Java List Create createTuple(List> tuples, List entries, List> lists)

Description

This recursive method is used by the computeCombinations() method.

License

Open Source License

Parameter

Parameter	Description
T	a parameter
tuples	a parameter
entries	a parameter
lists	a parameter

Declaration

static <T> void createTuple(List<List<T>> tuples, List<T> entries, List<Collection<T>> lists) 

Method Source Code

//package com.java2s;
import java.util.ArrayList;
import java.util.Collection;

import java.util.List;

public class Main {
    /**/*from   w w w .  j  a  v a2 s .c o  m*/
     * This recursive method is used by the computeCombinations() method. It
     * recursively adds tuples to the input tuples list as they are formed.
     * 
     * @param <T>
     * @param tuples
     * @param entries
     * @param lists
     */
    static <T> void createTuple(List<List<T>> tuples, List<T> entries, List<Collection<T>> lists) {
        if (entries.size() == lists.size() - 1) {
            for (T t : lists.get(entries.size())) {
                List<T> tuple = new ArrayList<T>(entries);
                tuple.add(t);
                tuples.add(tuple);
            }
        } else {
            for (T t : lists.get(entries.size())) {
                List<T> updatedEntries = new ArrayList<T>(entries);
                updatedEntries.add(t);
                createTuple(tuples, updatedEntries, lists);
            }
        }
    }
}

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