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Commons Collections example source code file (TestNullComparator.java)

This example Commons Collections source code file (TestNullComparator.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Collections tags/keywords

comparator, comparator, integer, integer, linkedlist, list, list, nullcomparator, string, testnullcomparator, testnullcomparator, testnullcomparator1, testnullcomparator2, testsuite, util

The Commons Collections TestNullComparator.java source code

/*
 *  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.collections.comparators;

import java.util.Comparator;
import java.util.LinkedList;
import java.util.List;

import junit.framework.Test;
import junit.framework.TestSuite;

/**
 * Test the NullComparator.
 * 
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Michael A. Smith
 */
public abstract class TestNullComparator extends AbstractTestComparator {

    public TestNullComparator(String testName) {
        super(testName);
    }

    public static Test suite() {
        TestSuite suite = new TestSuite(TestNullComparator.class.getName());
        suite.addTest(new TestSuite(TestNullComparator1.class));
        suite.addTest(new TestSuite(TestNullComparator2.class));
        return suite;
    }

    /**
     *  Test the NullComparator with nulls high, using comparable comparator
     **/
    public static class TestNullComparator1 extends TestNullComparator {

	public TestNullComparator1(String testName) {
	    super(testName);
	}

    public Comparator makeComparator() {
	    return new NullComparator();
	}
	
    public List getComparableObjectsOrdered() {
        List list = new LinkedList();
	    list.add(new Integer(1));
	    list.add(new Integer(2));
	    list.add(new Integer(3));
	    list.add(new Integer(4));
	    list.add(new Integer(5));
	    list.add(null);
	    return list;
	}

	public String getCanonicalComparatorName(Object object) {
	    return super.getCanonicalComparatorName(object) + "1";
	}
    }

    /**
     *  Test the NullComparator with nulls low using the comparable comparator
     **/
    public static class TestNullComparator2 extends TestNullComparator {
        
        public TestNullComparator2(String testName) {
            super(testName);
        }
        
        public Comparator makeComparator() {
            return new NullComparator(false);
        }
        
        public List getComparableObjectsOrdered() {
            List list = new LinkedList();
            list.add(null);
            list.add(new Integer(1));
            list.add(new Integer(2));
            list.add(new Integer(3));
            list.add(new Integer(4));
            list.add(new Integer(5));
            return list;
        }
        
        public String getCanonicalComparatorName(Object object) {
            return super.getCanonicalComparatorName(object) + "2";
        }
    }
}

Other Commons Collections examples (source code examples)

Here is a short list of links related to this Commons Collections TestNullComparator.java source code file:



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