Commons Collections example source code file (TestLazySortedMap.java)

This example Commons Collections source code file (TestLazySortedMap.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

a, a, b, b, c, c, factory, illegalargumentexception, last, one, sortedmap, string, string, treemap, util

The Commons Collections TestLazySortedMap.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.map;

import java.util.Comparator;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;

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

import org.apache.commons.collections.Factory;
import org.apache.commons.collections.FactoryUtils;
import org.apache.commons.collections.Transformer;
import org.apache.commons.collections.TransformerUtils;

/**
 * Extension of {@link TestLazyMap} for exercising the 
 * {@link LazySortedMap} implementation.
 *
 * @since Commons Collections 3.0
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Phil Steitz
 */
public class TestLazySortedMap extends AbstractTestSortedMap {
    
    protected static final Factory oneFactory = FactoryUtils.constantFactory("One");
    protected static final Factory nullFactory = FactoryUtils.nullFactory();
    
    public TestLazySortedMap(String testName) {
        super(testName);
    }
    
    public static Test suite() {
        return new TestSuite(TestLazySortedMap.class);
    }
    
    public static void main(String args[]) {
        String[] testCaseName = { TestLazySortedMap.class.getName()};
        junit.textui.TestRunner.main(testCaseName);
    }

    //-----------------------------------------------------------------------    
    protected SortedMap decorateMap(SortedMap map, Factory factory) {
        return LazySortedMap.decorate(map, factory);
    }
    
    public Map makeEmptyMap() {
        return decorateMap(new TreeMap(), nullFactory);
    }
    
    protected SortedMap makeTestSortedMap(Factory factory) {
        return decorateMap(new TreeMap(), factory);
    }
    
    public boolean isSubMapViewsSerializable() {
        // TreeMap sub map views have a bug in deserialization.
        return false;
    }

    public boolean isAllowNullKey() {
        return false;
    }

    // from TestLazyMap
    //-----------------------------------------------------------------------
    public void testMapGet() {
        Map map = makeTestSortedMap(oneFactory);
        assertEquals(0, map.size());
        String s1 = (String) map.get("Five");
        assertEquals("One", s1);
        assertEquals(1, map.size());
        String s2 = (String) map.get(new String(new char[] {'F','i','v','e'}));
        assertEquals("One", s2);
        assertEquals(1, map.size());
        assertSame(s1, s2);
        
        map = makeTestSortedMap(nullFactory);
        Object o = map.get("Five");
        assertEquals(null,o);
        assertEquals(1, map.size());
        
    }
    
    //-----------------------------------------------------------------------
    public void testSortOrder() {
        SortedMap map = makeTestSortedMap(oneFactory);
        map.put("A",  "a");
        map.get("B"); // Entry with value "One" created
        map.put("C", "c");
        assertEquals("First key should be A", map.firstKey(), "A");
        assertEquals("Last key should be C", map.lastKey(), "C");
        assertEquals("First key in tail map should be B", 
            map.tailMap("B").firstKey(), "B");
        assertEquals("Last key in head map should be B", 
            map.headMap("C").lastKey(), "B");
        assertEquals("Last key in submap should be B",
           map.subMap("A","C").lastKey(), "B");
        
        Comparator c = map.comparator();
        assertTrue("natural order, so comparator should be null", 
            c == null);      
    } 
    
    public void testTransformerDecorate() {
        Transformer transformer = TransformerUtils.asTransformer(oneFactory);
        SortedMap map = LazySortedMap.decorate(new TreeMap(), transformer);     
        assertTrue(map instanceof LazySortedMap);  
         try {
            map = LazySortedMap.decorate(new TreeMap(), (Transformer) null);
            fail("Expecting IllegalArgumentException for null transformer");
        } catch (IllegalArgumentException e) {
            // expected
        }
        try {
            map = LazySortedMap.decorate(null, transformer);
            fail("Expecting IllegalArgumentException for null map");
        } catch (IllegalArgumentException e) {
            // expected
        } 
    }
    
    public String getCompatibilityVersion() {
        return "3.1";
    }

//    public void testCreate() throws Exception {
//        resetEmpty();
//        writeExternalFormToDisk(
//            (java.io.Serializable) map,
//            "D:/dev/collections/data/test/LazySortedMap.emptyCollection.version3.1.obj");
//        resetFull();
//        writeExternalFormToDisk(
//            (java.io.Serializable) map,
//            "D:/dev/collections/data/test/LazySortedMap.fullCollection.version3.1.obj");
//    }
}