author | kvn |
Thu, 05 Dec 2013 15:13:12 -0800 (2013-12-05) | |
changeset 22858 | f4a6f0eba875 |
parent 17432 | efdf6eb85a17 |
child 23010 | 6dadb192ad81 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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|
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import org.testng.annotations.Test; |
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import java.lang.reflect.Constructor; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Collections; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.ListIterator; |
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import java.util.NoSuchElementException; |
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import static org.testng.Assert.assertEquals; |
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import static org.testng.Assert.assertFalse; |
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import static org.testng.Assert.assertTrue; |
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import static org.testng.Assert.fail; |
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/** |
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* @test |
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* @run testng IteratorDefaults |
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* @summary test extension methods on Iterator |
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*/ |
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@Test |
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public class IteratorDefaults { |
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private static interface Callback { |
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void call(List<Integer> list); |
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} |
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// call the callback for each recursive subList |
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private void trimmedSubList(final List<Integer> list, final Callback callback) { |
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int size = list.size(); |
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if (size > 1) { |
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// trim 1 element from both ends |
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final List<Integer> subList = list.subList(1, size - 1); |
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callback.call(subList); |
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trimmedSubList(subList, callback); |
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} |
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} |
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public void testRemoveUnsupported() { |
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final Iterator iterator = new Iterator() { |
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@Override |
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public boolean hasNext() { |
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return false; |
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} |
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@Override |
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public Object next() { |
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return null; |
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} |
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}; |
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try { |
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iterator.remove(); |
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fail("expected UnsupportedOperationException from remove not thrown"); |
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} catch (UnsupportedOperationException ignore) { |
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} |
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} |
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public void testRemoveOverride() { |
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final IteratorWithRemove iterator = new IteratorWithRemove(); |
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iterator.remove(); |
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assertTrue(iterator.removed); |
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} |
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public void testForEach() throws Exception { |
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final Integer[] data = new Integer[1000]; |
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for (int i=0; i < data.length; i++) { |
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data[i] = i; |
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} |
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final List<Integer> source = Arrays.asList(data); |
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final String[] iterableCollectionClasses = { |
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"java.util.ArrayDeque", |
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"java.util.ArrayList", |
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"java.util.HashSet", |
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"java.util.LinkedHashSet", |
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"java.util.LinkedList", |
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"java.util.PriorityQueue", |
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"java.util.TreeSet", |
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"java.util.Vector", |
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"java.util.concurrent.ConcurrentLinkedDeque", |
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"java.util.concurrent.ConcurrentLinkedQueue", |
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"java.util.concurrent.ConcurrentSkipListSet", |
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"java.util.concurrent.CopyOnWriteArrayList", |
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"java.util.concurrent.CopyOnWriteArraySet", |
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"java.util.concurrent.LinkedBlockingDeque", |
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"java.util.concurrent.LinkedBlockingQueue", |
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"java.util.concurrent.LinkedTransferQueue", |
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"java.util.concurrent.PriorityBlockingQueue" |
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}; |
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for (final String iterableClass : iterableCollectionClasses) { |
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final Iterable<Integer> iterable = |
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(Iterable<Integer>) Class.forName(iterableClass).newInstance(); |
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((Collection<Integer>) iterable).addAll(source); |
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final Iterator<Integer> iterator = iterable.iterator(); |
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final List<Integer> target = new ArrayList<>(source.size()); |
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iterator.forEachRemaining(target::add); |
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if ("java.util.HashSet".equals(iterableClass)) { |
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target.sort((x, y) -> x - y); |
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assertEquals(target, source); |
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} else { |
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assertEquals(target, source); |
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} |
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// verify that for an iterator that has been advanced via next(), |
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// forEach starts from the current location, not zero |
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final int OFFSET = 5; |
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final List<Integer> reference2 = new ArrayList<>(source).subList(OFFSET, source.size()); |
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final List<Integer> removed2 = new ArrayList<>(OFFSET); |
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final Iterator<Integer> iterator2 = iterable.iterator(); |
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for (int i=0; i < OFFSET; i++) { |
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// advance the iterator by OFFSET, saving iterated elements |
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removed2.add(iterator2.next()); |
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} |
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final List<Integer> target2 = new ArrayList<>(reference2.size()); |
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iterator2.forEachRemaining(target2::add); |
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if ("java.util.HashSet".equals(iterableClass)) { |
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assertEquals(target2.size(), reference2.size()); |
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target2.addAll(removed2); |
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target2.sort((x, y) -> x - y); |
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assertEquals(target2, source); |
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assertEquals(target2.subList(OFFSET, source.size()), reference2); |
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148 |
} else { |
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149 |
assertEquals(target2, reference2); |
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|
150 |
} |
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|
151 |
} |
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|
152 |
} |
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|
153 |
|
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154 |
public void testForEachSubList() throws Exception { |
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final Integer[] data = new Integer[100]; |
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156 |
for (int i = 0; i < data.length; i++) { |
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data[i] = i; |
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|
158 |
} |
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final List<Integer> source = Arrays.asList(data); |
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|
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final String[] listClasses = { |
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161 |
"java.util.ArrayList", |
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162 |
"java.util.LinkedList", |
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"java.util.Vector", |
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164 |
"java.util.concurrent.CopyOnWriteArrayList" |
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165 |
}; |
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166 |
for (final String listClass : listClasses) { |
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|
167 |
final List<Integer> list = |
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(List<Integer>) Class.forName(listClass).newInstance(); |
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|
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list.addAll(source); |
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|
170 |
trimmedSubList(list, new Callback() { |
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|
171 |
@Override |
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|
172 |
public void call(final List<Integer> list) { |
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|
173 |
if (list.size() < 1) { |
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|
174 |
return; |
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|
175 |
} |
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176 |
final List<Integer> target = new ArrayList<>(list.size()); |
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177 |
final ListIterator<Integer> iterator = list.listIterator(); |
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|
178 |
assertTrue(iterator.hasNext()); |
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|
179 |
assertFalse(iterator.hasPrevious()); |
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|
180 |
assertEquals(iterator.nextIndex(), 0); |
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|
181 |
assertEquals(iterator.previousIndex(), -1); |
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|
182 |
|
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|
183 |
iterator.forEachRemaining(target::add); |
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|
184 |
assertEquals(target, list); |
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diff
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|
185 |
|
efdf6eb85a17
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|
186 |
assertFalse(iterator.hasNext()); |
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|
187 |
assertTrue(iterator.hasPrevious()); |
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|
188 |
assertEquals(iterator.nextIndex(), list.size()); |
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|
189 |
assertEquals(iterator.previousIndex(), list.size() - 1); |
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changeset
|
190 |
|
efdf6eb85a17
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|
191 |
try { |
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diff
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|
192 |
iterator.next(); |
efdf6eb85a17
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|
193 |
fail(listClass + " iterator advanced beyond end"); |
efdf6eb85a17
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parents:
diff
changeset
|
194 |
} catch (NoSuchElementException ignore) { |
efdf6eb85a17
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parents:
diff
changeset
|
195 |
} |
efdf6eb85a17
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parents:
diff
changeset
|
196 |
} |
efdf6eb85a17
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parents:
diff
changeset
|
197 |
}); |
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diff
changeset
|
198 |
} |
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parents:
diff
changeset
|
199 |
} |
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parents:
diff
changeset
|
200 |
|
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
201 |
public void testOptimizedForEach() throws Exception { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
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|
202 |
final Integer[] data = new Integer[1000 * 1000]; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
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parents:
diff
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|
203 |
for (int i=0; i < data.length; i++) { |
efdf6eb85a17
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diff
changeset
|
204 |
data[i] = i; |
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parents:
diff
changeset
|
205 |
} |
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parents:
diff
changeset
|
206 |
final List<Integer> source = Arrays.asList(data); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
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parents:
diff
changeset
|
207 |
|
efdf6eb85a17
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parents:
diff
changeset
|
208 |
final String[] listClasses = { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
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parents:
diff
changeset
|
209 |
"java.util.ArrayList", |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
210 |
"java.util.LinkedList", |
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parents:
diff
changeset
|
211 |
"java.util.Vector", |
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parents:
diff
changeset
|
212 |
"java.util.concurrent.CopyOnWriteArrayList" |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
213 |
}; |
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mduigou
parents:
diff
changeset
|
214 |
|
efdf6eb85a17
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parents:
diff
changeset
|
215 |
final int OFFSET = 3; |
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parents:
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|
216 |
final List<Integer> target = new ArrayList<>(source); |
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parents:
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changeset
|
217 |
for (final String listClass : listClasses) { |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
218 |
final List<Integer> list = |
efdf6eb85a17
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parents:
diff
changeset
|
219 |
(List<Integer>) Class.forName(listClass).newInstance(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
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|
220 |
list.addAll(source); |
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mduigou
parents:
diff
changeset
|
221 |
final ListIterator<Integer> iterator = list.listIterator(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
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parents:
diff
changeset
|
222 |
assertFalse(iterator.hasPrevious()); |
efdf6eb85a17
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parents:
diff
changeset
|
223 |
for (int i=0; i < OFFSET; i++) { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
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parents:
diff
changeset
|
224 |
iterator.next(); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
225 |
} |
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diff
changeset
|
226 |
assertTrue(iterator.hasNext()); |
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parents:
diff
changeset
|
227 |
assertTrue(iterator.hasPrevious()); |
efdf6eb85a17
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parents:
diff
changeset
|
228 |
assertEquals(iterator.nextIndex(), OFFSET); |
efdf6eb85a17
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parents:
diff
changeset
|
229 |
assertEquals(iterator.previousIndex(), OFFSET - 1); |
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parents:
diff
changeset
|
230 |
|
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
231 |
iterator.forEachRemaining(e -> { |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
232 |
target.set(e, e + 1); |
efdf6eb85a17
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parents:
diff
changeset
|
233 |
}); |
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parents:
diff
changeset
|
234 |
for (int i=OFFSET; i < data.length; i++) { |
efdf6eb85a17
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parents:
diff
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|
235 |
assertEquals(target.get(i).intValue(), source.get(i)+1); |
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mduigou
parents:
diff
changeset
|
236 |
} |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
237 |
|
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
238 |
assertFalse(iterator.hasNext()); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
239 |
assertTrue(iterator.hasPrevious()); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
240 |
assertEquals(iterator.nextIndex(), data.length); |
efdf6eb85a17
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parents:
diff
changeset
|
241 |
assertEquals(iterator.previousIndex(), data.length - 1); |
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diff
changeset
|
242 |
|
efdf6eb85a17
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parents:
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changeset
|
243 |
// CopyOnWriteArrayList.listIterator().remove() is unsupported |
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diff
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|
244 |
if (!"java.util.concurrent.CopyOnWriteArrayList".equals(listClass)) { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
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parents:
diff
changeset
|
245 |
for (int i = data.length - 1; i >= 0; i--) { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
246 |
iterator.remove(); // must not throw |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
247 |
if (i > 0) { |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
248 |
iterator.previous(); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
249 |
} |
efdf6eb85a17
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parents:
diff
changeset
|
250 |
} |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
251 |
assertTrue(list.isEmpty()); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
252 |
} |
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parents:
diff
changeset
|
253 |
|
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
254 |
try { |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
255 |
iterator.next(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
256 |
fail(listClass + " iterator advanced beyond end"); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
257 |
} catch (NoSuchElementException ignore) { |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
258 |
} |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
259 |
} |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
260 |
} |
efdf6eb85a17
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parents:
diff
changeset
|
261 |
|
efdf6eb85a17
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mduigou
parents:
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|
262 |
@Test(enabled = false) |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
263 |
public void compareForEachPerformance() throws Exception { |
efdf6eb85a17
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264 |
final Integer[] data = new Integer[1000 * 100]; |
efdf6eb85a17
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parents:
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|
265 |
for (int i=0; i < data.length; i++) { |
efdf6eb85a17
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parents:
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|
266 |
data[i] = i; |
efdf6eb85a17
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|
267 |
} |
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parents:
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|
268 |
final List<Integer> source = Arrays.asList(data); |
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parents:
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|
269 |
|
efdf6eb85a17
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parents:
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|
270 |
final String[] iterableCollectionClasses = { |
efdf6eb85a17
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parents:
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|
271 |
"java.util.ArrayList", // warmup, results discarded |
efdf6eb85a17
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mduigou
parents:
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|
272 |
"java.util.ArrayDeque", |
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mduigou
parents:
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changeset
|
273 |
"java.util.ArrayList", |
efdf6eb85a17
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mduigou
parents:
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|
274 |
"java.util.HashSet", |
efdf6eb85a17
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mduigou
parents:
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|
275 |
"java.util.LinkedHashSet", |
efdf6eb85a17
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mduigou
parents:
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changeset
|
276 |
"java.util.LinkedList", |
efdf6eb85a17
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mduigou
parents:
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changeset
|
277 |
"java.util.PriorityQueue", |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
278 |
"java.util.TreeSet", |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
279 |
"java.util.Vector", |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
280 |
"java.util.concurrent.ConcurrentLinkedDeque", |
efdf6eb85a17
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mduigou
parents:
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changeset
|
281 |
"java.util.concurrent.ConcurrentLinkedQueue", |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
282 |
"java.util.concurrent.ConcurrentSkipListSet", |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
283 |
"java.util.concurrent.CopyOnWriteArrayList", |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
284 |
"java.util.concurrent.CopyOnWriteArraySet", |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
285 |
"java.util.concurrent.LinkedBlockingDeque", |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
286 |
"java.util.concurrent.LinkedBlockingQueue", |
efdf6eb85a17
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mduigou
parents:
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changeset
|
287 |
"java.util.concurrent.LinkedTransferQueue", |
efdf6eb85a17
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mduigou
parents:
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changeset
|
288 |
"java.util.concurrent.PriorityBlockingQueue" |
efdf6eb85a17
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parents:
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changeset
|
289 |
}; |
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mduigou
parents:
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changeset
|
290 |
|
efdf6eb85a17
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mduigou
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|
291 |
boolean warmup = true; |
efdf6eb85a17
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parents:
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|
292 |
final int ITERATIONS = 10; |
efdf6eb85a17
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parents:
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|
293 |
final Integer[] target = new Integer[source.size()]; |
efdf6eb85a17
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parents:
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|
294 |
for (final String iterableClass : iterableCollectionClasses) { |
efdf6eb85a17
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parents:
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|
295 |
final Class<? extends Collection<Integer>> type = |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
296 |
(Class<? extends Collection<Integer>>) Class.forName(iterableClass); |
efdf6eb85a17
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mduigou
parents:
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changeset
|
297 |
final Constructor<? extends Collection<Integer>> copyConstructor = |
efdf6eb85a17
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mduigou
parents:
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|
298 |
type.getConstructor(Collection.class); |
efdf6eb85a17
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mduigou
parents:
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changeset
|
299 |
final Iterable<Integer> iterable = copyConstructor.newInstance(source); |
efdf6eb85a17
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parents:
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|
300 |
final Iterable<Integer> reference = |
efdf6eb85a17
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mduigou
parents:
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changeset
|
301 |
Collections.unmodifiableCollection((Collection<Integer>) iterable); |
efdf6eb85a17
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mduigou
parents:
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changeset
|
302 |
|
efdf6eb85a17
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mduigou
parents:
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changeset
|
303 |
for (int i=0; i < ITERATIONS; i++) { |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
304 |
final Iterator<Integer> iterator = reference.iterator(); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
305 |
final long forEachStart = System.nanoTime(); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
306 |
iterator.forEachRemaining(x -> {target[x.intValue()] = x;}); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
307 |
final long forEachEnd = System.nanoTime(); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
308 |
|
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
309 |
final Iterator<Integer> iterator2 = reference.iterator(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
310 |
Integer x; |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
311 |
final long iteratorStart = System.nanoTime(); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
312 |
while (iterator2.hasNext()) { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
313 |
x = iterator2.next(); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
314 |
target[x.intValue()] = x; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
315 |
} |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
316 |
final long iteratorEnd = System.nanoTime(); |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
317 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
318 |
if (warmup) { continue; } // warmup, discard results |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
319 |
final long forEachTime = forEachEnd - forEachStart; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
320 |
final long iteratorTime = iteratorEnd - iteratorStart; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
321 |
final long speedup = iteratorTime - forEachTime; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
322 |
System.out.print(iterableClass); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
323 |
System.out.print(" iterator: "); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
324 |
System.out.print(iteratorTime); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
325 |
System.out.print(", forEach: "); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
326 |
System.out.print(forEachTime); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
327 |
System.out.print(", speedup: "); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
328 |
System.out.print(speedup); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
329 |
System.out.print(" ("); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
330 |
System.out.print((speedup * 100) / iteratorTime); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
331 |
System.out.print("%)\n"); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
332 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
333 |
if (warmup) { warmup = false; } |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
334 |
System.out.println(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
335 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
336 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
337 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
338 |
@Test(enabled = false) |
efdf6eb85a17
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mduigou
parents:
diff
changeset
|
339 |
public void compareSubListForEachPerformance() throws Exception { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
340 |
final Integer[] data = new Integer[1000 * 100]; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
341 |
for (int i = 0; i < data.length; i++) { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
342 |
data[i] = i; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
343 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
344 |
final List<Integer> source = Arrays.asList(data); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
345 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
346 |
final String[] listClasses = { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
347 |
"java.util.ArrayList", // warmup, results discarded |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
348 |
"java.util.ArrayList", |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
349 |
"java.util.LinkedList", |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
350 |
"java.util.Vector", |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
351 |
"java.util.concurrent.CopyOnWriteArrayList" |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
352 |
}; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
353 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
354 |
boolean warmup = true; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
355 |
final int ITERATIONS = 10; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
356 |
final Integer[] target = new Integer[source.size()]; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
357 |
for (final String listClass : listClasses) { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
358 |
final Class<? extends List<Integer >> type = |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
359 |
(Class<? extends List<Integer>>) Class.forName(listClass); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
360 |
final Constructor<? extends List<Integer >> copyConstructor = |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
361 |
type.getConstructor(Collection.class); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
362 |
final List<Integer> iterable = copyConstructor.newInstance(source); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
363 |
final List<Integer> reference = Collections.unmodifiableList(iterable); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
364 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
365 |
for (int i = 0; i < ITERATIONS; i++) { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
366 |
final Iterator<Integer> iterator = reference.subList(42, reference.size() - 37).iterator(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
367 |
final long forEachStart = System.nanoTime(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
368 |
iterator.forEachRemaining(x -> { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
369 |
target[x.intValue()] = x; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
370 |
}); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
371 |
final long forEachEnd = System.nanoTime(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
372 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
373 |
final Iterator<Integer> iterator2 = reference.iterator(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
374 |
Integer x; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
375 |
final long iteratorStart = System.nanoTime(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
376 |
while (iterator2.hasNext()) { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
377 |
x = iterator2.next(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
378 |
target[x.intValue()] = x; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
379 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
380 |
final long iteratorEnd = System.nanoTime(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
381 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
382 |
if (warmup) { continue; } // warmup, discard results |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
383 |
final long forEachTime = forEachEnd - forEachStart; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
384 |
final long iteratorTime = iteratorEnd - iteratorStart; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
385 |
final long speedup = iteratorTime - forEachTime; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
386 |
System.out.print(listClass); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
387 |
System.out.print(" iterator: "); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
388 |
System.out.print(iteratorTime); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
389 |
System.out.print(", forEach: "); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
390 |
System.out.print(forEachTime); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
391 |
System.out.print(", speedup: "); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
392 |
System.out.print(speedup); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
393 |
System.out.print(" ("); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
394 |
System.out.print((speedup * 100) / iteratorTime); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
395 |
System.out.print("%)\n"); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
396 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
397 |
if (warmup) { warmup = false; } |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
398 |
System.out.println(); |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
399 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
400 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
401 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
402 |
static class IteratorWithRemove implements Iterator { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
403 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
404 |
public boolean removed; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
405 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
406 |
IteratorWithRemove() { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
407 |
removed = false; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
408 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
409 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
410 |
@Override |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
411 |
public boolean hasNext() { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
412 |
return false; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
413 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
414 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
415 |
@Override |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
416 |
public Object next() { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
417 |
return null; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
418 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
419 |
|
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
420 |
@Override |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
421 |
public void remove() { |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
422 |
removed = true; |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
423 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
424 |
} |
efdf6eb85a17
8013150: Iterator.remove and forEachRemaining relationship not specified
mduigou
parents:
diff
changeset
|
425 |
} |