| AmazonRankingsPreferencesValidator.java |
1 /**
2 * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or modify it under
5 * the terms of the GNU Lesser General Public License as published by the Free
6 * Software Foundation; either version 2.1 of the License, or (at your option)
7 * any later version.
8 *
9 * This library is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12 * details.
13 */
14
15 package com.liferay.portlet.amazonrankings;
16
17 import com.liferay.portlet.amazonrankings.model.AmazonRankings;
18 import com.liferay.portlet.amazonrankings.util.AmazonRankingsUtil;
19
20 import java.util.ArrayList;
21 import java.util.List;
22
23 import javax.portlet.PortletPreferences;
24 import javax.portlet.PreferencesValidator;
25 import javax.portlet.ValidatorException;
26
27 /**
28 * <a href="AmazonRankingsPreferencesValidator.java.html"><b><i>View Source</i>
29 * </b></a>
30 *
31 * @author Brian Wing Shun Chan
32 */
33 public class AmazonRankingsPreferencesValidator
34 implements PreferencesValidator {
35
36 public void validate(PortletPreferences preferences)
37 throws ValidatorException {
38
39 List<String> badIsbns = new ArrayList<String>();
40
41 String[] isbns = preferences.getValues("isbns", new String[0]);
42
43 for (int i = 0; i < isbns.length; i++) {
44 AmazonRankings amazonRankings =
45 AmazonRankingsUtil.getAmazonRankings(isbns[i]);
46
47 if (amazonRankings == null) {
48 badIsbns.add(isbns[i]);
49 }
50 }
51
52 if (badIsbns.size() > 0) {
53 throw new ValidatorException(
54 "Failed to retrieve ISBNs", badIsbns);
55 }
56 }
57
58 }