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 8326879
27 * @summary reflection test for records
28 * @compile RecordReflectionTest.java
29 * @run testng/othervm RecordReflectionTest
30 * @run testng/othervm --enable-preview RecordReflectionTest
31 * @run testng/othervm/java.security.policy=allPermissions.policy RecordReflectionTest
32 */
33
34 import java.lang.annotation.*;
35 import java.lang.reflect.*;
36 import java.util.List;
37 import org.testng.annotations.*;
38 import static org.testng.Assert.*;
39
40 @Test
41 public class RecordReflectionTest {
42
43 class NoRecord {}
44
45 record R1() {}
46
47 record R2(int i, int j) {}
48
49 record R3(List<String> ls) {}
50
51 record R4(R1 r1, R2 r2, R3 r3) {}
52
53 record R5(String... args) {}
54
55 record R6(long l, String... args) implements java.io.Serializable {}
56
57 record R7(String s1, String s2, String... args) {}
58
59 record R8<A, B>(A a, B b) implements java.io.Serializable { }
60
61 @DataProvider(name = "recordClasses")
62 public Object[][] recordClassData() {
63 return List.of(R1.class,
64 R2.class,
65 R3.class,
66 R4.class,
67 R5.class,
68 R6.class,
69 R7.class,
70 R8.class)
71 .stream().map(c -> new Object[] {c}).toArray(Object[][]::new);
72 }
73
74 @Test(dataProvider = "recordClasses")
75 public void testIsRecord(Class<?> cls) {
76 String message = cls.toGenericString();
77 assertTrue(cls.isRecord());
78 assertTrue(cls.getSuperclass() == java.lang.Record.class);
79 assertTrue(cls.getRecordComponents() != null);
80 assertTrue(message.contains("record"), message);
81 }
82
83 @DataProvider(name = "notRecordClasses")
84 public Object[][] notRecordClasses() {
85 return List.of(NoRecord.class,
86 NoRecord[].class,
87 Record.class, // java.lang.Record is not itself a record class
88 Record[].class,
89 byte.class,
90 byte[].class,
91 int.class,
92 int[].class,
93 long.class,
94 long[].class)
95 .stream().map(c -> new Object[] {c}).toArray(Object[][]::new);
96 }
97
98 @Test(dataProvider = "notRecordClasses")
99 public void testNotARecordClass(Class<?> cls) {
100 assertFalse(cls.isRecord());
101 assertFalse(cls.getSuperclass() == java.lang.Record.class);
102 assertTrue(cls.getRecordComponents() == null);
103 }
104
105 @DataProvider(name = "reflectionData")
106 public Object[][] reflectionData() {
107 return new Object[][] {
108 new Object[] { new R1(),
109 0,
110 null,
111 null,
112 null },
113 new Object[] { new R2(1, 2),
114 2,
115 new Object[]{ 1, 2 },
116 new String[]{ "i", "j" },
117 new String[]{ "int", "int"} },
118 new Object[] { new R3(List.of("1")),
119 1,
120 new Object[]{ List.of("1") },
121 new String[]{ "ls" },
122 new String[]{ "java.util.List<java.lang.String>"} },
123 new Object[] { new R4(new R1(), new R2(6, 7), new R3(List.of("s"))),
124 3,
125 new Object[]{ new R1(), new R2(6, 7), new R3(List.of("s")) },
126 new String[]{ "r1", "r2", "r3" },
127 new String[]{ R1.class.toString(), R2.class.toString(), R3.class.toString()} },
128 };
129 }
130
131 @Test(dataProvider = "reflectionData")
132 public void testRecordReflection(Object recordOb,
133 int numberOfComponents,
134 Object[] values,
135 String[] names,
136 String[] signatures)
137 throws ReflectiveOperationException
138 {
139 Class<?> recordClass = recordOb.getClass();
140 assertTrue(recordClass.isRecord());
141 RecordComponent[] recordComponents = recordClass.getRecordComponents();
142 assertEquals(recordComponents.length, numberOfComponents);
143 int i = 0;
144 for (RecordComponent rc : recordComponents) {
145 assertEquals(rc.getName(), names[i]);
146 assertEquals(rc.getType(), rc.getAccessor().getReturnType());
147 assertEquals(rc.getAccessor().invoke(recordOb), values[i]);
148 assertEquals(rc.getAccessor().getGenericReturnType().toString(), signatures[i],
149 String.format("signature of method \"%s\" different from expected signature \"%s\"",
150 rc.getAccessor().getGenericReturnType(), signatures[i]));
151 i++;
152 }
153 }
154
155 @Retention(RetentionPolicy.RUNTIME)
156 @Target({ ElementType.RECORD_COMPONENT, ElementType.FIELD })
157 @interface RCA {}
158
159 record AnnotatedRec(@RCA int i) {}
160
161 public void testDeclAnnotationsInRecordComp() throws Throwable {
162 Class<?> recordClass = AnnotatedRec.class;
163 RecordComponent rc = recordClass.getRecordComponents()[0];
164 Annotation[] annos = rc.getAnnotations();
165 assertEquals(annos.length, 1);
166 assertEquals(annos[0].toString(), "@RecordReflectionTest.RCA()");
167
168 Field f = recordClass.getDeclaredField("i");
169 assertEquals(f.getAnnotations().length, 1);
170 assertEquals(f.getAnnotations()[0].toString(), annos[0].toString());
171 }
172
173 @Retention(RetentionPolicy.RUNTIME)
174 @Target({ElementType.TYPE_USE})
175 @interface TYPE_USE {}
176
177 record TypeAnnotatedRec(@TYPE_USE int i) {}
178
179 public void testTypeAnnotationsInRecordComp() throws Throwable {
180 Class<?> recordClass = TypeAnnotatedRec.class;
181 RecordComponent rc = recordClass.getRecordComponents()[0];
182 AnnotatedType at = rc.getAnnotatedType();
183 Annotation[] annos = at.getAnnotations();
184 assertEquals(annos.length, 1);
185 assertEquals(annos[0].toString(), "@RecordReflectionTest.TYPE_USE()");
186
187 Field f = recordClass.getDeclaredField("i");
188 assertEquals(f.getAnnotatedType().getAnnotations().length, 1);
189 assertEquals(f.getAnnotatedType().getAnnotations()[0].toString(), annos[0].toString());
190 }
191
192 public void testReadOnlyFieldInRecord() throws Throwable {
193 R2 o = new R2(1, 2);
194 Class<?> recordClass = R2.class;
195 String fieldName = "i";
196 Field f = recordClass.getDeclaredField(fieldName);
197 assertTrue(f.trySetAccessible());
198 assertTrue(f.get(o) != null);
199 try {
200 f.set(o, null);
201 assertTrue(false, "should fail to set " + fieldName);
202 } catch (IllegalAccessException e) {
203 }
204 }
205
206 }