chore: remove ActiveModel dependency

Gemfile.lock

@@ -2,14 +2,11 @@ PATH
   remote: .
   specs:
     xdr (3.0.3)
-      activemodel (>= 4.2, < 8.0)
       activesupport (>= 4.2, < 8.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (7.0.2.2)
-      activesupport (= 7.0.2.2)
     activesupport (7.0.2.2)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)

lib/xdr.rb

@@ -1,5 +1,4 @@
 require "xdr/version"
-require "active_model"
 require "active_support/concern"
 require "active_support/dependencies/autoload"
 require "active_support/core_ext/object/blank"

lib/xdr/dsl/struct.rb

@@ -13,7 +13,5 @@ def attribute(name, type)
     define_method "#{name}=" do |v|
       write_attribute(name, v)
     end
-
-    define_attribute_methods name
   end
 end

lib/xdr/dsl/union.rb

@@ -18,7 +18,6 @@ def attribute(name, type)
     raise ArgumentError, "#{type} does not convert to xdr" unless type.is_a?(XDR::Concerns::ConvertsToXDR)
 
     self.arms = arms.merge(name => type)
-    define_attribute_methods name
   end
 
   private

lib/xdr/struct.rb

@@ -1,20 +1,12 @@
 require "base64"
 
 class XDR::Struct
-  include ActiveModel::Model
-  include ActiveModel::AttributeMethods
-
   extend XDR::Concerns::ConvertsToXDR
   extend XDR::DSL::Struct
 
-  attribute_method_prefix "read_"
-  attribute_method_suffix "write_"
-
   class_attribute :fields
   self.fields = ActiveSupport::OrderedHash.new
 
-  validates_with XDR::StructValidator
-
   attr_reader :attributes
 
   def self.read(io)
@@ -38,7 +30,10 @@ def self.valid?(val)
 
   def initialize(attributes = {})
     @attributes = {}
-    super
+
+    attributes.each do |name, value|
+      write_attribute(name, value)
+    end
   end
 
   #

lib/xdr/union.rb

@@ -1,7 +1,4 @@
 class XDR::Union
-  include ActiveModel::Model
-  include ActiveModel::AttributeMethods
-
   extend XDR::Concerns::ConvertsToXDR
   extend XDR::DSL::Union
 
@@ -17,8 +14,6 @@ class XDR::Union
   self.switch_type = nil
   self.switch_name = nil
 
-  attribute_method_suffix "!"
-
   def self.arm_for_switch(switch)
     begin
       switch = normalize_switch switch
@@ -100,16 +95,24 @@ def value
 
   alias_method :get, :value
 
-  def attribute(attr)
-    return nil unless @arm.to_s == attr
+  def method_missing(method)
+    is_bang = method.end_with?("!")
+    attr = method.to_s.delete_suffix("!")
+
+    super unless self.class.arms.key?(attr.to_sym)
+
+    if @arm.to_s != attr
+      return nil unless is_bang
+      raise XDR::ArmNotSetError, "#{attr} is not the set arm"
+    end
 
     get
   end
 
-  def attribute!(attr)
-    raise XDR::ArmNotSetError, "#{attr} is not the set arm" unless @arm.to_s == attr
+  def respond_to_missing?(method, *)
+    attr = method.to_s.delete_suffix("!")
 
-    get
+    self.class.arms.key?(attr.to_sym) || super
   end
 
   #

spec/lib/xdr/dsl/union_spec.rb

@@ -51,7 +51,7 @@
     expect { klass.new(-1) }.to raise_error(XDR::InvalidSwitchError)
   end
 
-  it "allows bool types", :focus do
+  it "allows bool types" do
     klass = nil
 
     expect do

spec/spec_helper.rb

@@ -5,4 +5,6 @@
 Dir["#{__dir__}/support/**/*.rb"].sort.each { |f| require f }
 
 RSpec.configure do |config|
+  config.filter_run focus: true
+  config.run_all_when_everything_filtered = true
 end

xdr.gemspec

@@ -24,5 +24,4 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = ">= 2.4.0"
 
   spec.add_dependency "activesupport", ">= 4.2", "< 8.0"
-  spec.add_dependency "activemodel", ">= 4.2", "< 8.0"
 end