ListUtil.java

package com.blacklenspub.android.playground;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class ListUtil {

    public static <T> List<T> filter(Iterable<T> source, Predicate<T> predicate) {
        return filterTo(source, new ArrayList<T>(), predicate);
    }

    public static <T, C extends Collection<? super T>> C filterTo(Iterable<T> source, C destination, Predicate<T> predicate) {
        for (T element : source) if (predicate.check(element)) destination.add(element);
        return destination;
    }

}