| /* |
| * Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.util; |
| |
| import java.util.Enumeration; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| import java.util.Set; |
| |
| /** |
| * Implements an Enumeration that combines elements from a Set and |
| * an Enumeration. Used by ListResourceBundle and PropertyResourceBundle. |
| */ |
| public class ResourceBundleEnumeration implements Enumeration<String> { |
| |
| Set<String> set; |
| Iterator<String> iterator; |
| Enumeration<String> enumeration; // may remain null |
| |
| /** |
| * Constructs a resource bundle enumeration. |
| * @param set an set providing some elements of the enumeration |
| * @param enumeration an enumeration providing more elements of the enumeration. |
| * enumeration may be null. |
| */ |
| public ResourceBundleEnumeration(Set<String> set, Enumeration<String> enumeration) { |
| this.set = set; |
| this.iterator = set.iterator(); |
| this.enumeration = enumeration; |
| } |
| |
| String next = null; |
| |
| public boolean hasMoreElements() { |
| if (next == null) { |
| if (iterator.hasNext()) { |
| next = iterator.next(); |
| } else if (enumeration != null) { |
| while (next == null && enumeration.hasMoreElements()) { |
| next = enumeration.nextElement(); |
| if (set.contains(next)) { |
| next = null; |
| } |
| } |
| } |
| } |
| return next != null; |
| } |
| |
| public String nextElement() { |
| if (hasMoreElements()) { |
| String result = next; |
| next = null; |
| return result; |
| } else { |
| throw new NoSuchElementException(); |
| } |
| } |
| } |