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package cgeo.geocaching.utils;
import org.apache.commons.collections4.iterators.IteratorIterable;
import org.apache.commons.lang3.NotImplementedException;
import java.util.Iterator;
import java.util.List;
final public class MiscUtils {
private MiscUtils() {} // Do not instantiate
public static <T> Iterable<List<T>> buffer(final List<T> original, final int n) {
if (n <= 0) {
throw new IllegalArgumentException("buffer size must be positive");
}
return new IteratorIterable<List<T>>(new Iterator<List<T>>() {
final int size = original.size();
int next = 0;
@Override
public boolean hasNext() {
return next < size;
}
@Override
public List<T> next() {
final List<T> result = original.subList(next, Math.min(next + n, size));
next += n;
return result;
}
@Override
public void remove() {
throw new NotImplementedException("remove");
}
});
}
}
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