// CSE 373, Winter 2013, Marty Stepp
// This program shows demonstrates the Guava collection library
// using a set of data related to US presidents.
//
// We use Multimap to map from first names to presidents with that name;
// BiMap to map from presidents to their vice-presidents and back;
// and Table to map from a president/VP combination to the year they were inaugurated.
//
// To compile/run this program you must download and link the Guava JAR to your project.

import java.io.*;
import java.util.*;
import com.google.common.collect.*;

public class Lecture05Guava {
	public static void main(String[] args) throws FileNotFoundException {
		// (first name -> [presidents with that first name])
		Multimap<String, String> mmap = 
				HashMultimap.create();
		// (prez <-> vp)
		BiMap<String, String> bmap = HashBiMap.create();
		
		// (prez, vp -> year)
		Table<String, String, Integer> table =
				TreeBasedTable.create();
		
		// each line of input is of the following format:
		// Bill Clinton:D:1993:2001:Al Gore
		Scanner input = new Scanner(new File("prez.txt"));
		while (input.hasNextLine()) {
			Scanner tokens = new Scanner(input.nextLine());
			tokens.useDelimiter(":");
			String prez = tokens.next();
			String[] parts = prez.split(" ");
			String firstName = parts[0];
			
			String party = tokens.next();
			int startYear = tokens.nextInt();
			int endYear = tokens.nextInt();
			String vp = tokens.next();
			
			// put the data into various Guava collections
			mmap.put(firstName, prez);
			if (!vp.equals("No VP")) {
				bmap.put(prez, vp);
			}
			table.put(prez, vp, startYear);
		}
		
		// print a few things at the end to demonstrate the collections
		System.out.println(mmap.get("William"));
		System.out.println(bmap);
		System.out.println(bmap.get("Bill Clinton"));
		System.out.println(bmap.inverse().get("Adlai Stevenson"));
		System.out.println(table.get("George Bush", "Dan Quayle"));
	}
}