1 /*
2 * Copyright (c) 2002-2026 Gargoyle Software Inc.
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 * https://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 package org.htmlunit;
16
17 import java.io.Serializable;
18 import java.util.ArrayList;
19 import java.util.List;
20
21 /**
22 * A simple alert handler that keeps track of alerts in a list.
23 *
24 * @author Mike Bowler
25 * @author Ronald Brill
26 */
27 public class CollectingAlertHandler implements AlertHandler, Serializable {
28
29 private final List<String> collectedAlerts_;
30
31 /**
32 * Creates a new instance, initializing it with an empty list.
33 */
34 public CollectingAlertHandler() {
35 this(new ArrayList<>());
36 }
37
38 /**
39 * Creates an instance with the specified list.
40 *
41 * @param list the list to store alerts in
42 */
43 public CollectingAlertHandler(final List<String> list) {
44 WebAssert.notNull("list", list);
45 collectedAlerts_ = list;
46 }
47
48 /**
49 * Handles the alert. This implementation will store the message in a list
50 * for retrieval later.
51 *
52 * @param page the page that triggered the alert
53 * @param message the message in the alert
54 */
55 @Override
56 public void handleAlert(final Page page, final String message) {
57 collectedAlerts_.add(message);
58 }
59
60 /**
61 * Returns a list containing the message portion of any collected alerts.
62 * @return a list of alert messages
63 */
64 public List<String> getCollectedAlerts() {
65 return collectedAlerts_;
66 }
67
68 /**
69 * Removes all alerts.
70 */
71 public void clear() {
72 collectedAlerts_.clear();
73 }
74 }