Source Code : An array iterator

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An array iterator

    


/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

import java.io.Serializable;
import java.util.Iterator;
import java.util.NoSuchElementException;

/**
 * An array iterator.
 * 
 * @version <tt>$Revision: 2800 $</tt>
 * @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
 */
@SuppressWarnings("unchecked")
public class ArrayIterator implements Iterator, Serializable, Cloneable {
  /** The serialVersionUID */
  private static final long serialVersionUID = -6604583440222021075L;

  /** Array to iterate over. */
  protected final Object[] array;

  /** The current position in the array. */
  protected int index;

  /**
   * Construct an ArrayIterator.
   * 
   * @param array
   *          The array to iterate over.
   */
  public ArrayIterator(final Object[] array) {
    this.array = array;
  }

  /**
   * Returns true if there are more elements in the iteration.
   * 
   * @return True if there are more elements in the iteration.
   */
  public boolean hasNext() {
    return index < array.length;
  }

  /**
   * Returns the next element in the iteration.
   * 
   * @return The next element in the iteration.
   * 
   * @throws NoSuchElementException
   *           The are no more elements available.
   */
  public Object next() {
    if (!hasNext())
      throw new NoSuchElementException();

    return array[index++];
  }

  /**
   * Unsupported.
   * 
   * @throws UnsupportedOperationException
   */
  public void remove() {
    throw new UnsupportedOperationException();
  }

  /**
   * Returns a shallow cloned copy of this object.
   * 
   * @return A shallow cloned copy of this object.
   */
  public Object clone() {
    try {
      return super.clone();
    } catch (CloneNotSupportedException e) {
      throw new InternalError();
    }
  }
}

   
    
    
    
  

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