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Tuples for Java 8

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package com.aol.cyclops.lambda.tuple.memo;

import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import com.aol.cyclops.lambda.tuple.PTuple2;
import com.aol.cyclops.lambda.tuple.TupleImpl;

public class Memo2  extends TupleImpl{
	 private final Map values = new ConcurrentHashMap<>();
	    private final PTuple2 host;
		public Memo2(PTuple2 host){
			super(Arrays.asList(),2);
			this.host= host;
		}
		
		
		public T1 v1(){
			return ( T1)values.computeIfAbsent(new Integer(0), key -> host.v1());
		}

		public T2 v2(){
			return ( T2)values.computeIfAbsent(new Integer(1), key -> host.v2());
		}


		
		@Override
		public List