Method subList

src/main/java/groovy/lang/ObjectRange.java:362–395

{@inheritDoc}

(int fromIndex, int toIndex)

     * {@inheritDoc}
     */
    @Override
    public List<Comparable> subList(int fromIndex, int toIndex) {
        if (fromIndex < 0) {
            throw new IndexOutOfBoundsException("fromIndex = " + fromIndex);
        }
        if (fromIndex > toIndex) {
            throw new IllegalArgumentException("fromIndex(" + fromIndex + ") > toIndex(" + toIndex + ")");
        }
        if (fromIndex == toIndex) {
            return new EmptyRange<Comparable>(from);
        }

        // Performance detail:
        // not using get(fromIndex), get(toIndex) in the following to avoid stepping over elements twice
        final Iterator<Comparable> iter = new StepIterator(this, 1);

        Comparable toValue = iter.next();
        int i = 0;
        for (; i < fromIndex; i++) {
            if (!iter.hasNext()) {
                throw new IndexOutOfBoundsException("Index: " + i + " is too big for range: " + this);
            }
            toValue = iter.next();
        }
        final Comparable fromValue = toValue;
        for (; i < toIndex - 1; i++) {
            if (!iter.hasNext()) {
                throw new IndexOutOfBoundsException("Index: " + i + " is too big for range: " + this);
            }
            toValue = iter.next();
        }

        return new ObjectRange(fromValue, toValue, reverse);
    }

    /**
     * {@inheritDoc}