Call.java

package com.interview.design.questions.callcenter;

/* Represents a call from a user. Calls have a minimum rank and are assigned to the
 * first employee who can handle that call.
 */
public class Call {
	/* Minimal rank of employee who can handle this call. */
	private Rank rank;

	/* Person who is calling. */
	private Caller caller;

	/* Employee who is handling call. */
	private Employee handler;

	public Call(Caller c) {
		rank = Rank.Responder;
		caller = c;
	}

	/* Set employee who is handling call. */
	public void setHandler(Employee e) {
		handler = e;
	}

	/* Play recorded message to the customer. */
	public void reply(String message) {
		System.out.println(message);
	}

	public Rank getRank() {
		return rank;
	}

	public void setRank(Rank r) {
		rank = r;
	}

	public Rank incrementRank() {
		if (rank == Rank.Responder) {
			rank = Rank.Manager;
		} else if (rank == Rank.Manager) {
			rank = Rank.Director;
		}
		return rank;
	}

	/* Disconnect call. */
	public void disconnect() {
		reply("Thank you for calling");
	}
}