CODEWITHSUNDEEP
spring
EdgeCase
EdgeCase

Reputation: 4827

Spring @Autowire Multiple Objects

I like code to be visually easy to read (subjective, I know). Is there a a way in Spring to take the first form of code

@Autowired
private O1 o1
@Autowired
private O2 o2
@Autowired
private O3 o3

And do something like this:

@Autowired
private O1 o1
private O2 o2
private O3 o3
@Endautowire

I would find the code to be less cluttered. I know I am being trivial and picky, but...

Upvotes: 4

Views: 6824

Answers (5)

David Neuschulz
David Neuschulz

Reputation: 959

I had the same thought as the original poster, but after having read the answers, I completely agree with the consensus that it is better to individually annotate members. I am upvoting the original question because it is a good question in spite of its bad underlying assumption and because it resulted in even better answers.

Upvotes: 1

Chuprin
Chuprin

Reputation: 1137

You can use constructor to inject all objects with one annotation:

private O1 o1;
private O2 o2;
private O3 o3;

@Autowired
public ClassA(O1 o1, O2 o2, O3 o3) {
    this.o1 = o1;
    this.o2 = o2;
    this.o3 = o3;
}

Upvotes: 5

ManuPK
ManuPK

Reputation: 11829

There was times when people use to declare variable like,

int i1, i2, i3;

This is no longer considered as a best practice and declaring each of them separately increases the readability.

Coming to your question, as as mrembisz told it it has to happen, need to happen in source files. Other wise the java compiler should change to handle such a scenario.

Coming to readability, your solution will only increase the code clutter and reduce the readability, suppose I have 10 beans injected, every time I need to see above and below the code to know if it is auto-wired or not.

So, I doubt it worth spend time doing or not.

Upvotes: 2

mrembisz
mrembisz

Reputation: 12870

It is possible only with a preprocessor for java sources. But totally not worth it in my opinion.

Upvotes: 2

sethcall
sethcall

Reputation: 2897

Not how you want with annotations.

You could make a uber type that takes these three, and add that type here. Id only do that if you find yourself in this situation many time, or if it truly reflects a concept in your application.

Upvotes: 0

Related Questions