Boxing.java revision 2495:7526d0b9aab0
1/* 2 * Copyright (c) 2003, 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/* @test 25 * @bug 4889342 26 * @summary This test verifies that when a primitive boolean value is 27 * passed by a dynamic proxy class to an invocation handler, it is 28 * boxed as one of the canonical Boolean instances (Boolean.TRUE or 29 * Boolean.FALSE). This test also exercises a dynamic proxy class's 30 * boxing of all primitive types. 31 * @author Peter Jones 32 * 33 * @run main Boxing 34 */ 35 36import java.lang.reflect.InvocationHandler; 37import java.lang.reflect.Method; 38import java.lang.reflect.Proxy; 39import java.util.Random; 40 41public class Boxing { 42 43 private interface Test { 44 void m(byte b, 45 char c, 46 double d, 47 float f, 48 int i, 49 long j, 50 short s, 51 boolean z); 52 } 53 54 private static final int REPS = 100000; 55 56 private byte b; 57 private char c; 58 private double d; 59 private float f; 60 private int i; 61 private long j; 62 private short s; 63 private boolean z; 64 65 public static void main(String[] args) { 66 (new Boxing()).run(); 67 System.err.println("TEST PASSED"); 68 } 69 70 private void run() { 71 Random random = new Random(42); // ensure consistent test domain 72 73 Test proxy = (Test) Proxy.newProxyInstance( 74 Test.class.getClassLoader(), 75 new Class<?>[] { Test.class }, 76 new TestHandler()); 77 78 for (int rep = 0; rep < REPS; rep++) { 79 b = (byte) random.nextInt(); 80 c = (char) random.nextInt(); 81 d = random.nextDouble(); 82 f = random.nextFloat(); 83 i = random.nextInt(); 84 j = random.nextLong(); 85 s = (short) random.nextInt(); 86 z = random.nextBoolean(); 87 proxy.m(b,c,d,f,i,j,s,z); 88 } 89 } 90 91 private class TestHandler implements InvocationHandler { 92 public Object invoke(Object proxy, Method method, Object[] args) 93 throws Throwable 94 { 95 if (!method.getName().equals("m")) { 96 throw new AssertionError(); 97 } 98 99 byte b2 = ((Byte) args[0]).byteValue(); 100 if (b2 != b) { 101 throw new RuntimeException("TEST FAILED: " + 102 "wrong byte, expected " + b + " but got " + b2); 103 } 104 105 char c2 = ((Character) args[1]).charValue(); 106 if (c2 != c) { 107 throw new RuntimeException("TEST FAILED: " + 108 "wrong char, expected " + c + " but got " + c2); 109 } 110 111 double d2 = ((Double) args[2]).doubleValue(); 112 if (d2 != d) { 113 throw new RuntimeException("TEST FAILED: " + 114 "wrong double, expected " + d + " but got " + d2); 115 } 116 117 float f2 = ((Float) args[3]).floatValue(); 118 if (f2 != f) { 119 throw new RuntimeException("TEST FAILED: " + 120 "wrong float, expected " + f + " but got " + f2); 121 } 122 123 int i2 = ((Integer) args[4]).intValue(); 124 if (i2 != i) { 125 throw new RuntimeException("TEST FAILED: " + 126 "wrong int, expected " + i + " but got " + i2); 127 } 128 129 long j2 = ((Long) args[5]).longValue(); 130 if (j2 != j) { 131 throw new RuntimeException("TEST FAILED: " + 132 "wrong long, expected " + j + " but got " + j2); 133 } 134 135 short s2 = ((Short) args[6]).shortValue(); 136 if (s2 != s) { 137 throw new RuntimeException("TEST FAILED: " + 138 "wrong short, expected " + s + " but got " + s2); 139 } 140 141 Boolean Z = Boolean.valueOf(z); 142 Boolean Z2 = (Boolean) args[7]; 143 if (Z2 != Z) { 144 throw new RuntimeException("TEST FAILED: " + 145 "wrong Boolean instance, expected " + 146 identityToString(Z) + " but got " + identityToString(Z2)); 147 } 148 149 return null; 150 } 151 } 152 153 private static String identityToString(Object obj) { 154 return obj.toString() + "@" + System.identityHashCode(obj); 155 } 156} 157