1 /*
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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).
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23 
24 /*
25  * @test
26  * @bug 8015701
27  * @summary Test method parameter attribute generation with captured locals.
28  * @compile -parameters CaptureTest.java
29  * @run main CaptureTest
30  */
31 import java.lang.Class;
32 import java.lang.reflect.Constructor;
33 import java.lang.reflect.Parameter;
34 import java.lang.reflect.Modifier;
35 import java.util.List;
36 import java.util.ArrayList;
37 
38 public class CaptureTest {
39 
40     private static final int SYNTHETIC = 0x1000;
41     private static final int MANDATED = 0x8000;
42 
main(String... args)43     public static void main(String... args) throws Exception {
44         new CaptureTest().run();
45     }
46 
47 
run()48     private void run() throws Exception {
49         final Encloser pn = new Encloser();
50 
51         /* Cases covered here:
52          *
53          * - Local class
54          * - Inner class
55          * - Anonymous class
56          * - Anonymous class extending a local
57          * - Anonymous class extending an inner
58          */
59         pn.makeLocal("hello").check();
60         pn.makeInner("hello").check();
61         pn.makeAnon("hello").check();
62         pn.makeAnonExtendsLocal("hello").check();
63         pn.makeAnonExtendsInner("hello").check();
64 
65         if (0 != errors)
66             throw new Exception("MethodParameters test failed with " +
67                                 errors + " errors");
68     }
69 
error(final String msg)70     private void error(final String msg) {
71         System.err.println("Error: " + msg);
72         errors++;
73     }
74 
75     int errors;
76 
77     abstract class Tester {
78 
Tester(final int param)79         public Tester(final int param) {}
80 
names()81         protected abstract String[] names();
modifiers()82         protected abstract int[] modifiers();
types()83         protected abstract Class[] types();
84 
check()85         public void check() {
86             final Class<?> cls = this.getClass();
87             final Constructor<?> ctor = cls.getDeclaredConstructors()[0];
88             final Parameter[] params = ctor.getParameters();
89             final String[] names = names();
90             final int[] modifiers = modifiers();
91             final Class[] types = types();
92 
93             System.err.println("Testing class " + cls);
94 
95             if (params.length == names.length) {
96                 for (int i = 0; i < names.length; i++) {
97                     System.err.println("Testing parameter " + params[i].getName());
98                     if (!params[i].getName().equals(names[i]))
99                         error("Expected parameter name " + names[i] +
100                               " got " + params[i].getName());
101                     if (params[i].getModifiers() != modifiers[i])
102                         error("Expected parameter modifiers " +
103                               modifiers[i] + " got " +
104                               params[i].getModifiers());
105                     if (!params[i].getType().equals(types[i]))
106                         error("Expected parameter type " + types[i] +
107                               " got " + params[i].getType());
108                 }
109             } else
110                 error("Expected " + names.length + " parameters");
111 
112         }
113 
114     }
115 
116     class Encloser {
117         private class InnerTester extends Tester {
InnerTester(final int innerparam)118             public InnerTester(final int innerparam) {
119                 super(innerparam);
120             }
121 
names()122             protected String[] names() {
123                 return new String[] {
124                     "this$1",
125                     "innerparam"
126                 };
127             }
128 
modifiers()129             protected int[] modifiers() {
130                 return new int[] {
131                     Modifier.FINAL | SYNTHETIC,
132                     Modifier.FINAL
133                 };
134             }
135 
types()136             protected Class[] types() {
137                 return new Class[] {
138                     Encloser.class,
139                     int.class
140                 };
141             }
142         }
143 
makeInner(final String message)144         public Tester makeInner(final String message) {
145             return new InnerTester(2);
146         }
147 
makeLocal(final String message)148         public Tester makeLocal(final String message) {
149             class LocalTester extends Tester {
150                 public LocalTester(final int localparam) {
151                     super(localparam);
152                 }
153 
154                 protected String[] names() {
155                     return new String[] {
156                         "this$1",
157                         "localparam",
158                         "val$message"
159                     };
160                 }
161 
162                 protected int[] modifiers() {
163                     return new int[] {
164                         Modifier.FINAL | MANDATED,
165                         Modifier.FINAL,
166                         Modifier.FINAL | SYNTHETIC
167                     };
168                 }
169 
170                 protected Class[] types() {
171                     return new Class[] {
172                         Encloser.class,
173                         int.class,
174                         String.class
175                     };
176                 }
177 
178                 public String message() {
179                     return message;
180                 }
181             }
182 
183             return new LocalTester(2);
184         }
185 
makeAnonExtendsLocal(final String message)186         public Tester makeAnonExtendsLocal(final String message) {
187             abstract class LocalTester extends Tester {
188                 public LocalTester(final int localparam) {
189                     super(localparam);
190                 }
191 
192                 protected String[] names() {
193                     return new String[] {
194                         "this$1",
195                         "localparam",
196                         "val$message"
197                     };
198                 }
199 
200                 protected int[] modifiers() {
201                     return new int[] {
202                         Modifier.FINAL | MANDATED,
203                         Modifier.FINAL,
204                         Modifier.FINAL | SYNTHETIC
205                     };
206                 }
207 
208                 protected Class[] types() {
209                     return new Class[] {
210                         Encloser.class,
211                         int.class,
212                         String.class
213                     };
214                 }
215 
216             }
217 
218             return new LocalTester(2) {
219                 public String message() {
220                     return message;
221                 }
222             };
223         }
224 
makeAnonExtendsInner(final String message)225         public Tester makeAnonExtendsInner(final String message) {
226             return new InnerTester(2) {
227                 protected String[] names() {
228                     return new String[] {
229                         "this$1",
230                         "innerparam",
231                         "val$message"
232                     };
233                 }
234 
235                 protected int[] modifiers() {
236                     return new int[] {
237                         Modifier.FINAL | MANDATED,
238                         Modifier.FINAL,
239                         Modifier.FINAL | SYNTHETIC
240                     };
241                 }
242 
243                 protected Class[] types() {
244                     return new Class[] {
245                         Encloser.class,
246                         int.class,
247                         String.class
248                     };
249                 }
250 
251                 public String message() {
252                     return message;
253                 }
254             };
255         }
256 
257         public Tester makeAnon(final String message) {
258             return new Tester(2) {
259                 protected String[] names() {
260                     return new String[] {
261                         "this$1",
262                         "param",
263                         "val$message"
264                     };
265                 }
266 
267                 protected int[] modifiers() {
268                     return new int[] {
269                         Modifier.FINAL | MANDATED,
270                         Modifier.FINAL,
271                         Modifier.FINAL | SYNTHETIC
272                     };
273                 }
274 
275                 protected Class[] types() {
276                     return new Class[] {
277                         Encloser.class,
278                         int.class,
279                         String.class
280                     };
281                 }
282 
283                 public String message() {
284                     return message;
285                 }
286             };
287         }
288     }
289 }
290