01: /*
02: * Copyright 1999-2004 The Apache Software Foundation
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16:
17: package org.apache.tomcat.util.collections;
18:
19: import java.util.Enumeration;
20: import java.util.NoSuchElementException;
21:
22: public class EmptyEnumeration implements Enumeration {
23:
24: static EmptyEnumeration staticInstance = new EmptyEnumeration();
25:
26: public EmptyEnumeration() {
27: }
28:
29: public static Enumeration getEmptyEnumeration() {
30: return staticInstance;
31: }
32:
33: public Object nextElement() {
34: throw new NoSuchElementException("EmptyEnumeration");
35: }
36:
37: public boolean hasMoreElements() {
38: return false;
39: }
40:
41: }
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