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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*
* Copyright (c) 2013, 2015, 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.IOException;
import java.io.Writer;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;
import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.annotation.processing.SupportedOptions;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic;
import javax.tools.DiagnosticCollector;
import javax.tools.DiagnosticListener;
import javax.tools.FileObject;
import javax.tools.ForwardingJavaFileManager;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import javax.tools.JavaFileObject.Kind;
import javax.tools.SimpleJavaFileObject;
import com.sun.source.tree.AnnotationTree;
import com.sun.source.tree.CompilationUnitTree;
import com.sun.source.tree.LiteralTree;
import com.sun.source.util.JavacTask;
import com.sun.source.util.TreeScanner;
import com.sun.source.util.Trees;
import com.sun.tools.javac.api.JavacTool;
import com.sun.tools.javac.file.JavacFileManager;
import com.sun.tools.javac.util.Assert;
@SupportedAnnotationTypes("*")
@SupportedOptions("target")
public class Processor extends AbstractProcessor {
private int round = 0;
@Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
if (round++ == 0) {
try (Writer out = processingEnv.getFiler()
.createSourceFile("Anno.java")
.openWriter()) {
String target = processingEnv.getOptions().get("target");
String code = "import java.lang.annotation.ElementType;\n" +
"import java.lang.annotation.Target;\n" +
"@Target(ElementType." + target + ")\n" +
"@interface Anno { public String value(); }\n";
out.write(code);
} catch (IOException exc) {
throw new IllegalStateException(exc);
}
}
return true;
}
public static void main(String... args) throws IOException, URISyntaxException {
if (args.length != 1) throw new IllegalStateException("Must provide class name!");
String testContent = null;
File testSrc = new File(System.getProperty("test.src"));
File testFile = new File(testSrc, args[0]);
if (!testFile.canRead()) throw new IllegalStateException("Cannot read the test source");
JavacTool compiler = JavacTool.create();
JavacFileManager fm = compiler.getStandardFileManager(null, null, null);
testContent = fm.getJavaFileObject(testFile.toPath()).getCharContent(true).toString();
JavaFileObject testFileObject = new TestFO(new URI("mem://" + args[0]), testContent);
TestFM testFileManager = new TestFM(fm);
JavacTask task = compiler.getTask(null,
testFileManager,
new DiagnosticCollector<JavaFileObject>(),
null,
null,
Arrays.asList(testFileObject));
final Trees trees = Trees.instance(task);
final CompilationUnitTree cut = task.parse().iterator().next();
final Map<int[], String> annotation2Target = new TreeMap<>(new Comparator<int[]>() {
@Override public int compare(int[] o1, int[] o2) {
return o2[0] - o1[0];
}
});
new TreeScanner<Void, Void>() {
@Override
public Void visitAnnotation(AnnotationTree node, Void p) {
int endPos = (int) trees.getSourcePositions().getEndPosition(cut, node);
Assert.check(endPos >= 0);
int startPos = (int) trees.getSourcePositions().getStartPosition(cut, node);
String target = ((LiteralTree) node.getArguments().get(0)).getValue().toString();
annotation2Target.put(new int[] {startPos, endPos}, target);
return super.visitAnnotation(node, p);
}
}.scan(cut.getTypeDecls().get(0), null);
DiagnosticListener<JavaFileObject> noErrors = new DiagnosticListener<JavaFileObject>() {
@Override public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
throw new IllegalStateException(diagnostic.toString());
}
}
};
for (Entry<int[], String> e : annotation2Target.entrySet()) {
StringBuilder updatedContent = new StringBuilder();
int last = testContent.length();
for (int[] toRemove : annotation2Target.keySet()) {
if (toRemove == e.getKey()) continue;
updatedContent.insert(0, testContent.substring(toRemove[1], last));
last = toRemove[0];
}
updatedContent.insert(0, testContent.substring(0, last));
JavaFileObject updatedFile = new TestFO(new URI("mem://" + args[0]),
updatedContent.toString());
JavacTask testTask = compiler.getTask(null,
testFileManager,
noErrors,
Arrays.asList("-processor", "Processor",
"-Atarget=" + e.getValue()),
null,
Arrays.asList(updatedFile));
try {
testTask.analyze();
} catch (Throwable exc) {
System.out.println("error while processing:");
System.out.println(updatedContent);
throw exc;
}
JavacTask testTask2 = compiler.getTask(null,
testFileManager,
new DiagnosticCollector<JavaFileObject>(),
null,
null,
Arrays.asList(updatedFile));
try {
testTask2.analyze();
} catch (Throwable exc) {
System.out.println("error while processing:");
System.out.println(updatedContent);
throw exc;
}
}
}
private static final class TestFO extends SimpleJavaFileObject {
private final String content;
public TestFO(URI uri, String content) {
super(uri, Kind.SOURCE);
this.content = content;
}
@Override public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
return content;
}
@Override public boolean isNameCompatible(String simpleName, Kind kind) {
return true;
}
}
private static final class TestFM extends ForwardingJavaFileManager<JavaFileManager> {
public TestFM(JavaFileManager fileManager) {
super(fileManager);
}
@Override
public boolean isSameFile(FileObject a, FileObject b) {
return a.equals(b);
}
}
}
|
