1 /*
2 * $Id: AddListAttributeModel.java 1305937 2012-03-27 18:15:15Z nlebas $
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
22 package org.apache.tiles.template;
23
24 import java.io.IOException;
25 import java.util.Deque;
26
27 import org.apache.tiles.ListAttribute;
28 import org.apache.tiles.autotag.core.runtime.ModelBody;
29 import org.apache.tiles.request.Request;
30
31 /**
32 * <p>
33 * <strong>Declare a list that will be pass as an attribute. </strong>
34 * </p>
35 * <p>
36 * Declare a list that will be pass as an attribute . List elements are added
37 * using the tag 'addAttribute' or 'addListAttribute'. This tag can only be used
38 * inside 'insertTemplate', 'insertDefinition' or 'definition' tag.
39 * </p>
40 *
41 * @version $Rev: 1305937 $ $Date: 2012-03-28 05:15:15 +1100 (Wed, 28 Mar 2012) $
42 * @since 2.2.0
43 */
44 public class AddListAttributeModel {
45
46 /**
47 * Executes the model.
48 *
49 * @param role The comma-separated list of roles that can use the list attribute.
50 * @param request The request.
51 * @param modelBody The body.
52 * @throws IOException If the body cannot be evaluated.
53 */
54 public void execute(String role, Request request, ModelBody modelBody) throws IOException {
55 Deque<Object> composeStack = ComposeStackUtil.getComposeStack(request);
56 ListAttribute listAttribute = new ListAttribute();
57 listAttribute.setRole(role);
58 composeStack.push(listAttribute);
59 modelBody.evaluateWithoutWriting();
60 listAttribute = (ListAttribute) composeStack.pop();
61 ListAttribute parent = (ListAttribute) composeStack.peek();
62 parent.add(listAttribute);
63 }
64 }