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
|
/*
* Copyright © 2009 Reinier Zwitserloot and Roel Spilker.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.eclipse.agent;
import java.io.File;
import java.io.IOException;
import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.IllegalClassFormatException;
import java.lang.instrument.Instrumentation;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URI;
import java.net.URLDecoder;
import java.nio.charset.Charset;
import java.security.ProtectionDomain;
import java.util.jar.JarFile;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* This is a java-agent that patches some of eclipse's classes so AST Nodes are handed off to Lombok
* for modification before Eclipse actually uses them to compile, render errors, show code outlines,
* create auto-completion dialogs, and anything else eclipse does with java code. See the *Transformer
* classes in this package for more information about which classes are transformed and how they are
* transformed.
*/
public class EclipsePatcher {
private EclipsePatcher() {}
private static class Patcher implements ClassFileTransformer {
public byte[] transform(ClassLoader loader, String className,
Class<?> classBeingRedefined,
ProtectionDomain protectionDomain, byte[] classfileBuffer)
throws IllegalClassFormatException {
if ( ECLIPSE_PARSER_CLASS_NAME.equals(className) ) {
try {
return runTransform("lombok.eclipse.agent.EclipseParserTransformer", classfileBuffer);
} catch ( Throwable t ) {
System.err.println("Wasn't able to patch eclipse's Parser class:");
t.printStackTrace();
}
}
if ( ECLIPSE_CUD_CLASS_NAME.equals(className) ) {
try {
return runTransform("lombok.eclipse.agent.EclipseCUDTransformer", classfileBuffer);
} catch ( Throwable t ) {
System.err.println("Wasn't able to patch eclipse's CompilationUnitDeclaration class:");
t.printStackTrace();
}
}
if ( ECLIPSE_ASTCONVERTER_CLASS_NAME.equals(className) ) {
try {
return runTransform("lombok.eclipse.agent.EclipseASTConverterTransformer", classfileBuffer);
} catch ( Throwable t ) {
System.err.println("Wasn't able to patch eclipse's ASTConverter class:");
t.printStackTrace();
}
}
return null;
}
}
private static byte[] runTransform(String className, byte[] classfileBuffer) throws Exception {
Class<?> transformerClass = Class.forName(className);
Constructor<?> constructor = transformerClass.getDeclaredConstructor();
constructor.setAccessible(true);
Object instance = constructor.newInstance();
Method m = transformerClass.getDeclaredMethod("transform", byte[].class);
m.setAccessible(true);
return (byte[])m.invoke(instance, classfileBuffer);
}
static final String ECLIPSE_CUD_CLASS_NAME = "org/eclipse/jdt/internal/compiler/ast/CompilationUnitDeclaration";
static final String ECLIPSE_PARSER_CLASS_NAME = "org/eclipse/jdt/internal/compiler/parser/Parser";
static final String ECLIPSE_ASTCONVERTER_CLASS_NAME = "org/eclipse/jdt/core/dom/ASTConverter";
public static void agentmain(String agentArgs, Instrumentation instrumentation) throws Exception {
registerPatcher(instrumentation, true);
addLombokToSearchPaths(instrumentation);
}
private static void addLombokToSearchPaths(Instrumentation instrumentation) throws Exception {
String path = findPathOfOurClassloader();
//On java 1.5, you don't have these methods, so you'll be forced to manually -Xbootclasspath/a them in.
tryCallMethod(instrumentation, "appendToSystemClassLoaderSearch", path + "/lombok.jar");
tryCallMethod(instrumentation, "appendToBootstrapClassLoaderSearch", path + "/lombok.eclipse.agent.jar");
}
private static void tryCallMethod(Object o, String methodName, String path) {
try {
Instrumentation.class.getMethod(methodName, JarFile.class).invoke(o, new JarFile(path));
} catch ( Throwable ignore ) {}
}
private static String findPathOfOurClassloader() throws Exception {
URI uri = EclipsePatcher.class.getResource("/" + EclipsePatcher.class.getName().replace('.', '/') + ".class").toURI();
Pattern p = Pattern.compile("^jar:file:([^\\!]+)\\!.*\\.class$");
Matcher m = p.matcher(uri.toString());
if ( !m.matches() ) return ".";
String rawUri = m.group(1);
return new File(URLDecoder.decode(rawUri, Charset.defaultCharset().name())).getParent();
}
public static void premain(String agentArgs, Instrumentation instrumentation) throws Exception {
registerPatcher(instrumentation, false);
addLombokToSearchPaths(instrumentation);
}
private static void registerPatcher(Instrumentation instrumentation, boolean transformExisting) throws IOException {
instrumentation.addTransformer(new Patcher()/*, true*/);
if ( transformExisting ) for ( Class<?> c : instrumentation.getAllLoadedClasses() ) {
if ( c.getName().equals(ECLIPSE_PARSER_CLASS_NAME) || c.getName().equals(ECLIPSE_CUD_CLASS_NAME) ) {
try {
//instrumentation.retransformClasses(c); - //not in java 1.5.
Instrumentation.class.getMethod("retransformClasses", Class[].class).invoke(instrumentation,
new Object[] { new Class[] {c }});
} catch ( InvocationTargetException e ) {
throw new UnsupportedOperationException(
"The eclipse parser class is already loaded and cannot be modified. " +
"You'll have to restart eclipse in order to use Lombok in eclipse.");
} catch ( Throwable t ) {
throw new UnsupportedOperationException(
"This appears to be a java 1.5 instance, which cannot reload already loaded classes. " +
"You'll have to restart eclipse in order to use Lombok in eclipse.");
}
}
}
}
}
|
