1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.lang.annotation.Annotation;
import java.lang.instrument.ClassDefinition;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Method;
public class RedefineMethodWithAnnotationsApp {
public static void main(String args[]) throws Exception {
System.out.println("Hello from RedefineMethodWithAnnotationsApp!");
new RedefineMethodWithAnnotationsApp().doTest();
System.exit(0);
}
private void doTest() throws Exception {
doMethodParameterAnnotationsTest();
}
private void doMethodParameterAnnotationsTest() throws Exception {
verifyMethodParameterAnnotationsValue(
ParameterAnnotation.STRING_VALUE_1);
doRedefine(RedefineMethodWithAnnotationsTarget.class);
verifyMethodParameterAnnotationsValue(
ParameterAnnotation.STRING_VALUE_2);
}
private static void verifyMethodParameterAnnotationsValue(
String expectedValue) throws Exception {
Class<RedefineMethodWithAnnotationsTarget> c =
RedefineMethodWithAnnotationsTarget.class;
Method method = c.getMethod("annotatedMethod", String.class);
Annotation [][] parametersAnnotations =
method.getParameterAnnotations();
if (parametersAnnotations.length != 1) {
throw new Exception("Incorrect number of parameters to method: " +
method.getName() + "." +
" Expected: 1," +
" got: " + parametersAnnotations.length);
}
Annotation[] parameterAnnotations = parametersAnnotations[0];
if (parameterAnnotations.length != 1) {
throw new Exception("Incorrect number of annotations." +
" Expected: 1" +
", got " + parameterAnnotations.length);
}
Annotation parameterAnnotation = parameterAnnotations[0];
if (!(parameterAnnotation instanceof ParameterAnnotation)) {
throw new Exception("Incorrect Annotation class." +
" Expected: " + ParameterAnnotation.class.getName() +
", got: " + parameterAnnotation.getClass().getName());
}
ParameterAnnotation pa = (ParameterAnnotation)parameterAnnotation;
String annotationValue = pa.value();
if (!expectedValue.equals(annotationValue)) {
throw new Exception("Incorrect parameter annotation value." +
" Expected: " + expectedValue +
", got: " + annotationValue);
}
}
private static void doRedefine(Class<?> clazz) throws Exception {
// Load the second version of this class.
File f = new File(clazz.getName() + ".class");
System.out.println("Reading test class from " + f);
InputStream redefineStream = new FileInputStream(f);
byte[] redefineBuffer = NamedBuffer.loadBufferFromStream(redefineStream);
ClassDefinition redefineParamBlock = new ClassDefinition(
clazz, redefineBuffer);
RedefineMethodWithAnnotationsAgent.getInstrumentation().redefineClasses(
new ClassDefinition[] {redefineParamBlock});
}
}
|
