1 /*
2 * Copyright 1999-2001,2004 The Apache Software Foundation.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
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.commons.workflow;
18
19
20 /**
21 * <p>An <strong>Iterator</strong> is a <code>Block</code> that conditionally
22 * repeats the nested Steps associated with the Block more than once (such as
23 * a Block that implements "while" or "for" functionality). This is a tagging
24 * interface only - it is useful to help Steps that implement "break" or
25 * "continue" type processing to detect whether they have been invoked
26 * correctly (nested inside an Iterator) or not.</p>
27 *
28 * @version $Revision: 155475 $ $Date: 2005-02-26 13:31:11 +0000 (Sat, 26 Feb 2005) $
29 * @author Craig R. McClanahan
30 */
31
32 public interface Iterator extends Block {
33
34
35 // No extra functionality is defined
36
37
38 }