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.documentlibrary.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.InstancePool;
28  import com.liferay.portal.util.PropsValues;
29  
30  /**
31   * <a href="HookFactory.java.html"><b><i>View Source</i></b></a>
32   *
33   * @author Brian Wing Shun Chan
34   */
35  public class HookFactory {
36  
37      public static Hook getInstance() {
38          if (_hook == null) {
39              if (_log.isDebugEnabled()) {
40                  _log.debug("Instantiate " + PropsValues.DL_HOOK_IMPL);
41              }
42  
43              _hook = (Hook)InstancePool.get(PropsValues.DL_HOOK_IMPL);
44          }
45  
46          if (_log.isDebugEnabled()) {
47              _log.debug("Return " + _hook.getClass().getName());
48          }
49  
50          return _hook;
51      }
52  
53      public static void setInstance(Hook hook) {
54          if (_log.isDebugEnabled()) {
55              _log.debug("Set " + hook.getClass().getName());
56          }
57  
58          _hook = hook;
59      }
60  
61      private static Log _log = LogFactoryUtil.getLog(HookFactory.class);
62  
63      private static Hook _hook = null;
64  
65  }