/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
package org.codehaus.groovy.util;

import java.util.Iterator;
import java.util.NoSuchElementException;

/**
 * Allows an int array to be used where an Iterator is expected.
 *
 * @since 3.0.8
 */
public class IntArrayIterator implements Iterator<Integer> {
    private final int[] array;
    private int index;

    /**
     * Creates an iterator that traverses the supplied array in index order.
     *
     * @param array the backing array to iterate
     */
    public IntArrayIterator(final int[] array) {
        this.array = array;
    }

    /** {@inheritDoc} */
    @Override
    public boolean hasNext() {
        return array.length > index;
    }

    /** {@inheritDoc} */
    @Override
    public Integer next() {
        try {
            return array[index++];
        } catch (IndexOutOfBoundsException e) {
            throw new NoSuchElementException(e.getMessage());
        }
    }

    /** {@inheritDoc} */
    @Override
    public void remove() {
        throw new UnsupportedOperationException("Remove not supported for arrays");
    }
}
