Class: IocRb::BeanFactory

Inherits:
Object show all
Defined in:
lib/ioc_rb/bean_factory.rb

Overview

Instantiates beans according to their scopes

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(const_loader, beans_metadata_storage) ⇒ BeanFactory

Constructor

Parameters:



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# File 'lib/ioc_rb/bean_factory.rb', line 12

def initialize(const_loader, beans_metadata_storage)
  @const_loader           = const_loader
  @beans_metadata_storage = beans_metadata_storage
  @singleton_scope        = IocRb::Scopes::SingletonScope.new(self)
  @prototype_scope        = IocRb::Scopes::PrototypeScope.new(self)
  @request_scope          = IocRb::Scopes::RequestScope.new(self)
end

Instance Attribute Details

#const_loader ⇒ Object (readonly)

Returns the value of attribute const_loader.



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# File 'lib/ioc_rb/bean_factory.rb', line 8

def const_loader
  @const_loader
end

Instance Method Details

#create_bean_and_save(bean_metadata, beans_storage) ⇒ Object

Create new bean instance according to the specified bean_metadata

Parameters:

Returns:

  • bean instance

Raises:

  • MissingBeanError if some of bean dependencies are not found



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# File 'lib/ioc_rb/bean_factory.rb', line 55

def create_bean_and_save(bean_metadata, beans_storage)
  if bean_metadata.bean_class.is_a?(Class)
    bean_class = bean_metadata.bean_class
  else
    bean_class = const_loader.load_const(bean_metadata.bean_class)
    bean_metadata.fetch_attrs!(bean_class)
  end
  bean = bean_metadata.instance ? bean_class.new : bean_class
  if bean_metadata.has_factory_method?
    set_bean_dependencies(bean, bean_metadata)
    bean = bean.send(bean_metadata.factory_method)
    beans_storage[bean_metadata.name] = bean
  else
    # put to container first to prevent circular dependencies
    beans_storage[bean_metadata.name] = bean
    set_bean_dependencies(bean, bean_metadata)
  end

  bean
end

#get_bean(name) ⇒ Object

Get bean from the container by it’s name. According to the bean scope it will be newly created or returned already instantiated bean

Parameters:

  • bean (Symbol) —

    name

Returns:

  • bean instance

Raises:

  • MissingBeanError if bean with the specified name is not found



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# File 'lib/ioc_rb/bean_factory.rb', line 26

def get_bean(name)
  bean_metadata = @beans_metadata_storage.by_name(name)
  unless bean_metadata
    raise IocRb::Errors::MissingBeanError, "Bean with name :#{name} is not defined"
  end
  get_bean_with_metadata(bean_metadata)
end

#get_bean_with_metadata(bean_metadata) ⇒ Object

Get bean by the specified bean metadata

Parameters:

Returns:

  • bean instance



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# File 'lib/ioc_rb/bean_factory.rb', line 37

def get_bean_with_metadata(bean_metadata)
  case bean_metadata.scope
  when :singleton
    @singleton_scope.get_bean(bean_metadata)
  when :prototype
    @prototype_scope.get_bean(bean_metadata)
  when :request
    @request_scope.get_bean(bean_metadata)
  else
    raise IocRb::Errors::UnsupportedScopeError, "Bean with name :#{bean_metadata.name} has unsupported scope :#{bean_metadata.scope}"
  end
end