1 /* 2 * Copyright (c) 2019, 2022, 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 8235369 8235550 8247444 27 * @summary reflection test for records 28 * @compile RecordReflectionTest.java 29 * @run testng/othervm RecordReflectionTest 30 * @run testng/othervm/java.security.policy=allPermissions.policy RecordReflectionTest 31 */ 32 33 import java.lang.annotation.*; 34 import java.lang.reflect.*; 35 import java.util.List; 36 import org.testng.annotations.*; 37 import static org.testng.Assert.*; 38 39 @Test 40 public class RecordReflectionTest { 41 42 class NoRecord {} 43 44 record R1() {} 45 46 record R2(int i, int j) {} 47 48 record R3(List<String> ls) {} 49 50 record R4(R1 r1, R2 r2, R3 r3) {} 51 52 record R5(String... args) {} 53 54 record R6(long l, String... args) implements java.io.Serializable {} 55 56 record R7(String s1, String s2, String... args) {} 57 58 record R8<A, B>(A a, B b) implements java.io.Serializable { } 59 60 @DataProvider(name = "recordClasses") 61 public Object[][] recordClassData() { 62 return List.of(R1.class, 63 R2.class, 64 R3.class, 65 R4.class, 66 R5.class, 67 R6.class, 68 R7.class, 69 R8.class) 70 .stream().map(c -> new Object[] {c}).toArray(Object[][]::new); 71 } 72 73 @Test(dataProvider = "recordClasses") 74 public void testIsRecord(Class<?> cls) { 75 String message = cls.toGenericString(); 76 assertTrue(cls.isRecord()); 77 assertTrue(cls.getSuperclass() == java.lang.Record.class); 78 assertTrue(cls.getRecordComponents() != null); 79 assertTrue(message.contains("record"), message); 80 } 81 82 @DataProvider(name = "notRecordClasses") 83 public Object[][] notRecordClasses() { 84 return List.of(NoRecord.class, 85 NoRecord[].class, 86 Record.class, // java.lang.Record is not itself a record class 87 Record[].class, 88 byte.class, 89 byte[].class, 90 int.class, 91 int[].class, 92 long.class, 93 long[].class) 94 .stream().map(c -> new Object[] {c}).toArray(Object[][]::new); 95 } 96 97 @Test(dataProvider = "notRecordClasses") 98 public void testNotARecordClass(Class<?> cls) { 99 assertFalse(cls.isRecord()); 100 assertFalse(cls.getSuperclass() == java.lang.Record.class); 101 assertTrue(cls.getRecordComponents() == null); 102 } 103 104 @DataProvider(name = "reflectionData") 105 public Object[][] reflectionData() { 106 return new Object[][] { 107 new Object[] { new R1(), 108 0, 109 null, 110 null, 111 null }, 112 new Object[] { new R2(1, 2), 113 2, 114 new Object[]{ 1, 2 }, 115 new String[]{ "i", "j" }, 116 new String[]{ "int", "int"} }, 117 new Object[] { new R3(List.of("1")), 118 1, 119 new Object[]{ List.of("1") }, 120 new String[]{ "ls" }, 121 new String[]{ "java.util.List<java.lang.String>"} }, 122 new Object[] { new R4(new R1(), new R2(6, 7), new R3(List.of("s"))), 123 3, 124 new Object[]{ new R1(), new R2(6, 7), new R3(List.of("s")) }, 125 new String[]{ "r1", "r2", "r3" }, 126 new String[]{ R1.class.toString(), R2.class.toString(), R3.class.toString()} }, 127 }; 128 } 129 130 @Test(dataProvider = "reflectionData") 131 public void testRecordReflection(Object recordOb, 132 int numberOfComponents, 133 Object[] values, 134 String[] names, 135 String[] signatures) 136 throws ReflectiveOperationException 137 { 138 Class<?> recordClass = recordOb.getClass(); 139 assertTrue(recordClass.isRecord()); 140 RecordComponent[] recordComponents = recordClass.getRecordComponents(); 141 assertEquals(recordComponents.length, numberOfComponents); 142 int i = 0; 143 for (RecordComponent rc : recordComponents) { 144 assertEquals(rc.getName(), names[i]); 145 assertEquals(rc.getType(), rc.getAccessor().getReturnType()); 146 assertEquals(rc.getAccessor().invoke(recordOb), values[i]); 147 assertEquals(rc.getAccessor().getGenericReturnType().toString(), signatures[i], 148 String.format("signature of method \"%s\" different from expected signature \"%s\"", 149 rc.getAccessor().getGenericReturnType(), signatures[i])); 150 i++; 151 } 152 } 153 154 @Retention(RetentionPolicy.RUNTIME) 155 @Target({ ElementType.RECORD_COMPONENT, ElementType.FIELD }) 156 @interface RCA {} 157 158 record AnnotatedRec(@RCA int i) {} 159 160 public void testDeclAnnotationsInRecordComp() throws Throwable { 161 Class<?> recordClass = AnnotatedRec.class; 162 RecordComponent rc = recordClass.getRecordComponents()[0]; 163 Annotation[] annos = rc.getAnnotations(); 164 assertEquals(annos.length, 1); 165 assertEquals(annos[0].toString(), "@RecordReflectionTest.RCA()"); 166 167 Field f = recordClass.getDeclaredField("i"); 168 assertEquals(f.getAnnotations().length, 1); 169 assertEquals(f.getAnnotations()[0].toString(), annos[0].toString()); 170 } 171 172 @Retention(RetentionPolicy.RUNTIME) 173 @Target({ElementType.TYPE_USE}) 174 @interface TYPE_USE {} 175 176 record TypeAnnotatedRec(@TYPE_USE int i) {} 177 178 public void testTypeAnnotationsInRecordComp() throws Throwable { 179 Class<?> recordClass = TypeAnnotatedRec.class; 180 RecordComponent rc = recordClass.getRecordComponents()[0]; 181 AnnotatedType at = rc.getAnnotatedType(); 182 Annotation[] annos = at.getAnnotations(); 183 assertEquals(annos.length, 1); 184 assertEquals(annos[0].toString(), "@RecordReflectionTest.TYPE_USE()"); 185 186 Field f = recordClass.getDeclaredField("i"); 187 assertEquals(f.getAnnotatedType().getAnnotations().length, 1); 188 assertEquals(f.getAnnotatedType().getAnnotations()[0].toString(), annos[0].toString()); 189 } 190 191 public void testReadOnlyFieldInRecord() throws Throwable { 192 R2 o = new R2(1, 2); 193 Class<?> recordClass = R2.class; 194 String fieldName = "i"; 195 Field f = recordClass.getDeclaredField(fieldName); 196 assertTrue(f.trySetAccessible()); 197 assertTrue(f.get(o) != null); 198 try { 199 f.set(o, null); 200 assertTrue(false, "should fail to set " + fieldName); 201 } catch (IllegalAccessException e) { 202 } 203 } 204 205 }