11 * This code is distributed in the hope that it will be useful, but WITHOUT
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.lang.invoke;
27
28 import java.lang.constant.ClassDesc;
29 import java.lang.constant.Constable;
30 import java.lang.constant.MethodTypeDesc;
31 import java.lang.ref.Reference;
32 import java.lang.ref.ReferenceQueue;
33 import java.lang.ref.WeakReference;
34 import java.util.Arrays;
35 import java.util.Collections;
36 import java.util.function.Supplier;
37 import java.util.List;
38 import java.util.Map;
39 import java.util.NoSuchElementException;
40 import java.util.Objects;
41 import java.util.Optional;
42 import java.util.StringJoiner;
43 import java.util.concurrent.ConcurrentHashMap;
44 import java.util.concurrent.ConcurrentMap;
45 import java.util.stream.Stream;
46
47 import jdk.internal.util.ReferencedKeySet;
48 import jdk.internal.util.ReferenceKey;
49 import jdk.internal.vm.annotation.Stable;
50 import sun.invoke.util.BytecodeDescriptor;
51 import sun.invoke.util.VerifyType;
52 import sun.invoke.util.Wrapper;
53 import sun.security.util.SecurityConstants;
54
55 import static java.lang.invoke.MethodHandleStatics.UNSAFE;
56 import static java.lang.invoke.MethodHandleStatics.newIllegalArgumentException;
57
58 /**
59 * A method type represents the arguments and return type accepted and
60 * returned by a method handle, or the arguments and return type passed
61 * and expected by a method handle caller. Method types must be properly
62 * matched between a method handle and all its callers,
63 * and the JVM's operations enforce this matching at, specifically
64 * during calls to {@link MethodHandle#invokeExact MethodHandle.invokeExact}
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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.lang.invoke;
27
28 import java.lang.constant.ClassDesc;
29 import java.lang.constant.Constable;
30 import java.lang.constant.MethodTypeDesc;
31 import java.util.Arrays;
32 import java.util.Collections;
33 import java.util.function.Supplier;
34 import java.util.List;
35 import java.util.Map;
36 import java.util.NoSuchElementException;
37 import java.util.Objects;
38 import java.util.Optional;
39 import java.util.StringJoiner;
40 import java.util.concurrent.ConcurrentHashMap;
41 import java.util.stream.Stream;
42
43 import jdk.internal.util.ReferencedKeySet;
44 import jdk.internal.util.ReferenceKey;
45 import jdk.internal.vm.annotation.Stable;
46 import sun.invoke.util.BytecodeDescriptor;
47 import sun.invoke.util.VerifyType;
48 import sun.invoke.util.Wrapper;
49 import sun.security.util.SecurityConstants;
50
51 import static java.lang.invoke.MethodHandleStatics.UNSAFE;
52 import static java.lang.invoke.MethodHandleStatics.newIllegalArgumentException;
53
54 /**
55 * A method type represents the arguments and return type accepted and
56 * returned by a method handle, or the arguments and return type passed
57 * and expected by a method handle caller. Method types must be properly
58 * matched between a method handle and all its callers,
59 * and the JVM's operations enforce this matching at, specifically
60 * during calls to {@link MethodHandle#invokeExact MethodHandle.invokeExact}
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