testfactory.java

Apache的common math数学软件包

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.math.stat.inference;
import org.apache.commons.discovery.tools.DiscoverClass;

/**
 * Abstract factory to create inference test instances.
 *
 * @since 1.1
 * @version $Revision: 574050 $ $Date: 2007-09-09 11:54:08 -0700 (Sun, 09 Sep 2007) $ 
 * @deprecated as of 1.2, pluggability of test instances is now provided through
 *             constructors and setters.
 */
public abstract class TestFactory {
    /**
     * Default constructor.
     */
    protected TestFactory() {
        super();
    }
    
    /**
     * Create an instance of a <code>TestFactory</code>
     * 
     * @return a new factory. 
     */
    public static TestFactory newInstance() {
        TestFactory factory = null;
        try {
            DiscoverClass dc = new DiscoverClass();
            factory = (TestFactory) dc.newInstance(
                    TestFactory.class,
            "org.apache.commons.math.stat.inference.TestFactoryImpl");
        } catch(Throwable t) {
            return new TestFactoryImpl();
        }
        return factory;
    }
    
    /**
     * Create a TTest instance.
     * 
     * @return a new TTest instance
     */
    public abstract TTest createTTest();
    
    /**
     * Create a ChiSquareTest instance.
     * 
     * @return a new ChiSquareTest instance
     */
    public abstract ChiSquareTest createChiSquareTest();  
}