rleland     01/03/31 11:51:18

  Added:       src/share/org/apache/struts/util IteratorAdapter.java
  Log:
  Add This adaptor to so IterateTag and Options tag can easily support
  Enumeration when Struts 0.5 library is removed.
  
  Revision  Changes    Path
  1.1                  
jakarta-struts/src/share/org/apache/struts/util/IteratorAdapter.java
  
  Index: IteratorAdapter.java
  ===================================================================
  /*
   * $Header: 
/home/cvs/jakarta-struts/src/share/org/apache/struts/util/IteratorAdapter.java,v 1.1 
2001/03/31 19:51:17 rleland Exp $
   * $Revision: 1.1 $
   * $Date: 2001/03/31 19:51:17 $
   *
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 1999-2001 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Struts", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact [EMAIL PROTECTED]
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.struts.util;
  
  import java.util.Iterator;
  import java.util.NoSuchElementException;
  
  
  /**
   * Utility method for converting Enumeration to an Iterator
   * class.  If you attempt to remove() an Object from the iterator, it will
   * throw an UnsupportedOperationException. Added for use by TagLib so
   * Enumeration can be supported
   *
   * @author Sean Kelly
   * @author Rob Leland
   * @version $Revision: 1.1 $ $Date: 2001/03/31 19:51:17 $
   */
  
  public class IteratorAdapter implements Iterator {
      private java.util.Enumeration enum;
  
      public IteratorAdapter(java.util.Enumeration enum) {
          this.enum = enum;
      }
  
      public boolean hasNext() {
          return enum.hasMoreElements();
     }
  
      public Object next() {
          if (!enum.hasMoreElements()) {
              throw new NoSuchElementException("IteratorAdaptor.next() has no more 
elements");
          }
          return enum.nextElement();
      }
      public void remove() {
          throw new java.lang.UnsupportedOperationException("Method 
IteratorAdaptor.remove() not implemented");
      }
  }
  
  
  

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