| MemoryValueMapper.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.portal.upgrade.util;
21
22 import com.liferay.portal.upgrade.StagnantRowException;
23
24 import java.util.Iterator;
25 import java.util.LinkedHashMap;
26 import java.util.LinkedHashSet;
27 import java.util.Map;
28 import java.util.Set;
29
30 /**
31 * <a href="MemoryValueMapper.java.html"><b><i>View Source</i></b></a>
32 *
33 * @author Alexander Chow
34 * @author Brian Wing Shun Chan
35 *
36 */
37 public class MemoryValueMapper implements ValueMapper {
38
39 public MemoryValueMapper() {
40 this(new LinkedHashSet<Object>());
41 }
42
43 public MemoryValueMapper(Set<Object> exceptions) {
44 _map = new LinkedHashMap<Object, Object>();
45 _exceptions = exceptions;
46 }
47
48 public Object getNewValue(Object oldValue) throws Exception {
49 Object value = _map.get(oldValue);
50
51 if (value == null) {
52 if (_exceptions.contains(oldValue)) {
53 value = oldValue;
54 }
55 else {
56 throw new StagnantRowException(String.valueOf(oldValue));
57 }
58 }
59
60 return value;
61 }
62
63 public void mapValue(Object oldValue, Object newValue) throws Exception {
64 _map.put(oldValue, newValue);
65 }
66
67 public void appendException(Object exception) {
68 _exceptions.add(exception);
69 }
70
71 public Iterator<Object> iterator() throws Exception {
72 return _map.keySet().iterator();
73 }
74
75 public int size() throws Exception {
76 return _map.size();
77 }
78
79 public Map<Object, Object> getMap() {
80 return _map;
81 }
82
83 private Map<Object, Object> _map;
84 private Set<Object> _exceptions;
85
86 }