1 /*
2 * Copyright (c) 2017, 2018, 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 /*
26 * @test
27 * @summary test reflection on inline types
28 * @compile -XDallowWithFieldOperator Point.java Line.java NonFlattenValue.java
29 * @run main/othervm -XX:+EnableValhalla Reflection
30 */
31
32 import java.lang.reflect.Array;
33 import java.lang.reflect.Constructor;
34 import java.lang.reflect.Field;
35 import java.lang.reflect.InaccessibleObjectException;
36 import java.lang.reflect.Method;
37
38 public class Reflection {
39 public static void main(String... args) throws Exception {
40 testPointClass();
41 testLineClass();
42 testNonFlattenValue();
43 testMirrors();
44 testClassName();
45 }
46
47 static void testPointClass() throws Exception {
48 Point o = Point.makePoint(10, 20);
49 Reflection test = new Reflection(Point.class, "Point", o);
50 test.newInstance();
51 test.constructor();
52 test.accessFieldX(o.x);
53 test.staticField();
54 }
55
56 static void testLineClass() throws Exception {
57 Line l = Line.makeLine(10, 20, 30, 40);
58 Reflection test = new Reflection(Line.class, "Line", l);
59 test.checkField("public final Point Line.p1", "p1", Point.class);
60 test.checkField("public final Point Line.p2", "p2", Point.class);
61 test.checkMethod("public Point Line.p1()", "p1", Point.class);
62 test.checkMethod("public Point Line.p2()", "p2", Point.class);
63 }
64
65 static void testNonFlattenValue() throws Exception {
66 NonFlattenValue nfv = NonFlattenValue.make(10, 20);
67 Reflection test = new Reflection(NonFlattenValue.class, "NonFlattenValue", nfv);
68 test.checkField("final Point? NonFlattenValue.nfp", "nfp", Point.class.asNullableType());
69 test.checkMethod("public Point NonFlattenValue.pointValue()", "pointValue", Point.class);
70 test.checkMethod("public Point? NonFlattenValue.point()", "point", Point.class.asNullableType());
71 test.checkMethod("public boolean NonFlattenValue.has(Point,Point?)", "has", boolean.class, Point.class, Point.class.asNullableType());
72 }
73
74 /*
75 * Tests reflection APIs with the primary and nullable mirror
76 */
77 static void testMirrors() throws Exception {
78 Class<?> primary = Point.class;
79 Class<?> nullable = Point.class.asNullableType();
80
81 assertEquals(primary, Point.class);
82 assertTrue(primary.isInlineClass());
83 assertTrue(nullable.isInlineClass());
84
85 Point o = Point.makePoint(10, 20);
86 assertTrue(primary.isInstance(o));
87 assertTrue(nullable.isInstance(o));
88
89 // V <: V? and V <: Object
90 assertTrue(nullable.isAssignableFrom(primary));
91 assertTrue(Object.class.isAssignableFrom(primary));
92 assertFalse(primary.isAssignableFrom(nullable));
93 assertTrue(Object.class.isAssignableFrom(nullable));
94
95 assertEquals(primary, primary.asSubclass(nullable));
96 try {
97 Class<?> c = nullable.asSubclass(primary);
98 assertTrue(false);
99 } catch (ClassCastException e) { }
100 }
101
102 static void testClassName() {
103 assertEquals(Point.class.getName(), "Point");
104 assertEquals(Point.class.asNullableType().getName(), "Point");
105 assertEquals(Line.class.getName(), "Line");
106 assertEquals((new Point[0]).getClass().getName(), "[QPoint;");
107 assertEquals((new Point?[0][0]).getClass().getName(), "[[LPoint;");
108 }
109
110 private final Class<?> c;
111 private final Constructor<?> ctor;
112 private final Object o;
113 Reflection(Class<?> type, String cn, Object o) throws Exception {
114 this.c = Class.forName(cn);
115 if (!c.isInlineClass() || c != type) {
116 throw new RuntimeException(cn + " is not an inline class");
117 }
118
119 // V.class, Class.forName, and the type of the object return the primary mirror
120 assertEquals(type, o.getClass());
121 assertEquals(type, c.asPrimaryType());
122 assertEquals(c, c.asPrimaryType());
123
124 this.ctor = c.getDeclaredConstructor();
125 this.o = o;
126
127
128 // test the primary mirror and secondary mirror
129 testMirrors(this.c);
130 // test array of Q-type and L-type
131 testArray(c.asPrimaryType());
132 testArray(c.asNullableType());
133 }
134
135 private static void testMirrors(Class<?> c) {
136 Class<?> inlineType = c.asPrimaryType();
137 Class<?> nullableType = c.asNullableType();
138
139 assertTrue(inlineType != null);
140 assertEquals(nullableType.getTypeName(), c.getTypeName() + "?");
141
142 assertEquals(nullableType.getName(), inlineType.getName());
143 assertEquals(nullableType.getTypeName(), inlineType.getTypeName() + "?");
144 assertEquals(inlineType.asNullableType(), nullableType);
145 assertEquals(nullableType.asPrimaryType(), inlineType);
146 }
147
148 void testArray(Class<?> elementType) {
149 Object[] array = (Object[])Array.newInstance(elementType, 1);
150 Class<?> arrayType = array.getClass();
151 assertTrue(arrayType.isArray());
152 Class<?> componentType = arrayType.getComponentType();
153 assertTrue(componentType.isInlineClass());
154 assertEquals(componentType, elementType);
155 // Array is a reference type
156 assertEquals(arrayType.asNullableType(), arrayType);
157 if (array[0] == null) {
158 System.out.println("array[0] = null");
159 } else {
160 System.out.println("array[0] = " + array[0]);
161 }
162 }
163
164 void accessFieldX(int x) throws Exception {
165 Field field = c.getField("x");
166 if (field.getInt(o) != x) {
167 throw new RuntimeException("Unexpected Point.x value: " + field.getInt(o));
168 }
169
170 try {
171 field.setInt(o, 100);
172 throw new RuntimeException("IllegalAccessException not thrown");
173 } catch (IllegalAccessException e) {}
174 }
175
176 @SuppressWarnings("deprecation")
177 void newInstance() throws Exception {
178 Object o = c.newInstance();
179 assertEquals(o.getClass(), c);
180 }
181
182 void constructor() throws Exception {
183 Object o = ctor.newInstance();
184 assertEquals(o.getClass(), c);
185 }
186
187 void staticField() throws Exception {
188 Field f = c.getDeclaredField("STATIC_FIELD");
189 if (f.trySetAccessible()) {
190 throw new RuntimeException("trySetAccessible should not succeed");
191 }
192 try {
193 f.setAccessible(true);
194 throw new RuntimeException("IllegalAccessException not thrown");
195 } catch (InaccessibleObjectException e) { }
196 }
197
198 void checkField(String source, String name, Class<?> type) throws Exception {
199 Field f = c.getDeclaredField(name);
200 assertEquals(f.getType(), type);
201 assertEquals(f.toString(), source);
202 }
203
204 void checkMethod(String source, String name, Class<?> returnType, Class<?>... params) throws Exception {
205 Method m = c.getDeclaredMethod(name, params);
206 assertEquals(m.toString(), source);
207 }
208
209 static void assertEquals(Object o1, Object o2) {
210 if (o1 == o2 || o1.equals(o2))
211 return;
212
213 throw new AssertionError(o1 + " != " + o2);
214 }
215
216 static void assertTrue(boolean value) {
217 if (!value)
218 throw new AssertionError("expected true");
219 }
220
221 static void assertFalse(boolean value) {
222 if (value)
223 throw new AssertionError("expected false");
224 }
225 }