| MemoryValueMapper.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 *
5 *
6 *
7 * The contents of this file are subject to the terms of the Liferay Enterprise
8 * Subscription License ("License"). You may not use this file except in
9 * compliance with the License. You can obtain a copy of the License by
10 * contacting Liferay, Inc. See the License for the specific language governing
11 * permissions and limitations under the License, including but not limited to
12 * distribution rights of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23 package com.liferay.portal.upgrade.util;
24
25 import com.liferay.portal.upgrade.StagnantRowException;
26
27 import java.util.Iterator;
28 import java.util.LinkedHashMap;
29 import java.util.LinkedHashSet;
30 import java.util.Map;
31 import java.util.Set;
32
33 /**
34 * <a href="MemoryValueMapper.java.html"><b><i>View Source</i></b></a>
35 *
36 * @author Alexander Chow
37 * @author Brian Wing Shun Chan
38 */
39 public class MemoryValueMapper implements ValueMapper {
40
41 public MemoryValueMapper() {
42 this(new LinkedHashSet<Object>());
43 }
44
45 public MemoryValueMapper(Set<Object> exceptions) {
46 _map = new LinkedHashMap<Object, Object>();
47 _exceptions = exceptions;
48 }
49
50 public Object getNewValue(Object oldValue) throws Exception {
51 Object value = _map.get(oldValue);
52
53 if (value == null) {
54 if (_exceptions.contains(oldValue)) {
55 value = oldValue;
56 }
57 else {
58 throw new StagnantRowException(String.valueOf(oldValue));
59 }
60 }
61
62 return value;
63 }
64
65 public void mapValue(Object oldValue, Object newValue) throws Exception {
66 _map.put(oldValue, newValue);
67 }
68
69 public void appendException(Object exception) {
70 _exceptions.add(exception);
71 }
72
73 public Iterator<Object> iterator() throws Exception {
74 return _map.keySet().iterator();
75 }
76
77 public int size() throws Exception {
78 return _map.size();
79 }
80
81 public Map<Object, Object> getMap() {
82 return _map;
83 }
84
85 private Map<Object, Object> _map;
86 private Set<Object> _exceptions;
87
88 }