How to attach objects with a hinge on collide

I have a ball that is attached to the bottom of a bar with a hinge joint that is swinging back and forth. The hinge joint is on the ball and attaches to the bar. When I tap the screen the hinge joint on the ball is destroyed and depending on the position of the ball will throw it using the built in physics.

I want to collide with another swinging bar and attach to it with a hinge joint. So basically a swinging game for a ball where you swing from bar to bar.

I can destroy the hinge joint just fine. How do I reattach it to the object it has collided with? I have the following:

Attach ball:

 using UnityEngine;
 using System.Collections;

 public class attachBall : MonoBehaviour {

 public GameObject player;

 void OnTriggerEnter2D(Collider2D collider) {
     if (collider.tag == "Player")
     {
         print ("COLLISION DETECTED!");
         player.AddComponent<HingeJoint2D>();
     }
 }

 }

Release ball:

 using UnityEngine;
 using System.Collections;

 public class releaseBall : MonoBehaviour {

 public GameObject player;

 void Update(){

     if (Input.GetMouseButtonDown (0)) {
         Destroy(player.GetComponent("HingeJoint2D"));
     }

 }
 }

I have placed a 2d circle collider on both the ball and the bar it is to collide with. It has a collision but when it does it locks the ball in place. I want it to attach to the bar it has collided with and swing with it.