有没有人试图将google guice的使用与混淆（特别是proguard）结合起来？ 我的代码的混淆版本不适用于google guice，因为guice抱怨缺少类型参数。这些信息似乎被proguard所做的转换步骤所删除，即使相关类被排除在混淆之外。
堆栈跟踪如下所示：
com.google.inject.CreationException: Guice creation errors:
1) Cannot inject a Provider that has no type parameter
while locating com.google.inject.Provider
for parameter 0 at de.repower.lvs.client.admin.user.administration.AdminUserCommonPanel.setPasswordPanelProvider(SourceFile:499)
at de.repower.lvs.client.admin.user.administration.AdminUserCommonPanel.setPasswordPanelProvider(SourceFile:499)
while locating de.repower.lvs.client.admin.user.administration.AdminUserCommonPanel
for parameter 0 at de.repower.lvs.client.admin.user.administration.b.k.setParentPanel(SourceFile:65)
at de.repower.lvs.client.admin.user.administration.b.k.setParentPanel(SourceFile:65)
at de.repower.lvs.client.admin.user.administration.o.a(SourceFile:38)
2) Cannot inject a Provider that has no type parameter
while locating com.google.inject.Provider
for parameter 0 at de.repower.lvs.client.admin.user.administration.AdminUserCommonPanel.setWindTurbineAccessGroupProvider(SourceFile:509)
at de.repower.lvs.client.admin.user.administration.AdminUserCommonPanel.setWindTurbineAccessGroupProvider(SourceFile:509)
while locating de.repower.lvs.client.admin.user.administration.AdminUserCommonPanel
for parameter 0 at de.repower.lvs.client.admin.user.administration.b.k.setParentPanel(SourceFile:65)
at de.repower.lvs.client.admin.user.administration.b.k.setParentPanel(SourceFile:65)
at de.repower.lvs.client.admin.user.administration.o.a(SourceFile:38)
2 errors
at com.google.inject.internal.Errors.throwCreationExceptionIfErrorsExist(Errors.java:354)
at com.google.inject.InjectorBuilder.initializeStatically(InjectorBuilder.java:152)
at com.google.inject.InjectorBuilder.build(InjectorBuilder.java:105)
at com.google.inject.Guice.createInjector(Guice.java:92)
at com.google.inject.Guice.createInjector(Guice.java:69)
at com.google.inject.Guice.createInjector(Guice.java:59)
我试图创建一个似乎重现问题的小例子（不使用guice）：
package de.repower.common;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
class SomeClass<S> {
}
public class ParameterizedTypeTest {
public void someMethod(SomeClass<Integer> param) {
System.out.println("value: " + param);
System.setProperty("my.dummmy.property", "hallo");
}
private static void checkParameterizedMethod(ParameterizedTypeTest testObject) {
System.out.println("checking parameterized method ...");
Method[] methods = testObject.getClass().getMethods();
for (Method method : methods) {
if (method.getName().equals("someMethod")) {
System.out.println("Found method " + method.getName());
Type[] types = method.getGenericParameterTypes();
Type parameterType = types[0];
if (parameterType instanceof ParameterizedType) {
Type parameterizedType = ((ParameterizedType) parameterType).getActualTypeArguments()[0];
System.out.println("Parameter: " + parameterizedType);
System.out.println("Class: " + ((Class) parameterizedType).getName());
} else {
System.out.println("Failed: type ist not instance of ParameterizedType");
}
}
}
}
public static void main(String[] args) {
System.out.println("Starting ...");
try {
ParameterizedTypeTest someInstance = new ParameterizedTypeTest();
checkParameterizedMethod(someInstance);
} catch (SecurityException e) {
e.printStackTrace();
}
}
}
如果您运行此代码未经过模糊处理，则输出如下所示：
Starting ...
checking parameterized method ...
Found method someMethod
Parameter: class java.lang.Integer
Class: java.lang.Integer
但运行使用proguard混淆的版本会产生：
Starting ...
checking parameterized method ...
Found method someMethod
Failed: type ist not instance of ParameterizedType
这些是我用于混淆的选项：
-injars classes_eclipse\methodTest.jar
-outjars classes_eclipse\methodTestObfuscated.jar
-libraryjars 'C:\Program Files\Java\jre6\lib\rt.jar'
-dontskipnonpubliclibraryclasses
-dontskipnonpubliclibraryclassmembers
-dontshrink
-printusage classes_eclipse\shrink.txt
-dontoptimize
-dontpreverify
-verbose
-keep class **.ParameterizedTypeTest.class {
<fields>;
<methods>;
}
-keep class ** {
<fields>;
<methods>;
}
# Keep - Applications. Keep all application classes, along with their 'main'
# methods.
-keepclasseswithmembers public class * {
public static void main(java.lang.String[]);
}
# Also keep - Enumerations. Keep the special static methods that are required in
# enumeration classes.
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
# Also keep - Database drivers. Keep all implementations of java.sql.Driver.
-keep class * extends java.sql.Driver
# Also keep - Swing UI L&F. Keep all extensions of javax.swing.plaf.ComponentUI,
# along with the special 'createUI' method.
-keep class * extends javax.swing.plaf.ComponentUI {
public static javax.swing.plaf.ComponentUI createUI(javax.swing.JComponent);
}
# Keep names - Native method names. Keep all native class/method names.
-keepclasseswithmembers,allowshrinking class * {
native <methods>;
}
# Keep names - _class method names. Keep all .class method names. This may be
# useful for libraries that will be obfuscated again with different obfuscators.
-keepclassmembers,allowshrinking class * {
java.lang.Class class$(java.lang.String);
java.lang.Class class$(java.lang.String,boolean);
}
有没有人知道如何解决这个问题（除了明显的解决方法，将相关文件放入一个单独的jar而不是混淆它）？
最好的问候，
斯蒂芬
答案 0 :(得分：8)
使用了proguard很长一段时间后，我决定如何解决有关反射的问题（而Guice只是一个用例）。
只要没有将类或方法名称作为字符串输入，就可以与Proguard一起使用反射。
这就是说这段代码有效，并且可以在ProGuard混淆后使用
Class someClass = Class.forName(SomeClass.class.getName());
虽然此代码不起作用
Class someClass = Class.forName("SomeClass");
此外，Proguard将缩小未调用的方法和构造函数。因此，Class.newInstance方法将无效。不幸的是，通常的Guice绑定使用这种方法。
这会对Guice代码产生一些影响。
答案 1 :(得分：7)
在JDK 5.0及更高版本中进行编译时，需要“Signature”属性才能访问泛型类型。
使用-keepattributes签名来修复ParameterizedType
的错误答案 2 :(得分：3)
使用当前版本的Proguard（4.7），我可以通过添加以下内容来实现它： -
-keepattributes *Annotation*,Signature
-keep class com.google.inject.Binder
-keep public class com.google.inject.Inject
# keeps all fields and Constructors with @Inject
-keepclassmembers,allowobfuscation class * {
@com.google.inject.Inject <fields>;
@com.google.inject.Inject <init>(...);
}
除了明确保留由Guice创建的任何类，例如
-keep class com.example.Service
答案 3 :(得分：0)
以下代码对我有用，遇到了同样的问题。
-keepattributes Signature是解决方法。
-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
#-dontobfuscate
-repackageclasses ''
-keepattributes *Annotation*
-keepattributes Signature
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService
-keepclasseswithmembernames class * {
native <methods>;
}
-keepclasseswithmembernames class * {
public <init>(android.content.Context, android.util.AttributeSet);
}
-keepclasseswithmembernames class * {
public <init>(android.content.Context, android.util.AttributeSet, int);
}
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keepattributes Signature
-keep class * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator *;
}
-keep class com.google.inject.Binder
-keepclassmembers class * {
@com.google.inject.Inject <init>(...);
}
-keep public class * extends android.view.View {
public <init>(android.content.Context);
public <init>(android.content.Context, android.util.AttributeSet);
public <init>(android.content.Context, android.util.AttributeSet, int);
public void set*(...);
}
# I didn't need this one, maybe you need it.
#-keep public class roboguice.**
-keepclassmembers class **.R$* {
public static <fields>;
}