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Commons Collections example source code file (TestLazyMap.java)

This example Commons Collections source code file (TestLazyMap.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

abstracttestmap, f','i','v','e, factory, factory, five, hashmap, map, map, object, one, one, string, string, testlazymap, util

The Commons Collections TestLazyMap.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.HashMap;
import java.util.Map;

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

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

 * Extension of {@link TestMap} for exercising the 
 * {@link LazyMap} 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 TestLazyMap extends AbstractTestMap {
    protected static final Factory oneFactory = FactoryUtils.constantFactory("One");
    protected static final Factory nullFactory = FactoryUtils.nullFactory();
    public TestLazyMap(String testName) {
    public static Test suite() {
        return new TestSuite(TestLazyMap.class);
    public static void main(String args[]) {
        String[] testCaseName = { TestLazyMap.class.getName()};

    protected Map decorateMap(Map map, Factory factory) {
        return LazyMap.decorate(map, factory);
    public Map makeEmptyMap() {
        return decorateMap(new HashMap(), nullFactory);
    protected Map makeTestMap(Factory factory) {
        return decorateMap(new HashMap(), factory);

    public void testMapGet() {
        Map map = makeTestMap(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 = makeTestMap(nullFactory);
        Object o = map.get("Five");
        assertEquals(1, map.size());
    public String getCompatibilityVersion() {
        return "3.1";

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

Other Commons Collections examples (source code examples)

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

my book on functional programming


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