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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.math.stat.inference;
18  import org.apache.commons.discovery.tools.DiscoverClass;
19  
20  /**
21   * Abstract factory to create inference test instances.
22   *
23   * @since 1.1
24   * @version $Revision: 574050 $ $Date: 2007-09-09 11:54:08 -0700 (Sun, 09 Sep 2007) $ 
25   * @deprecated as of 1.2, pluggability of test instances is now provided through
26   *             constructors and setters.
27   */
28  public abstract class TestFactory {
29      /**
30       * Default constructor.
31       */
32      protected TestFactory() {
33          super();
34      }
35      
36      /**
37       * Create an instance of a <code>TestFactory</code>
38       * 
39       * @return a new factory. 
40       */
41      public static TestFactory newInstance() {
42          TestFactory factory = null;
43          try {
44              DiscoverClass dc = new DiscoverClass();
45              factory = (TestFactory) dc.newInstance(
46                      TestFactory.class,
47              "org.apache.commons.math.stat.inference.TestFactoryImpl");
48          } catch(Throwable t) {
49              return new TestFactoryImpl();
50          }
51          return factory;
52      }
53      
54      /**
55       * Create a TTest instance.
56       * 
57       * @return a new TTest instance
58       */
59      public abstract TTest createTTest();
60      
61      /**
62       * Create a ChiSquareTest instance.
63       * 
64       * @return a new ChiSquareTest instance
65       */
66      public abstract ChiSquareTest createChiSquareTest();  
67  }