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Commons Collections example source code file (TestTransformedCollection.java)

This example Commons Collections source code file (TestTransformedCollection.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

arraylist, arraylist, collection, collection, integer, noop_transformer, noop_transformer, object, object, string, string_to_integer_transformer, stringtointeger, testtransformedcollection, transformer, util

The Commons Collections TestTransformedCollection.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.collection;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

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

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

/**
 * Extension of {@link TestCollection} for exercising the {@link TransformedCollection}
 * implementation.
 *
 * @since Commons Collections 3.0
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Stephen Colebourne
 */
public class TestTransformedCollection extends AbstractTestCollection {
    
    private static class StringToInteger implements Transformer {
        public Object transform(Object input) {
            return new Integer((String) input);
        }
    }
    
    public static final Transformer NOOP_TRANSFORMER = TransformerUtils.nopTransformer();
    public static final Transformer STRING_TO_INTEGER_TRANSFORMER = new StringToInteger();

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

    public static Test suite() {
        return new TestSuite(TestTransformedCollection.class);
    }

    public static void main(String args[]) {
        String[] testCaseName = { TestTransformedCollection.class.getName()};
        junit.textui.TestRunner.main(testCaseName);
    }

    //-----------------------------------------------------------------------
    public Collection makeConfirmedCollection() {
        return new ArrayList();
    }

    public Collection makeConfirmedFullCollection() {
        List list = new ArrayList();
        list.addAll(Arrays.asList(getFullElements()));
        return list;
    }
    
    public Collection makeCollection() {
        return TransformedCollection.decorate(new ArrayList(), NOOP_TRANSFORMER);
    }

    public Collection makeFullCollection() {
        List list = new ArrayList();
        list.addAll(Arrays.asList(getFullElements()));
        return TransformedCollection.decorate(list, NOOP_TRANSFORMER);
    }
    
    //-----------------------------------------------------------------------
    public Object[] getFullElements() {
        return new Object[] {"1", "3", "5", "7", "2", "4", "6"};
    }

    public Object[] getOtherElements() {
        return new Object[] {"9", "88", "678", "87", "98", "78", "99"};
    }

    //-----------------------------------------------------------------------
    public void testTransformedCollection() {
        Collection coll = TransformedCollection.decorate(new ArrayList(), STRING_TO_INTEGER_TRANSFORMER);
        assertEquals(0, coll.size());
        Object[] els = getFullElements();
        for (int i = 0; i < els.length; i++) {
            coll.add(els[i]);
            assertEquals(i + 1, coll.size());
            assertEquals(true, coll.contains(new Integer((String) els[i])));
            assertEquals(false, coll.contains(els[i]));
        }
        
        assertEquals(true, coll.remove(new Integer((String) els[0])));
    }

    public String getCompatibilityVersion() {
        return "3.1";
    }

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

}

Other Commons Collections examples (source code examples)

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