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 }