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1   /*
2    * Copyright 2005 The Apache Software Foundation.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.commons.math.stat.inference;
17  import org.apache.commons.discovery.tools.DiscoverClass;
18  
19  /**
20   * Abstract factory to create inference test instances.
21   *
22   * @since 1.1
23   * @version $Revision: 209144 $ $Date: 2005-07-04 16:30:05 -0700 (Mon, 04 Jul 2005) $ 
24   */
25  public abstract class TestFactory {
26      /**
27       * Default constructor.
28       */
29      protected TestFactory() {
30          super();
31      }
32      
33      /**
34       * Create an instance of a <code>TestFactory</code>
35       * 
36       * @return a new factory. 
37       */
38      public static TestFactory newInstance() {
39          TestFactory factory = null;
40          try {
41              DiscoverClass dc = new DiscoverClass();
42              factory = (TestFactory) dc.newInstance(
43                      TestFactory.class,
44              "org.apache.commons.math.stat.inference.TestFactoryImpl");
45          } catch(Throwable t) {
46              return new TestFactoryImpl();
47          }
48          return factory;
49      }
50      
51      /**
52       * Create a TTest instance.
53       * 
54       * @return a new TTest instance
55       */
56      public abstract TTest createTTest();
57      
58      /**
59       * Create a ChiSquareTest instance.
60       * 
61       * @return a new ChiSquareTest instance
62       */
63      public abstract ChiSquareTest createChiSquareTest();  
64  }