Class IntRange

src/main/java/groovy/lang/IntRange.java:58–575

Represents a list of Integer objects starting at and potentially including a specified from value up (or down) to and potentially including a given to value. Instances of this class may be either inclusive aware or non-inclusive aware. See the relevant constructors for creating e

 * changes to this class, you might consider making parallel changes to {@link ObjectRange}.
 */
public class IntRange extends AbstractList<Integer> implements Range<Integer>, Serializable {

    @Serial private static final long serialVersionUID = -7827097587793510780L;

    /**
     * Iterates through each number in an <code>IntRange</code>.
     */
    private class IntRangeIterator implements Iterator<Integer> {
        /**
         * Counts from 0 up to size - 1.
         */
        private int index;

        /**
         * The number of values in the range.
         */
        private int size = size();

        /**
         * The next value to return.
         */
        private int value = isReverse() ? getTo() : getFrom();

        /**
         * {@inheritDoc}
         */
        @Override
        public boolean hasNext() {
            return index < size;
        }

        /**
         * {@inheritDoc}
         */
        @Override
        public Integer next() {
            if (!hasNext()) {
                throw new NoSuchElementException();
            }
            if (index++ > 0) {
                if (isReverse()) {
                    --value;
                } else {
                    ++value;
                }
            }
            return value;
        }

        /**
         * Not supported.
         *
         * @throws java.lang.UnsupportedOperationException always
         */
        @Override
        public void remove() {
            IntRange.this.remove(index);
        }