1
00:00:01,640 --> 00:00:07,580
Let's start with the interface that is basically the base of this this pattern, so we can see that

2
00:00:07,940 --> 00:00:12,080
we have this computer interface with a single method to compute.

3
00:00:12,620 --> 00:00:20,630
And the three objects, the three concrete objects that will implement this interface will implement

4
00:00:20,630 --> 00:00:28,220
this method as well, of course, but the implementation will be slightly different for each and every

5
00:00:28,220 --> 00:00:28,430
one.

6
00:00:28,970 --> 00:00:37,820
So for the first one, for the laptop class, we will print laptop computers for phone, phone computers

7
00:00:37,820 --> 00:00:39,140
and for smart TV.

8
00:00:39,140 --> 00:00:44,240
You will have this result in the console alongside.

9
00:00:44,240 --> 00:00:51,380
We have the computer factory, which will have basically get the computer method that will return the

10
00:00:51,390 --> 00:00:53,330
type of computer that we want to create.

11
00:00:53,840 --> 00:01:04,490
So if we apply in this method, a laptop as well as the computer that we want to create, then this

12
00:01:04,700 --> 00:01:12,020
statement will be will be executed and a new chapter will be returned and so on and so forth for the

13
00:01:12,020 --> 00:01:22,340
rest of the objects that we can create in this factory class, in this computer factory class, if we

14
00:01:22,340 --> 00:01:28,340
will supply an unknown parameter, the factory will return.

15
00:01:28,550 --> 00:01:30,070
No, of course you will.

16
00:01:30,440 --> 00:01:31,730
You can change this.

17
00:01:31,730 --> 00:01:32,960
You can change its behavior.

18
00:01:32,960 --> 00:01:34,700
We can put switchgear statements.

19
00:01:34,700 --> 00:01:36,000
You can put whatever you want.

20
00:01:36,000 --> 00:01:37,810
But also you can treat this case as well.

21
00:01:37,820 --> 00:01:42,280
We can have a default computer that you may want to return.

22
00:01:42,440 --> 00:01:50,270
But for the sake of simplicity, let's stick with with this and in this class, do you see the factory

23
00:01:50,270 --> 00:01:51,320
pattern in action?

24
00:01:51,800 --> 00:01:59,810
You need to create first a computer factory, of course, and then we can create this type of object,

25
00:01:59,810 --> 00:02:02,390
but we won't initialize it because it's an interface.

26
00:02:02,900 --> 00:02:10,240
And we can we can invoke the computer factory object to get a letter for us.

27
00:02:10,250 --> 00:02:14,330
And now the computer object will be equal to a laptop.

28
00:02:14,750 --> 00:02:23,930
Then we do the same with different objects, of course, for the rest of the computers here for phone

29
00:02:23,930 --> 00:02:24,770
and smart TV.

30
00:02:25,280 --> 00:02:33,560
So basically you will see in the console laptop computers, phone computers, multiple countries.

31
00:02:33,560 --> 00:02:34,880
But let's see this in action.

32
00:02:34,880 --> 00:02:38,510
Actually, let's let's execute this code.

33
00:02:38,810 --> 00:02:41,820
And you can see we have the expected output here.

34
00:02:42,410 --> 00:02:43,810
So this is how it works.

35
00:02:43,820 --> 00:02:52,700
It's a bit it can be a bit daunting to create a factory pattern because, of course, this is an overly

36
00:02:52,700 --> 00:02:53,840
simplified example.

37
00:02:53,840 --> 00:03:02,330
But if you will have a much more complex structure of objects, then it will be a bit difficult.

38
00:03:02,930 --> 00:03:06,210
And also you will need to think about this from the beginning.

39
00:03:06,230 --> 00:03:11,020
So this is actually a decision that needs to be made before you start coding.

40
00:03:11,930 --> 00:03:13,940
So that's it for the factory.

41
00:03:13,950 --> 00:03:18,490
Better join me in the next iteration where we are going to discuss about Singleton pattern.