1 /*

     2  * Copyright (c) 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug 5043030

    27  * @summary Verify that the method java.lang.reflect.Method.invoke(Object, Object...)

    28  *          makes use of the same caching mechanism as used for autoboxing

    29  *          when wrapping returned values of the primitive types.

    30  * @author Andrej Golovnin

    31  * @run main/othervm -Dsun.reflect.noInflation=true TestMethodReflectValueOf

    32  * @run main/othervm -Dsun.reflect.noInflation=false -Dsun.reflect.inflationThreshold=500 TestMethodReflectValueOf

    33  */

    34 

    35 import java.lang.reflect.InvocationTargetException;

    36 import java.lang.reflect.Method;

    37 

    38 

    39 public class TestMethodReflectValueOf {

    40 

    41     public static void main(String[] args) {

    42         // When the inflation is disabled we compare values using "=="

    43         // as the returned values of the primitive types should be cached

    44         // by the same mechanism as used for autoboxing. When the inflation

    45         // is enabled we use "equals()"-method to compare values as the native

    46         // code still creates new instances to wrap values of the primitive

    47         // types.

    48         boolean checkIdentity = Boolean.getBoolean("sun.reflect.noInflation");

    49 

    50         // Boolean#valueOf test

    51         testMethod(Boolean.TYPE, Boolean.FALSE, checkIdentity);

    52         testMethod(Boolean.TYPE, Boolean.TRUE, checkIdentity);

    53 

    54         // Byte#valueOf test

    55         for (int b = Byte.MIN_VALUE; b < (Byte.MAX_VALUE + 1); b++) {

    56             testMethod(Byte.TYPE, Byte.valueOf((byte) b), checkIdentity);

    57         }

    58 

    59         // Character#valueOf test

    60         for (char c = '\u0000'; c <= '\u007F'; c++) {

    61             testMethod(Character.TYPE, Character.valueOf(c), checkIdentity);

    62         }

    63 

    64         // Integer#valueOf test

    65         for (int i = -128; i <= 127; i++) {

    66             testMethod(Integer.TYPE, Integer.valueOf(i), checkIdentity);

    67         }

    68 

    69         // Long#valueOf test

    70         for (long l = -128L; l <= 127L; l++) {

    71             testMethod(Long.TYPE, Long.valueOf(l), checkIdentity);

    72         }

    73 

    74         // Short#valueOf test

    75         for (short s = -128; s <= 127; s++) {

    76             testMethod(Short.TYPE, Short.valueOf(s), checkIdentity);

    77         }

    78     }

    79 

    80     public static void testMethod(Class<?> primType, Object wrappedValue,

    81             boolean checkIdentity)

    82     {

    83         String methodName = primType.getName() + "Method";

    84         try {

    85             Method method = TestMethodReflectValueOf.class.getMethod(methodName, primType);

    86             Object result = method.invoke(new TestMethodReflectValueOf(), wrappedValue);

    87             if (checkIdentity) {

    88                 if (result != wrappedValue) {

    89                     throw new RuntimeException("The value " + wrappedValue

    90                         + " is not cached for the type " + primType);

    91                 }

    92             } else {

    93                 if (!result.equals(wrappedValue)) {

    94                     throw new RuntimeException("The result value " + result

    95                         + " is not equal to the expected value "

    96                         + wrappedValue + " for the type " + primType);

    97                 }

    98             }

    99         } catch (  NoSuchMethodException | SecurityException

   100                  | IllegalAccessException | IllegalArgumentException

   101                  | InvocationTargetException e)

   102         {

   103             throw new RuntimeException(e);

   104         }

   105     }

   106 

   107     public int intMethod(int value) {

   108         return value;

   109     }

   110 

   111     public long longMethod(long value) {

   112         return value;

   113     }

   114 

   115     public short shortMethod(short value) {

   116         return value;

   117     }

   118 

   119     public byte byteMethod(byte value) {

   120         return value;

   121     }

   122 

   123     public char charMethod(char value) {

   124         return value;

   125     }

   126 

   127     public boolean booleanMethod(boolean value) {

   128         return value;

   129     }

   130 

   131 }