attributes.last.kind_of? Hash
    attributes.pop.each do |attr, nested_class|
      array_attributes << attr if nested_class.kind_of? Array
      attributes << attr
    end
  end

  self.send(type, attributes, array_attributes)
  self
end

.set_optional_attributes(attributes, nested_array_attributes) ⇒ Object 



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# File 'lib/bound.rb', line 215

def self.set_optional_attributes(attributes, nested_array_attributes)
  @optional_attributes ||= []
  @optional_attributes.concat attributes
  @optional_attributes.concat nested_array_attributes
  @nested_array_attributes ||= []
  @nested_array_attributes.concat nested_array_attributes
  define_validator
end

.set_required_attributes(attributes, nested_array_attributes) ⇒ Object 



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# File 'lib/bound.rb', line 206

def self.set_required_attributes(attributes, nested_array_attributes)
  @attributes ||= []
  @attributes.concat attributes
  @attributes.concat nested_array_attributes
  @nested_array_attributes ||= []
  @nested_array_attributes.concat nested_array_attributes
  define_validator
end

.symbolize_attributes(attributes) ⇒ Object 



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# File 'lib/bound.rb', line 202

def self.symbolize_attributes(attributes)
  attributes.map { |attr| ":#{attr}" }.join(", ")
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/bound.rb', line 131

def ==(other)
  false unless other
  true
end

#validate! ⇒ Object 



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# File 'lib/bound.rb', line 136

def validate!
end