59.2.1. Abstract Factory

59.2.1. Abstract Factory
	59.2. Creational Design Patterns

Odkazy

AbstractFactory Pattern

Provide an interface for creating families of related or dependent objects without specifying their concrete classes.

Poskytuje/zavádí rozhraní/interface pro tvorbu rodiny souvisejících nebo závislých objektů bez specifikace jejich konkrétních tříd.

Ruby automatically implements

Příklad 59.1. Abstract Factory Pattern

class Foo; end
class Bar; end

# Here is the use of the Abstract Factory pattern
def create_something( factory )
    new_object = factory.new
    puts "created a new #{new_object.type} with a factory"
end

# Here we select a factory to use
create_something( Foo )
create_something( Bar )

Příklad 59.2. Abstract Factory Pattern

def create_something_with_block
    new_object = yield
    puts "created a new #{new_object.type} with a block"
end

def create_something_with_proc( &proc )
    new_object = proc.call
    puts "created a #{new_object.type} with a proc"
end

create_something_with_block { Foo.new }
create_something_with_block { Bar.new }
create_something_with_proc { Foo.new }
create_something_with_proc { Bar.new }


59.2. Creational Design Patterns		59.2.2. Abstract Session Pattern