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1   /*
2    * $Id: IteratorStatus.java 418521 2006-07-01 23:36:50Z mrdon $
3    *
4    * Copyright 2006 The Apache Software Foundation.
5    *
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    *
10   *      http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.struts2.views.jsp;
19  
20  
21  /***
22   * The iterator tag can export an IteratorStatus object so that
23   * one can get information about the status of the iteration, such as
24   * the size, current index, and whether any more items are available.
25   *
26   */
27  public class IteratorStatus {
28      protected StatusState state;
29  
30      public IteratorStatus(StatusState aState) {
31          state = aState;
32      }
33  
34      public int getCount() {
35          return state.index + 1;
36      }
37  
38      public boolean isEven() {
39          return ((state.index + 1) % 2) == 0;
40      }
41  
42      public boolean isFirst() {
43          return state.index == 0;
44      }
45  
46      public int getIndex() {
47          return state.index;
48      }
49  
50      public boolean isLast() {
51          return state.last;
52      }
53  
54      public boolean isOdd() {
55          return ((state.index + 1) % 2) == 1;
56      }
57  
58      public int modulus(int operand) {
59          return (state.index + 1) % operand;
60      }
61  
62      public static class StatusState {
63          boolean last = false;
64          int index = 0;
65  
66          public void setLast(boolean isLast) {
67              last = isLast;
68          }
69  
70          public void next() {
71              index++;
72          }
73      }
74  }