12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.util;
27
28 import java.lang.reflect.Array;
29 import java.util.function.BiConsumer;
30 import java.util.function.BiFunction;
31 import java.util.function.Consumer;
32 import jdk.internal.misc.SharedSecrets;
33
34 /**
35 * This class implements the {@code Map} interface with a hash table, using
36 * reference-equality in place of object-equality when comparing keys (and
37 * values). In other words, in an {@code IdentityHashMap}, two keys
38 * {@code k1} and {@code k2} are considered equal if and only if
39 * {@code (k1==k2)}. (In normal {@code Map} implementations (like
40 * {@code HashMap}) two keys {@code k1} and {@code k2} are considered equal
41 * if and only if {@code (k1==null ? k2==null : k1.equals(k2))}.)
42 *
43 * <p><b>This class is <i>not</i> a general-purpose {@code Map}
44 * implementation! While this class implements the {@code Map} interface, it
45 * intentionally violates {@code Map's} general contract, which mandates the
46 * use of the {@code equals} method when comparing objects. This class is
47 * designed for use only in the rare cases wherein reference-equality
48 * semantics are required.</b>
49 *
50 * <p>A typical use of this class is <i>topology-preserving object graph
51 * transformations</i>, such as serialization or deep-copying. To perform such
52 * a transformation, a program must maintain a "node table" that keeps track
|
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.util;
27
28 import java.lang.reflect.Array;
29 import java.util.function.BiConsumer;
30 import java.util.function.BiFunction;
31 import java.util.function.Consumer;
32 import jdk.internal.access.SharedSecrets;
33
34 /**
35 * This class implements the {@code Map} interface with a hash table, using
36 * reference-equality in place of object-equality when comparing keys (and
37 * values). In other words, in an {@code IdentityHashMap}, two keys
38 * {@code k1} and {@code k2} are considered equal if and only if
39 * {@code (k1==k2)}. (In normal {@code Map} implementations (like
40 * {@code HashMap}) two keys {@code k1} and {@code k2} are considered equal
41 * if and only if {@code (k1==null ? k2==null : k1.equals(k2))}.)
42 *
43 * <p><b>This class is <i>not</i> a general-purpose {@code Map}
44 * implementation! While this class implements the {@code Map} interface, it
45 * intentionally violates {@code Map's} general contract, which mandates the
46 * use of the {@code equals} method when comparing objects. This class is
47 * designed for use only in the rare cases wherein reference-equality
48 * semantics are required.</b>
49 *
50 * <p>A typical use of this class is <i>topology-preserving object graph
51 * transformations</i>, such as serialization or deep-copying. To perform such
52 * a transformation, a program must maintain a "node table" that keeps track
|