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.util;
24  
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
28  import com.liferay.portal.kernel.util.Validator;
29  
30  /**
31   * <a href="LayoutCloneFactory.java.html"><b><i>View Source</i></b></a>
32   *
33   * @author Brian Wing Shun Chan
34   */
35  public class LayoutCloneFactory {
36  
37      public static LayoutClone getInstance() {
38          if (_layoutClone == null) {
39              if (Validator.isNotNull(PropsValues.LAYOUT_CLONE_IMPL)) {
40                  if (_log.isDebugEnabled()) {
41                      _log.debug("Instantiate " + PropsValues.LAYOUT_CLONE_IMPL);
42                  }
43  
44                  ClassLoader classLoader =
45                      PortalClassLoaderUtil.getClassLoader();
46  
47                  try {
48                      _layoutClone = (LayoutClone)classLoader.loadClass(
49                          PropsValues.LAYOUT_CLONE_IMPL).newInstance();
50                  }
51                  catch (Exception e) {
52                      _log.error(e, e);
53                  }
54              }
55          }
56          else {
57              if (_log.isDebugEnabled()) {
58                  _log.debug("Return " + _layoutClone.getClass().getName());
59              }
60          }
61  
62          return _layoutClone;
63      }
64  
65      private static Log _log = LogFactoryUtil.getLog(LayoutCloneFactory.class);
66  
67      private static LayoutClone _layoutClone;
68  
69  }