1 /*
2 * $Id: IterateTei.java 471754 2006-11-06 14:55:09Z husted $
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21 package org.apache.struts.taglib.logic;
22
23 import javax.servlet.jsp.tagext.TagData;
24 import javax.servlet.jsp.tagext.TagExtraInfo;
25 import javax.servlet.jsp.tagext.VariableInfo;
26
27 /**
28 * Implementation of <code>TagExtraInfo</code> for the <b>iterate</b> tag,
29 * identifying the scripting object(s) to be made visible.
30 *
31 * @version $Rev: 471754 $ $Date: 2004-10-16 12:38:42 -0400 (Sat, 16 Oct 2004)
32 * $
33 */
34 public class IterateTei extends TagExtraInfo {
35 /**
36 * Return information about the scripting variables to be created.
37 */
38 public VariableInfo[] getVariableInfo(TagData data) {
39 // prime this array with the maximum potential variables.
40 // will be arraycopy'd out to the final array based on results.
41 VariableInfo[] variables = new VariableInfo[2];
42
43 // counter for matched results.
44 int counter = 0;
45
46 /* id : object of the current iteration */
47 String id = data.getAttributeString("id");
48 String type = data.getAttributeString("type");
49
50 if (id != null) {
51 if (type == null) {
52 type = "java.lang.Object";
53 }
54
55 variables[counter++] =
56 new VariableInfo(data.getAttributeString("id"), type, true,
57 VariableInfo.NESTED);
58 }
59
60 /* indexId : number value of the current iteration */
61 String indexId = data.getAttributeString("indexId");
62
63 if (indexId != null) {
64 variables[counter++] =
65 new VariableInfo(indexId, "java.lang.Integer", true,
66 VariableInfo.NESTED);
67 }
68
69 /* create returning array, and copy results */
70 VariableInfo[] result;
71
72 if (counter > 0) {
73 result = new VariableInfo[counter];
74 System.arraycopy(variables, 0, result, 0, counter);
75 } else {
76 result = new VariableInfo[0];
77 }
78
79 return result;
80 }
81 }