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 164

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 248

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

.define_equality(attr) ⇒ Object 



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# File 'lib/bound.rb', line 233

def self.define_equality(attr)
  @equality ||= []
  @equality << attr
  code = <<-EOR
    def==(other)
      return false unless other
      %w{#{@equality.join(' ')}}.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 148

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

  class_eval code
end

.define_initializer_without_validation ⇒ Object 



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# File 'lib/bound.rb', line 144

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 259

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 192

def self.define_validator
  attributes = (@attributes || []).map do |attr|
    ":#{attr.to_s}"
  end.join(',')
  optional_attributes = (@optional_attributes || []).map do |attr|
    ":#{attr.to_s}"
  end.join(',')
  nested_array_attributes = (@nested_array_attributes || []).map do |attr|
    ":#{attr.to_s}"
  end.join(',')
  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 312

def self.optional(*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.set_optional_attributes(attributes, array_attributes)
  self
end

.required(*attributes) ⇒ Object 



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# File 'lib/bound.rb', line 297

def self.required(*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.set_required_attributes(attributes, array_attributes)
  self
end

.set_optional_attributes(attributes, nested_array_attributes) ⇒ Object 



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

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

.set_required_attributes(attributes, nested_array_attributes) ⇒ Object 



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

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

Instance Method Details

#==(other) ⇒ Object 



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

def ==(other)
  false unless other
  true
end

#validate! ⇒ Object 



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# File 'lib/bound.rb', line 141

def validate!
end