1 /* 2 * Copyright (c) 2013, 2016, 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 6298888 6992705 8161500 6304578 27 * @summary Check Class.toGenericString() 28 * @author Joseph D. Darcy 29 */ 30 31 import java.lang.reflect.*; 32 import java.lang.annotation.*; 33 import java.util.*; 34 35 @ExpectedGenericString("public class GenericStringTest") 36 public class GenericStringTest { 37 public Map<String, Integer>[] mixed = null; 38 public Map<String, Integer>[][] mixed2 = null; 39 40 public static void main(String... args) throws ReflectiveOperationException { 41 int failures = 0; 42 43 String[][] nested = {{""}}; 44 int[][] intArray = {{1}}; 45 46 Map<Class<?>, String> testCases = 47 Map.of(int.class, "int", 48 void.class, "void", 49 args.getClass(), "java.lang.String[]", 50 nested.getClass(), "java.lang.String[][]", 51 intArray.getClass(), "int[][]", 52 java.lang.Enum.class, "public abstract class java.lang.Enum<E extends java.lang.Enum<E>>", 53 java.util.Map.class, "public abstract interface java.util.Map<K,V>", 54 java.util.EnumMap.class, "public class java.util.EnumMap<K extends java.lang.Enum<K>,V>", 55 java.util.EventListenerProxy.class, "public abstract class java.util.EventListenerProxy<T extends java.util.EventListener>"); 56 57 for (Map.Entry<Class<?>, String> testCase : testCases.entrySet()) { 58 failures += checkToGenericString(testCase.getKey(), testCase.getValue()); 59 } 60 61 Field f = GenericStringTest.class.getDeclaredField("mixed"); 62 // The expected value includes "<K,V>" rather than 63 // "<...String,...Integer>" since the Class object rather than 64 // Type objects is being queried. 65 failures += checkToGenericString(f.getType(), "java.util.Map<K,V>[]"); 66 f = GenericStringTest.class.getDeclaredField("mixed2"); 67 failures += checkToGenericString(f.getType(), "java.util.Map<K,V>[][]"); 68 69 for(Class<?> clazz : List.of(GenericStringTest.class, 70 AnInterface.class, 71 LocalMap.class, 72 AnEnum.class, 73 AnotherEnum.class)) { 74 failures += checkToGenericString(clazz, clazz.getAnnotation(ExpectedGenericString.class).value()); 75 } 76 77 if (failures > 0) { 78 throw new RuntimeException(); 79 } 80 } 81 82 private static int checkToGenericString(Class<?> clazz, String expected) { 83 String genericString = clazz.toGenericString(); 84 if (!genericString.equals(expected)) { 85 System.err.printf("Unexpected Class.toGenericString output; expected %n\t'%s',%n got %n\t'%s'.%n", 86 expected, 87 genericString); 88 return 1; 89 } else 90 return 0; 91 } 92 } 93 94 @Retention(RetentionPolicy.RUNTIME) 95 @interface ExpectedGenericString { 96 String value(); 97 } 98 99 @ExpectedGenericString("abstract interface AnInterface") 100 strictfp interface AnInterface {} 101 102 @ExpectedGenericString("abstract interface LocalMap<K,V>") 103 interface LocalMap<K,V> {} 104 105 @ExpectedGenericString("final enum AnEnum") 106 enum AnEnum { 107 FOO; 108 } 109 110 @ExpectedGenericString("enum AnotherEnum") 111 enum AnotherEnum { 112 BAR{}; 113 }