Pfthb

I'm using angular 7.0.1

In short, I'm interest how to get instance of the service by DI, when providing new value:
providers:[{provide: D3utils, useValue: new D3Utils('selector', StringUtils)], where StringUtils should be provided by DI.

3 classes are playing:

1. 
   D3Utils - constructor(selector, stringUtils)
   


2. StringUtils


3. 
   D3UtilsProvider - constructor(stringUtils). Has method getD3Utils(selector) => new D3Utils(selector, this.stringUtils)
   

Code of the D3Utils and the D3UtilsBuilder

class D3Utils implements ID3Utils 
 constructor(private selector: string, private stringUtils: StringUtils) 

 


export class D3UtilsProvider 
 constructor(private stringUtils: StringUtils) 

 

 public getD3Utils(selector: string) 
 return new D3Utils(selector, this.stringUtils);
 

The problem is that D3Utils needs StringUtils which is provided by DI and one parameter that should be passed manually. I want to write the next:

in first module

providers: [
 provide: D3Utils,
 useValue: D3UtilsProvider.getBuilder('module1')
 ];

in second module

providers: [
 provide: D3Utils,
 useValue: D3UtilsProvider.getBuilder('module2')
 ];

So in line D3UtilsProvider.getBuilder('module2') I need the instance of the D3UtilsProvider, which needs the StringUtils from DI. How to do this?

PS. What workarounds I have found

The first.

 provide: 'd3selector', useValue: '#d3module1'
 provide: 'd3selector', useValue: '#d3module1'

I don't like that it is absolutely not obvious what is d3selector.

The second.

Create two childs inherited from D3Utils: Module1D3Utils and Module2D3Utils, each of them hardcode the selector in their constructors. I don't like use inheritance with DI, because each time you are editing dependencies, you need to go through the all inheritance tree.

The third.

Make getD3Utils static. Not working, because I want to pass StringUtils to D3UtilsProvider with DI.

The fourth

 provide: D3Utils, useValue: new D3Utils('#d3module1', new StringUtils()) 

This is working only for this particular case, because StringUtils currently has no dependencies.