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Contents
module Avro
module Builder
# This module provides methods for defining attributes that can be
# set via the DSL on various objects.
#
# The methods generated for DSL attributes are combined getter/setters
# of the form:
#
# attribute(value = nil)
#
# When value is provided the attribute is set, and when it is nil the
# current value is returned.
#
# When a DSL attribute is defined, the class also keeps track of the
# attribute names.
module DslAttributes
def self.included(base)
base.extend ClassMethods
end
def has_dsl_attribute?(name)
self.class.dsl_attribute_names.include?(name.to_sym)
end
module ClassMethods
def dsl_attributes(*names)
names.each do |name|
dsl_attribute_names << name
ivar = :"@#{name}"
define_method(name) do |value = nil|
value ? instance_variable_set(ivar, value) : instance_variable_get(ivar)
end
end
end
# If a block is specified then it is used to define the
# combined getter/setter method for the DSL attribute.
def dsl_attribute(name, &block)
if block_given?
dsl_attribute_names << name
define_method(name, &block)
else
dsl_attributes(name)
end
end
def dsl_attribute_names
@dsl_attribute_names ||=
if superclass.respond_to?(:dsl_attribute_names)
superclass.dsl_attribute_names.dup
else
Set.new
end
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems