New class EnumerationUtils.
git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/collections/trunk@131298 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Gary D. Gregory
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/*
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* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/java/org/apache/commons/collections/EnumerationUtils.java,v 1.1 2003/10/28 18:47:47 ggregory Exp $
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* ====================================================================
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*
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 1999-2003 The Apache Software Foundation. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution, if
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* any, must include the following acknowledgement:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowledgement may appear in the software itself,
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* if and wherever such third-party acknowledgements normally appear.
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*
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* 4. The names "The Jakarta Project", "Commons", and "Apache Software
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* Foundation" must not be used to endorse or promote products derived
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* from this software without prior written permission. For written
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* permission, please contact apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache"
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* nor may "Apache" appear in their names without prior written
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* permission of the Apache Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package org.apache.commons.collections;
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import java.util.Enumeration;
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import java.util.List;
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import org.apache.commons.collections.iterators.EnumerationIterator;
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/**
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* Provides utility methods for {@link Enumeration} instances.
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*
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* @author <a href="mailto:ggregory@seagullsw.com">Gary Gregory</a>
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* @version $Id: EnumerationUtils.java,v 1.1 2003/10/28 18:47:47 ggregory Exp $
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*/
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public class EnumerationUtils {
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/**
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* Do not instantiate.
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*/
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private EnumerationUtils() {
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// no init.
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}
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/**
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* Creates a list based on an enumeration.
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*
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* <p>As the enumeration is traversed, an ArrayList of its values is
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* created. The new list is returned.</p>
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*
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* @param enumeration the enumeration to traverse, which should not be <code>null</code>.
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* @throws <code>NullPointerException</code> if the enumeration parameter is <code>null</code>.
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*/
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public static List toList(Enumeration enumeration) {
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return IteratorUtils.toList(new EnumerationIterator(enumeration));
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}
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}
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/*
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* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/test/org/apache/commons/collections/TestEnumerationUtils.java,v 1.1 2003/10/28 18:48:10 ggregory Exp $
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* ====================================================================
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*
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 2001-2003 The Apache Software Foundation. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution, if
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* any, must include the following acknowledgement:
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|
* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowledgement may appear in the software itself,
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* if and wherever such third-party acknowledgements normally appear.
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*
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* 4. The names "The Jakarta Project", "Commons", and "Apache Software
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* Foundation" must not be used to endorse or promote products derived
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* from this software without prior written permission. For written
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* permission, please contact apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache"
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* nor may "Apache" appear in their names without prior written
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* permission of the Apache Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package org.apache.commons.collections;
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import java.util.ArrayList;
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import java.util.Hashtable;
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import java.util.List;
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import java.util.StringTokenizer;
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import junit.framework.Assert;
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import junit.framework.TestCase;
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/**
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* Tests EnumerationUtils.
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*
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* @author <a href="mailto:ggregory@seagullsw.com">Gary Gregory</a>
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* @version $Id: TestEnumerationUtils.java,v 1.1 2003/10/28 18:48:10 ggregory Exp $
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*/
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public class TestEnumerationUtils extends TestCase {
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public static final String TO_LIST_FIXTURE = "this is a test";
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public void testToListWithStringTokenizer() {
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List expectedList1 = new ArrayList();
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StringTokenizer st = new StringTokenizer(TO_LIST_FIXTURE);
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while (st.hasMoreTokens()) {
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expectedList1.add(st.nextToken());
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}
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List expectedList2 = new ArrayList();
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expectedList2.add("this");
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expectedList2.add("is");
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expectedList2.add("a");
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expectedList2.add("test");
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List actualList = EnumerationUtils.toList(new StringTokenizer(TO_LIST_FIXTURE));
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Assert.assertEquals(expectedList1, expectedList2);
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Assert.assertEquals(expectedList1, actualList);
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Assert.assertEquals(expectedList2, actualList);
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}
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public void testToListWithHashtable() {
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Hashtable expected = new Hashtable();
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expected.put("one", new Integer(1));
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expected.put("two", new Integer(2));
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expected.put("three", new Integer(3));
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// validate elements.
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List actualEltList = EnumerationUtils.toList(expected.elements());
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Assert.assertEquals(expected.size(), actualEltList.size());
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Assert.assertTrue(actualEltList.contains(new Integer(1)));
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Assert.assertTrue(actualEltList.contains(new Integer(2)));
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Assert.assertTrue(actualEltList.contains(new Integer(3)));
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List expectedEltList = new ArrayList();
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expectedEltList.add(new Integer(1));
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expectedEltList.add(new Integer(2));
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expectedEltList.add(new Integer(3));
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Assert.assertTrue(actualEltList.containsAll(expectedEltList));
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// validate keys.
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List actualKeyList = EnumerationUtils.toList(expected.keys());
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Assert.assertEquals(expected.size(), actualEltList.size());
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Assert.assertTrue(actualKeyList.contains("one"));
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Assert.assertTrue(actualKeyList.contains("two"));
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Assert.assertTrue(actualKeyList.contains("three"));
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List expectedKeyList = new ArrayList();
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expectedKeyList.add("one");
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expectedKeyList.add("two");
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expectedKeyList.add("three");
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Assert.assertTrue(actualKeyList.containsAll(expectedKeyList));
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}
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}
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