| /* |
| * Copyright (c) 2007, 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 6409434 |
| * @summary Test behavior of nulls in checked collections |
| */ |
| |
| import java.util.*; |
| import static java.util.Collections.*; |
| |
| @SuppressWarnings({"unchecked","serial"}) |
| public class CheckedNull { |
| |
| void test(String[] args) throws Throwable { |
| testCollection(Collections.checkedCollection( |
| new ArrayList<String>(), String.class)); |
| testCollection(Collections.checkedList( |
| new ArrayList<String>(), String.class)); |
| testCollection(Collections.checkedSet( |
| new HashSet<String>(), String.class)); |
| |
| final Comparator nullLow = new Comparator() { |
| public int compare(Object x, Object y) { |
| return x == y ? 0 : |
| x == null ? -1 : |
| y == null ? 1 : |
| ((Comparable)x).compareTo(y); }}; |
| testCollection(Collections.checkedSortedSet( |
| new TreeSet<String>(nullLow), String.class)); |
| |
| testMap(Collections.checkedMap( |
| new HashMap<String, String>(), |
| String.class, String.class)); |
| } |
| |
| ClassCastException cce(F f) { |
| try { f.f(); fail(); return null; } |
| catch (ClassCastException cce) { pass(); return cce; } |
| catch (Throwable t) { unexpected(t); return null; } |
| } |
| |
| void equalCCE(F ... fs) { |
| String detailMessage = null; |
| for (F f : fs) |
| if (detailMessage == null) |
| detailMessage = cce(f).getMessage(); |
| else |
| equal(detailMessage, cce(f).getMessage()); |
| } |
| |
| void add(Collection c, Object o) { |
| int s = c.size(); |
| check(! c.contains(o)); |
| check(c.add(o)); |
| check(c.contains(o)); |
| equal(c.size(), s+1); |
| check(c.remove(o)); |
| check(! c.contains(o)); |
| check(c.addAll(singleton(o))); |
| check(c.contains(o)); |
| equal(c.size(), s+1); |
| check(c.remove(o)); |
| equal(c.size(), s); |
| } |
| |
| void testCollection(final Collection c) { |
| try { |
| check(c.isEmpty()); |
| add(c, null); |
| add(c, "foo"); |
| |
| check(c.add("bar")); |
| add(c, null); |
| add(c, "foo"); |
| |
| equalCCE( |
| new F(){void f(){ c.add(1); }}, |
| new F(){void f(){ c.addAll(singleton(1)); }}); |
| |
| } catch (Throwable t) { unexpected(t); } |
| } |
| |
| void put(Map m, Object k, Object v) { |
| int s = m.size(); |
| check(! m.containsKey(k)); |
| check(! m.containsValue(v)); |
| equal(null, m.put(k, v)); |
| check(m.containsKey(k)); |
| check(m.containsValue(v)); |
| equal(m.size(), s+1); |
| equal(v, m.remove(k)); |
| check(! m.containsKey(k)); |
| check(! m.containsValue(v)); |
| m.putAll(singletonMap(k,v)); |
| check(m.containsKey(k)); |
| check(m.containsValue(v)); |
| equal(m.size(), s+1); |
| equal(v,m.remove(k)); |
| equal(m.size(), s); |
| } |
| |
| void testMap(final Map m) { |
| try { |
| check(m.isEmpty()); |
| |
| put(m, "foo", null); |
| put(m, null, "foo"); |
| put(m, null, null); |
| put(m, "foo", "bar"); |
| |
| m.put("a", "b"); |
| |
| put(m, "foo", null); |
| put(m, null, "foo"); |
| put(m, null, null); |
| put(m, "foo", "bar"); |
| |
| equalCCE( |
| new F(){void f(){ m.put(1, "foo"); }}, |
| new F(){void f(){ m.putAll(singletonMap(1, "foo")); }}); |
| |
| final Collection cheater = new ArrayList() { |
| public boolean contains(Object o) { |
| if (o instanceof Map.Entry) |
| ((Map.Entry)o).setValue(1); |
| return false; }}; |
| |
| equalCCE( |
| new F(){void f(){ m.put("foo", 1); }}, |
| new F(){void f(){ m.putAll(singletonMap("foo", 1)); }}, |
| new F(){void f(){ |
| ((Map.Entry)m.entrySet().iterator().next()).setValue(1); }}, |
| new F(){void f(){ |
| m.entrySet().removeAll(cheater);}}, |
| new F(){void f(){ |
| m.entrySet().retainAll(cheater);}}); |
| |
| equalCCE( |
| new F(){void f(){ m.put(3, 1); }}, |
| new F(){void f(){ m.putAll(singletonMap(3, 1)); }}); |
| |
| equal(m.size(), 1); |
| equal(m.keySet(), singleton("a")); |
| equal(m.entrySet(), |
| singleton(new AbstractMap.SimpleImmutableEntry("a","b"))); |
| |
| } catch (Throwable t) { unexpected(t); } |
| } |
| |
| //--------------------- Infrastructure --------------------------- |
| volatile int passed = 0, failed = 0; |
| void pass() {passed++;} |
| void fail() {failed++; Thread.dumpStack();} |
| void fail(String msg) {System.err.println(msg); fail();} |
| void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| void check(boolean cond) {if (cond) pass(); else fail();} |
| void equal(Object x, Object y) { |
| if (x == null ? y == null : x.equals(y)) pass(); |
| else fail(x + " not equal to " + y);} |
| public static void main(String[] args) throws Throwable { |
| new CheckedNull().instanceMain(args);} |
| void instanceMain(String[] args) throws Throwable { |
| try {test(args);} catch (Throwable t) {unexpected(t);} |
| System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| if (failed > 0) throw new AssertionError("Some tests failed");} |
| abstract class F {abstract void f() throws Throwable;} |
| } |