package dk.itu.oop.lecture5;

import java.util.*;
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class IteratorTest {

	public static void print(String s,OOPIterator it){
		System.out.println("--- "+s+" ---");
		// clone the iterator, or it cannot be used afterwards
		OOPIterator printItr = it.cloneMe();
		while ( printItr.hasNext() )
			// all elements upto, but not incl. next() has been printed
			System.out.print(printItr.next().toString()
				+ (printItr.hasNext()? ", " : "") );
		System.out.println();
	}

	public static void main(String[] args){

		String[] names = new String[]{"hans","peter","lise","joakim","olga","lene"};

		OOPIterator nameItr = new ArrayIterator(names);

		print("initial collection", nameItr);
		print("initial collection again", nameItr);

		FilterIterator fi = new FilterIterator(nameItr.cloneMe()){
			public boolean condition(Object o){
				String s = (String)o;
				return s.length()>4;
			}};
		print("filtered elements",fi);

		OddFilter odds = new OddFilter(nameItr.cloneMe());
		print("odd elements", odds);

		EvenFilter evens = new EvenFilter(nameItr.cloneMe());
		print("even elements", evens);

		odds = new OddFilter(nameItr.cloneMe());
		evens = new EvenFilter(nameItr.cloneMe());
		AlternateMerge am = new AlternateMerge(evens,odds);
		print("merged",am);

		odds = new OddFilter(nameItr.cloneMe());
		evens = new EvenFilter(nameItr.cloneMe());
		CompareMerge cm = new CompareMerge(evens,odds);
		print("compare merged",cm);


		print("sorted",new SortingIterator(nameItr.cloneMe()) );

	}
}