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.dao.orm.hibernate;
24  
25  import com.liferay.portal.kernel.dao.orm.DynamicQuery;
26  import com.liferay.portal.kernel.dao.orm.DynamicQueryFactory;
27  import com.liferay.portal.kernel.log.Log;
28  import com.liferay.portal.kernel.log.LogFactoryUtil;
29  
30  import java.util.HashMap;
31  import java.util.Map;
32  
33  import org.hibernate.criterion.DetachedCriteria;
34  
35  /**
36   * <a href="DynamicQueryFactoryImpl.java.html"><b><i>View Source</i></b></a>
37   *
38   * @author Brian Wing Shun Chan
39   *
40   */
41  public class DynamicQueryFactoryImpl implements DynamicQueryFactory {
42  
43      public DynamicQuery forClass(Class<?> clazz) {
44          clazz = getImplClass(clazz);
45  
46          return new DynamicQueryImpl(DetachedCriteria.forClass(clazz));
47      }
48  
49      public DynamicQuery forClass(Class<?> clazz, ClassLoader classLoader) {
50          clazz = getImplClass(clazz, classLoader);
51  
52          return new DynamicQueryImpl(DetachedCriteria.forClass(clazz));
53      }
54  
55      public DynamicQuery forClass(Class<?> clazz, String alias) {
56          clazz = getImplClass(clazz);
57  
58          return new DynamicQueryImpl(DetachedCriteria.forClass(clazz, alias));
59      }
60  
61      public DynamicQuery forClass(
62          Class<?> clazz, String alias, ClassLoader classLoader) {
63  
64          clazz = getImplClass(clazz, classLoader);
65  
66          return new DynamicQueryImpl(DetachedCriteria.forClass(clazz, alias));
67      }
68  
69      protected Class<?> getImplClass(Class<?> clazz) {
70          return getImplClass(clazz, null);
71      }
72  
73      protected Class<?> getImplClass(Class<?> clazz, ClassLoader classLoader) {
74          if (!clazz.getName().endsWith("Impl")) {
75              String implClassName =
76                  clazz.getPackage().getName() + ".impl." +
77                      clazz.getSimpleName() + "Impl";
78  
79              clazz = _classMap.get(implClassName);
80  
81              if (clazz == null) {
82                  try {
83                      if (classLoader == null) {
84                          Thread currentThread = Thread.currentThread();
85  
86                          classLoader = currentThread.getContextClassLoader();
87                      }
88  
89                      clazz = classLoader.loadClass(implClassName);
90  
91                      _classMap.put(implClassName, clazz);
92                  }
93                  catch (Exception e) {
94                      _log.error("Unable find model " + implClassName, e);
95                  }
96              }
97          }
98  
99          return clazz;
100     }
101 
102     private static Log _log =
103         LogFactoryUtil.getLog(DynamicQueryFactoryImpl.class);
104 
105     private Map<String, Class<?>> _classMap = new HashMap<String, Class<?>>();
106 
107 }