| /* |
| * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8011200 |
| * @run testng BasicSerialization |
| * @summary Ensure Maps can be serialized and deserialized. |
| * @author Mike Duigou |
| */ |
| import java.io.ByteArrayOutputStream; |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.ByteArrayInputStream; |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.Method; |
| import java.util.*; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentSkipListMap; |
| |
| import org.testng.annotations.Test; |
| import org.testng.annotations.DataProvider; |
| import static org.testng.Assert.fail; |
| import static org.testng.Assert.assertEquals; |
| import static org.testng.Assert.assertTrue; |
| import static org.testng.Assert.assertFalse; |
| import static org.testng.Assert.assertSame; |
| |
| public class BasicSerialization { |
| |
| enum IntegerEnum { |
| |
| e0, e1, e2, e3, e4, e5, e6, e7, e8, e9, |
| e10, e11, e12, e13, e14, e15, e16, e17, e18, e19, |
| e20, e21, e22, e23, e24, e25, e26, e27, e28, e29, |
| e30, e31, e32, e33, e34, e35, e36, e37, e38, e39, |
| e40, e41, e42, e43, e44, e45, e46, e47, e48, e49, |
| e50, e51, e52, e53, e54, e55, e56, e57, e58, e59, |
| e60, e61, e62, e63, e64, e65, e66, e67, e68, e69, |
| e70, e71, e72, e73, e74, e75, e76, e77, e78, e79, |
| e80, e81, e82, e83, e84, e85, e86, e87, e88, e89, |
| e90, e91, e92, e93, e94, e95, e96, e97, e98, e99, |
| EXTRA_KEY; |
| public static final int SIZE = values().length; |
| }; |
| private static final int TEST_SIZE = IntegerEnum.SIZE - 1; |
| /** |
| * Realized keys ensure that there is always a hard ref to all test objects. |
| */ |
| private static final IntegerEnum[] KEYS = new IntegerEnum[TEST_SIZE]; |
| /** |
| * Realized values ensure that there is always a hard ref to all test |
| * objects. |
| */ |
| private static final String[] VALUES = new String[TEST_SIZE]; |
| |
| static { |
| IntegerEnum[] keys = IntegerEnum.values(); |
| for (int each = 0; each < TEST_SIZE; each++) { |
| KEYS[each] = keys[each]; |
| VALUES[each] = keys[each].name(); |
| } |
| } |
| private static final IntegerEnum EXTRA_KEY = IntegerEnum.EXTRA_KEY; |
| private static final String EXTRA_VALUE = IntegerEnum.EXTRA_KEY.name(); |
| |
| public static <K, V> Map<K, V> mapClone(Map<K, V> map) { |
| Method cloneMethod; |
| |
| try { |
| cloneMethod = map.getClass().getMethod("clone", new Class[]{}); |
| } catch (NoSuchMethodException | SecurityException all) { |
| cloneMethod = null; |
| } |
| |
| if (null != cloneMethod) { |
| try { |
| Map<K, V> result = (Map<K, V>)cloneMethod.invoke(map, new Object[]{}); |
| return result; |
| } catch (Exception all) { |
| fail("clone() failed " + map.getClass().getSimpleName(), all); |
| return null; |
| } |
| } else { |
| Constructor<? extends Map> copyConstructor; |
| try { |
| copyConstructor = (Constructor<? extends Map>)map.getClass().getConstructor(new Class[]{Map.class}); |
| |
| Map<K, V> result = (Map<K, V>)copyConstructor.newInstance(new Object[]{map}); |
| |
| return result; |
| } catch (Exception all) { |
| return serialClone(map); |
| } |
| } |
| } |
| |
| @Test(dataProvider = "Map<IntegerEnum,String>") |
| public void testSerialization(String description, Map<IntegerEnum, String> map) { |
| Object foo = new Object(); |
| |
| Map<IntegerEnum, String> clone = mapClone(map); |
| Map<IntegerEnum, String> serialClone = serialClone(map); |
| |
| assertEquals(map, map, description + ":should equal self"); |
| assertEquals(clone, map, description + ":should equal clone"); |
| assertEquals(map, clone, description + ": should equal orginal map"); |
| assertEquals(serialClone, map, description + ": should equal deserialized clone"); |
| assertEquals(map, serialClone, description + ": should equal original map"); |
| assertEquals(serialClone, clone, description + ": deserialized clone should equal clone"); |
| assertEquals(clone, serialClone, description + ": clone should equal deserialized clone"); |
| |
| assertFalse(map.containsKey(EXTRA_KEY), description + ":unexpected key"); |
| assertFalse(clone.containsKey(EXTRA_KEY), description + ":unexpected key"); |
| assertFalse(serialClone.containsKey(EXTRA_KEY), description + ":unexpected key"); |
| map.put(EXTRA_KEY, EXTRA_VALUE); |
| clone.put(EXTRA_KEY, EXTRA_VALUE); |
| serialClone.put(EXTRA_KEY, EXTRA_VALUE); |
| assertTrue(map.containsKey(EXTRA_KEY), description + ":missing key"); |
| assertTrue(clone.containsKey(EXTRA_KEY), description + ":missing key"); |
| assertTrue(serialClone.containsKey(EXTRA_KEY), description + ":missing key"); |
| assertSame(map.get(EXTRA_KEY), EXTRA_VALUE, description + ":wrong value"); |
| assertSame(clone.get(EXTRA_KEY), EXTRA_VALUE, description + ":wrong value"); |
| assertSame(serialClone.get(EXTRA_KEY), EXTRA_VALUE, description + ":wrong value"); |
| |
| assertEquals(map, map, description + ":should equal self"); |
| assertEquals(clone, map, description + ":should equal clone"); |
| assertEquals(map, clone, description + ": should equal orginal map"); |
| assertEquals(serialClone, map, description + ": should equal deserialized clone"); |
| assertEquals(map, serialClone, description + ": should equal original map"); |
| assertEquals(serialClone, clone, description + ": deserialized clone should equal clone"); |
| assertEquals(clone, serialClone, description + ": clone should equal deserialized clone"); |
| } |
| |
| static byte[] serializedForm(Object obj) { |
| try { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| new ObjectOutputStream(baos).writeObject(obj); |
| return baos.toByteArray(); |
| } catch (IOException e) { |
| fail("Unexpected Exception", e); |
| return null; |
| } |
| } |
| |
| static Object readObject(byte[] bytes) throws IOException, ClassNotFoundException { |
| InputStream is = new ByteArrayInputStream(bytes); |
| return new ObjectInputStream(is).readObject(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| static <T> T serialClone(T obj) { |
| try { |
| return (T)readObject(serializedForm(obj)); |
| } catch (IOException | ClassNotFoundException e) { |
| fail("Unexpected Exception", e); |
| return null; |
| } |
| } |
| |
| @DataProvider(name = "Map<IntegerEnum,String>", parallel = true) |
| private static Iterator<Object[]> makeMaps() { |
| return Arrays.asList( |
| // empty |
| new Object[]{"HashMap", new HashMap()}, |
| new Object[]{"LinkedHashMap", new LinkedHashMap()}, |
| new Object[]{"Collections.checkedMap(HashMap)", Collections.checkedMap(new HashMap(), IntegerEnum.class, String.class)}, |
| new Object[]{"Collections.synchronizedMap(HashMap)", Collections.synchronizedMap(new HashMap())}, |
| // null hostile |
| new Object[]{"EnumMap", new EnumMap(IntegerEnum.class)}, |
| new Object[]{"Hashtable", new Hashtable()}, |
| new Object[]{"TreeMap", new TreeMap()}, |
| new Object[]{"ConcurrentHashMap", new ConcurrentHashMap()}, |
| new Object[]{"ConcurrentSkipListMap", new ConcurrentSkipListMap()}, |
| new Object[]{"Collections.checkedMap(ConcurrentHashMap)", Collections.checkedMap(new ConcurrentHashMap(), IntegerEnum.class, String.class)}, |
| new Object[]{"Collections.synchronizedMap(EnumMap)", Collections.synchronizedMap(new EnumMap(IntegerEnum.class))}, |
| // filled |
| new Object[]{"HashMap", fillMap(new HashMap())}, |
| new Object[]{"LinkedHashMap", fillMap(new LinkedHashMap())}, |
| new Object[]{"Collections.checkedMap(HashMap)", Collections.checkedMap(fillMap(new HashMap()), IntegerEnum.class, String.class)}, |
| new Object[]{"Collections.synchronizedMap(HashMap)", Collections.synchronizedMap(fillMap(new HashMap()))}, |
| // null hostile |
| new Object[]{"EnumMap", fillMap(new EnumMap(IntegerEnum.class))}, |
| new Object[]{"Hashtable", fillMap(new Hashtable())}, |
| new Object[]{"TreeMap", fillMap(new TreeMap())}, |
| new Object[]{"ConcurrentHashMap", fillMap(new ConcurrentHashMap())}, |
| new Object[]{"ConcurrentSkipListMap", fillMap(new ConcurrentSkipListMap())}, |
| new Object[]{"Collections.checkedMap(ConcurrentHashMap)", Collections.checkedMap(fillMap(new ConcurrentHashMap()), IntegerEnum.class, String.class)}, |
| new Object[]{"Collections.synchronizedMap(EnumMap)", Collections.synchronizedMap(fillMap(new EnumMap(IntegerEnum.class)))}).iterator(); |
| } |
| |
| private static Map<IntegerEnum, String> fillMap(Map<IntegerEnum, String> result) { |
| for (int each = 0; each < TEST_SIZE; each++) { |
| result.put(KEYS[each], VALUES[each]); |
| } |
| |
| return result; |
| } |
| } |