// A TA object represents one teaching assistant.
// This class implements the Comparable interface so that
// TAs can be ordered and put into a priority queue.

public class TA implements Comparable<TA> {
    private String name;
    private int experience;   // # of quarters served as a TA

	// Returns an integer representing the relative ordering
	// between this object and the given other TA object.
	// < 0  -> i come "before" the other object
	// > 0  -> i come "after" the other object
	//   0  -> i am "equal to" the other object
	public int compareTo(TA otherTA) {
		if (this.experience != otherTA.experience) {
			// if we have a different number of quarters of TAing experience,
			// compare us that way (the "subtraction trick")
			return this.experience - otherTA.experience;
		} else {
			// if we have the same number of quarters of TAing experience,
			// compare us by our names instead (the "delegation trick")
			return this.name.compareTo(otherTA.name);
		}
	}

	// Constructs a new TA with given name and number of quarters' experience.
	// Throws IllegalArgumentException if name is null or experience is negative.
	public TA(String name, int experience) {
		if (name == null || experience < 0) {
			throw new IllegalArgumentException();
		}
		
		this.name = name;
		this.experience = experience;
	}
	
	// Returns the TA's name.
	public String getName() {
		return name;
	}
	
	// Returns the TA's quarters of experience.
	public int getExperience() {
		return experience;
	}

	// Returns string with name and number of quarters, such as "Kim (5q)".
	public String toString() {
		return name + " (" + experience + "q)";
	}
}