/*
    GNU GENERAL LICENSE
    Copyright (C) 2006 The Lobo Project. Copyright (C) 2014 - 2017 Lobo Evolution

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    verion 3 of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General License for more details.

    You should have received a copy of the GNU General Public
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
    

    Contact info: lobochief@users.sourceforge.net; ivan.difrancesco@yahoo.it
 */
/*
 * Created on Apr 17, 2005
 */
package org.lobobrowser.util;

import java.util.Iterator;

/**
 * The Class ArrayUtilities.
 *
 * @author J. H. S.
 */
public class ArrayUtilities {
    /**
     * Instantiates a new array utilities.
     */
    private ArrayUtilities() {
        super();
    }
    
    /**
     * Iterator.
     *
     * @param array
     *            the array
     * @param offset
     *            the offset
     * @param length
     *            the length
     * @return the iterator
     */
    public static Iterator iterator(Object[] array, int offset, int length) {
        return new ArrayIterator(array, offset, length);
    }
    
    /**
     * The Class ArrayIterator.
     */
    private static class ArrayIterator implements Iterator {
        /** The array. */
        private final Object[] array;
        /** The top. */
        private final int top;
        /** The offset. */
        private int offset;
        
        /**
         * Instantiates a new array iterator.
         *
         * @param array
         *            the array
         * @param offset
         *            the offset
         * @param length
         *            the length
         */
        public ArrayIterator(Object[] array, int offset, int length) {
            this.array = array;
            this.offset = offset;
            this.top = offset + length;
        }
        
        /*
         * (non-Javadoc)
         * @see java.util.Iterator#hasNext()
         */
        @Override
        public boolean hasNext() {
            return this.offset < this.top;
        }
        
        /*
         * (non-Javadoc)
         * @see java.util.Iterator#next()
         */
        @Override
        public Object next() {
            return this.array[this.offset++];
        }
        
        /*
         * (non-Javadoc)
         * @see java.util.Iterator#remove()
         */
        @Override
        public void remove() {
            throw new UnsupportedOperationException();
        }
    }
}