| ArticleVersionComparator.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 * The contents of this file are subject to the terms of the Liferay Enterprise
5 * Subscription License ("License"). You may not use this file except in
6 * compliance with the License. You can obtain a copy of the License by
7 * contacting Liferay, Inc. See the License for the specific language governing
8 * permissions and limitations under the License, including but not limited to
9 * distribution rights of the Software.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17 * SOFTWARE.
18 */
19
20 package com.liferay.portlet.journal.util.comparator;
21
22 import com.liferay.portal.kernel.util.OrderByComparator;
23 import com.liferay.portlet.journal.model.JournalArticle;
24
25 /**
26 * <a href="ArticleVersionComparator.java.html"><b><i>View Source</i></b></a>
27 *
28 * @author Brian Wing Shun Chan
29 *
30 */
31 public class ArticleVersionComparator extends OrderByComparator {
32
33 public static String ORDER_BY_ASC = "version ASC";
34
35 public static String ORDER_BY_DESC = "version DESC";
36
37 public static String[] ORDER_BY_FIELDS = {"version"};
38
39 public ArticleVersionComparator() {
40 this(false);
41 }
42
43 public ArticleVersionComparator(boolean asc) {
44 _asc = asc;
45 }
46
47 public int compare(Object obj1, Object obj2) {
48 JournalArticle article1 = (JournalArticle)obj1;
49 JournalArticle article2 = (JournalArticle)obj2;
50
51 int value = 0;
52
53 if (article1.getVersion() < article2.getVersion()) {
54 value = -1;
55 }
56 else if (article1.getVersion() > article2.getVersion()) {
57 value = 1;
58 }
59
60 if (_asc) {
61 return value;
62 }
63 else {
64 return -value;
65 }
66 }
67
68 public String getOrderBy() {
69 if (_asc) {
70 return ORDER_BY_ASC;
71 }
72 else {
73 return ORDER_BY_DESC;
74 }
75 }
76
77 public String[] getOrderByFields() {
78 return ORDER_BY_FIELDS;
79 }
80
81 public boolean isAscending() {
82 return _asc;
83 }
84
85 private boolean _asc;
86
87 }