| /* |
| * Copyright (c) 2014, 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 5043030 |
| * @summary Verify that the method java.lang.reflect.Field.get(Object) makes |
| * use of the same caching mechanism as used for autoboxing |
| * when wrapping values of the primitive types. |
| * @author Andrej Golovnin |
| */ |
| |
| import java.lang.reflect.Field; |
| |
| public class TestFieldReflectValueOf { |
| |
| @SuppressWarnings("unused") |
| private static boolean booleanStaticField; |
| @SuppressWarnings("unused") |
| private static byte byteStaticField; |
| @SuppressWarnings("unused") |
| private static char charStaticField; |
| @SuppressWarnings("unused") |
| private static int intStaticField; |
| @SuppressWarnings("unused") |
| private static long longStaticField; |
| @SuppressWarnings("unused") |
| private static short shortStaticField; |
| |
| @SuppressWarnings("unused") |
| private static volatile boolean booleanStaticVolatileField; |
| @SuppressWarnings("unused") |
| private static volatile byte byteStaticVolatileField; |
| @SuppressWarnings("unused") |
| private static volatile char charStaticVolatileField; |
| @SuppressWarnings("unused") |
| private static volatile int intStaticVolatileField; |
| @SuppressWarnings("unused") |
| private static volatile long longStaticVolatileField; |
| @SuppressWarnings("unused") |
| private static volatile short shortStaticVolatileField; |
| |
| @SuppressWarnings("unused") |
| private boolean booleanField; |
| @SuppressWarnings("unused") |
| private byte byteField; |
| @SuppressWarnings("unused") |
| private char charField; |
| @SuppressWarnings("unused") |
| private int intField; |
| @SuppressWarnings("unused") |
| private long longField; |
| @SuppressWarnings("unused") |
| private short shortField; |
| |
| @SuppressWarnings("unused") |
| private volatile boolean booleanVolatileField; |
| @SuppressWarnings("unused") |
| private volatile byte byteVolatileField; |
| @SuppressWarnings("unused") |
| private volatile char charVolatileField; |
| @SuppressWarnings("unused") |
| private volatile int intVolatileField; |
| @SuppressWarnings("unused") |
| private volatile long longVolatileField; |
| @SuppressWarnings("unused") |
| private volatile short shortVolatileField; |
| |
| public static void main(String[] args) { |
| testUnsafeStaticFieldAccessors(); |
| testUnsafeQualifiedStaticFieldAccessors(); |
| testUnsafeFieldAccessors(); |
| testUnsafeQualifiedFieldAccessors(); |
| } |
| |
| private static void testUnsafeStaticFieldAccessors() { |
| testFieldAccessors(true, false); |
| } |
| |
| private static void testUnsafeQualifiedStaticFieldAccessors() { |
| testFieldAccessors(true, true); |
| } |
| |
| private static void testUnsafeFieldAccessors() { |
| testFieldAccessors(false, false); |
| } |
| |
| private static void testUnsafeQualifiedFieldAccessors() { |
| testFieldAccessors(false, true); |
| } |
| |
| private static void testFieldAccessors(boolean checkStatic, |
| boolean checkVolatile) |
| { |
| // Boolean#valueOf test |
| testField(Boolean.TYPE, Boolean.FALSE, checkStatic, checkVolatile); |
| testField(Boolean.TYPE, Boolean.TRUE, checkStatic, checkVolatile); |
| |
| // Byte#valueOf test |
| for (int b = Byte.MIN_VALUE; b < (Byte.MAX_VALUE + 1); b++) { |
| testField(Byte.TYPE, Byte.valueOf((byte) b), checkStatic, checkVolatile); |
| } |
| |
| // Character#valueOf test |
| for (char c = '\u0000'; c <= '\u007F'; c++) { |
| testField(Character.TYPE, Character.valueOf(c), checkStatic, checkVolatile); |
| } |
| |
| // Integer#valueOf test |
| for (int i = -128; i <= 127; i++) { |
| testField(Integer.TYPE, Integer.valueOf(i), checkStatic, checkVolatile); |
| } |
| |
| // Long#valueOf test |
| for (long l = -128L; l <= 127L; l++) { |
| testField(Long.TYPE, Long.valueOf(l), checkStatic, checkVolatile); |
| } |
| |
| // Short#valueOf test |
| for (short s = -128; s <= 127; s++) { |
| testField(Short.TYPE, Short.valueOf(s), checkStatic, checkVolatile); |
| } |
| } |
| |
| private static void testField(Class<?> primType, Object wrappedValue, |
| boolean checkStatic, boolean checkVolatile) |
| { |
| String fieldName = primType.getName(); |
| if (checkStatic) { |
| fieldName += "Static"; |
| } |
| if (checkVolatile) { |
| fieldName += "Volatile"; |
| } |
| fieldName += "Field"; |
| try { |
| Field field = TestFieldReflectValueOf.class.getDeclaredField(fieldName); |
| field.setAccessible(true); |
| TestFieldReflectValueOf obj = new TestFieldReflectValueOf(); |
| field.set(obj, wrappedValue); |
| Object result = field.get(obj); |
| if (result != wrappedValue) { |
| throw new RuntimeException("The value " + wrappedValue |
| + " is not cached for the type " + primType); |
| } |
| } catch ( NoSuchFieldException | SecurityException |
| | IllegalAccessException | IllegalArgumentException e) |
| { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| } |