| 1 |
/* |
| 2 |
* Copyright 2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 |
* |
| 5 |
* This code is free software; you can redistribute it and/or modify it |
| 6 |
* under the terms of the GNU General Public License version 2 only, as |
| 7 |
* published by the Free Software Foundation. |
| 8 |
* |
| 9 |
* This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 |
* version 2 for more details (a copy is included in the LICENSE file that |
| 13 |
* accompanied this code). |
| 14 |
* |
| 15 |
* You should have received a copy of the GNU General Public License version |
| 16 |
* 2 along with this work; if not, write to the Free Software Foundation, |
| 17 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 |
* |
| 19 |
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 |
* CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 |
* have any questions. |
| 22 |
*/ |
| 23 |
|
| 24 |
/* |
| 25 |
* @test |
| 26 |
* @bug 6409434 |
| 27 |
* @summary Test behavior of nulls in checked collections |
| 28 |
*/ |
| 29 |
|
| 30 |
import java.util.*; |
| 31 |
import static java.util.Collections.*; |
| 32 |
|
| 33 |
@SuppressWarnings({"unchecked","serial"}) |
| 34 |
public class CheckedNull { |
| 35 |
|
| 36 |
void test(String[] args) throws Throwable { |
| 37 |
testCollection(Collections.checkedCollection( |
| 38 |
new ArrayList<String>(), String.class)); |
| 39 |
testCollection(Collections.checkedList( |
| 40 |
new ArrayList<String>(), String.class)); |
| 41 |
testCollection(Collections.checkedSet( |
| 42 |
new HashSet<String>(), String.class)); |
| 43 |
|
| 44 |
final Comparator nullLow = new Comparator() { |
| 45 |
public int compare(Object x, Object y) { |
| 46 |
return x == y ? 0 : |
| 47 |
x == null ? -1 : |
| 48 |
y == null ? 1 : |
| 49 |
((Comparable)x).compareTo(y); }}; |
| 50 |
testCollection(Collections.checkedSortedSet( |
| 51 |
new TreeSet<String>(nullLow), String.class)); |
| 52 |
|
| 53 |
testMap(Collections.checkedMap( |
| 54 |
new HashMap<String, String>(), |
| 55 |
String.class, String.class));; |
| 56 |
} |
| 57 |
|
| 58 |
ClassCastException cce(F f) { |
| 59 |
try { f.f(); fail(); return null; } |
| 60 |
catch (ClassCastException cce) { pass(); return cce; } |
| 61 |
catch (Throwable t) { unexpected(t); return null; } |
| 62 |
} |
| 63 |
|
| 64 |
void equalCCE(F ... fs) { |
| 65 |
String detailMessage = null; |
| 66 |
for (F f : fs) |
| 67 |
if (detailMessage == null) |
| 68 |
detailMessage = cce(f).getMessage(); |
| 69 |
else |
| 70 |
equal(detailMessage, cce(f).getMessage()); |
| 71 |
} |
| 72 |
|
| 73 |
void add(Collection c, Object o) { |
| 74 |
int s = c.size(); |
| 75 |
check(! c.contains(o)); |
| 76 |
check(c.add(o)); |
| 77 |
check(c.contains(o)); |
| 78 |
equal(c.size(), s+1); |
| 79 |
check(c.remove(o)); |
| 80 |
check(! c.contains(o)); |
| 81 |
check(c.addAll(singleton(o))); |
| 82 |
check(c.contains(o)); |
| 83 |
equal(c.size(), s+1); |
| 84 |
check(c.remove(o)); |
| 85 |
equal(c.size(), s); |
| 86 |
} |
| 87 |
|
| 88 |
void testCollection(final Collection c) { |
| 89 |
try { |
| 90 |
check(c.isEmpty()); |
| 91 |
add(c, null); |
| 92 |
add(c, "foo"); |
| 93 |
|
| 94 |
check(c.add("bar")); |
| 95 |
add(c, null); |
| 96 |
add(c, "foo"); |
| 97 |
|
| 98 |
equalCCE( |
| 99 |
new F(){void f(){ c.add(1); }}, |
| 100 |
new F(){void f(){ c.addAll(singleton(1)); }}); |
| 101 |
|
| 102 |
} catch (Throwable t) { unexpected(t); } |
| 103 |
} |
| 104 |
|
| 105 |
void put(Map m, Object k, Object v) { |
| 106 |
int s = m.size(); |
| 107 |
check(! m.containsKey(k)); |
| 108 |
check(! m.containsValue(v)); |
| 109 |
equal(null, m.put(k, v)); |
| 110 |
check(m.containsKey(k)); |
| 111 |
check(m.containsValue(v)); |
| 112 |
equal(m.size(), s+1); |
| 113 |
equal(v, m.remove(k)); |
| 114 |
check(! m.containsKey(k)); |
| 115 |
check(! m.containsValue(v)); |
| 116 |
m.putAll(singletonMap(k,v)); |
| 117 |
check(m.containsKey(k)); |
| 118 |
check(m.containsValue(v)); |
| 119 |
equal(m.size(), s+1); |
| 120 |
equal(v,m.remove(k)); |
| 121 |
equal(m.size(), s); |
| 122 |
} |
| 123 |
|
| 124 |
void testMap(final Map m) { |
| 125 |
try { |
| 126 |
check(m.isEmpty()); |
| 127 |
|
| 128 |
put(m, "foo", null); |
| 129 |
put(m, null, "foo"); |
| 130 |
put(m, null, null); |
| 131 |
put(m, "foo", "bar"); |
| 132 |
|
| 133 |
m.put("a", "b"); |
| 134 |
|
| 135 |
put(m, "foo", null); |
| 136 |
put(m, null, "foo"); |
| 137 |
put(m, null, null); |
| 138 |
put(m, "foo", "bar"); |
| 139 |
|
| 140 |
equalCCE( |
| 141 |
new F(){void f(){ m.put(1, "foo"); }}, |
| 142 |
new F(){void f(){ m.putAll(singletonMap(1, "foo")); }}); |
| 143 |
|
| 144 |
final Collection cheater = new ArrayList() { |
| 145 |
public boolean contains(Object o) { |
| 146 |
if (o instanceof Map.Entry) |
| 147 |
((Map.Entry)o).setValue(1); |
| 148 |
return false; }}; |
| 149 |
|
| 150 |
equalCCE( |
| 151 |
new F(){void f(){ m.put("foo", 1); }}, |
| 152 |
new F(){void f(){ m.putAll(singletonMap("foo", 1)); }}, |
| 153 |
new F(){void f(){ |
| 154 |
((Map.Entry)m.entrySet().iterator().next()).setValue(1); }}, |
| 155 |
new F(){void f(){ |
| 156 |
m.entrySet().removeAll(cheater);}}, |
| 157 |
new F(){void f(){ |
| 158 |
m.entrySet().retainAll(cheater);}}); |
| 159 |
|
| 160 |
equalCCE( |
| 161 |
new F(){void f(){ m.put(3, 1); }}, |
| 162 |
new F(){void f(){ m.putAll(singletonMap(3, 1)); }}); |
| 163 |
|
| 164 |
equal(m.size(), 1); |
| 165 |
equal(m.keySet(), singleton("a")); |
| 166 |
equal(m.entrySet(), |
| 167 |
singleton(new AbstractMap.SimpleImmutableEntry("a","b"))); |
| 168 |
|
| 169 |
} catch (Throwable t) { unexpected(t); } |
| 170 |
} |
| 171 |
|
| 172 |
//--------------------- Infrastructure --------------------------- |
| 173 |
volatile int passed = 0, failed = 0; |
| 174 |
void pass() {passed++;} |
| 175 |
void fail() {failed++; Thread.dumpStack();} |
| 176 |
void fail(String msg) {System.err.println(msg); fail();} |
| 177 |
void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| 178 |
void check(boolean cond) {if (cond) pass(); else fail();} |
| 179 |
void equal(Object x, Object y) { |
| 180 |
if (x == null ? y == null : x.equals(y)) pass(); |
| 181 |
else fail(x + " not equal to " + y);} |
| 182 |
public static void main(String[] args) throws Throwable { |
| 183 |
new CheckedNull().instanceMain(args);} |
| 184 |
void instanceMain(String[] args) throws Throwable { |
| 185 |
try {test(args);} catch (Throwable t) {unexpected(t);} |
| 186 |
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| 187 |
if (failed > 0) throw new AssertionError("Some tests failed");} |
| 188 |
abstract class F {abstract void f() throws Throwable;} |
| 189 |
} |
