What is the best way to retrieve an object within a class?

Question

What is the best way to retrieve an object within a class?

Exploring a Class Structure:

export class LayerEditor {
    public layerManager: LayerManager;
    public commandManager: CommandManager;
    public tools: EditorTools;

    constructor() {
       this.commandManager = new CommandManager();
       this.layerManager = new LayerManager(reonMap);
    }
}


class LayerManager {
      constructor() {}

      selectLayer() {
          // How can we access 'this.commandManager' from here?
      }
}

In the given class structure, there is an editor class with a nested layerManager. Is there a way to reach 'this.commandManager' from inside 'LayerManager.selectLayer()'?

javascript typescript

Answer 1

Answer №1

//CommandManager.ts
export class CommandManager {
    name : string;

    constructor() {
       this.name =" I am a CommandManager";
    }
}

Include CommandManagaer:

import { CommandManager } from "./CommandManager";

export class LayerEditor {
    public layerManager: LayerManager;
    public commandManager: CommandManager;

    constructor() {
       this.commandManager = new CommandManager();
    }
}


export class LayerManager {
      constructor(private layerEditor : LayerEditor) {}

      selectLayer() {
         console.log(this.layerEditor.commandManager.name)
      }
    }

Give it a shot:

 const le = new LayerEditor();
 const lm = new LayerManager(le);
 lm.selectLayer();

You should see the output as I am the manager

Answer 2

//CommandManager.ts
export class CommandManager {
    name : string;

    constructor() {
       this.name =" I am a CommandManager";
    }
}

Include CommandManagaer:

import { CommandManager } from "./CommandManager";

export class LayerEditor {
    public layerManager: LayerManager;
    public commandManager: CommandManager;

    constructor() {
       this.commandManager = new CommandManager();
    }
}


export class LayerManager {
      constructor(private layerEditor : LayerEditor) {}

      selectLayer() {
         console.log(this.layerEditor.commandManager.name)
      }
    }

Give it a shot:

 const le = new LayerEditor();
 const lm = new LayerManager(le);
 lm.selectLayer();

You should see the output as I am the manager

What is the best way to retrieve an object within a class?

Answer №1

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