java 如何告诉 proguard 保持枚举常量和字段

How to tell proguard to keep enum constants and fields

提问by Hubbitus

I've try obfuscate our web application which use spring, jaxb and relies on annotations, and reflection heavily. I apply many recipes found in internet to keep some classes, attributes, annotations and enumerations. But with enumerations still have problem. I've able preserve enum constants apply configuration from http://proguard.sourceforge.net/manual/examples.html#enumerations:

我尝试混淆使用 spring、jaxb 并严重依赖注释和反射的 Web 应用程序。我应用了许多在互联网上找到的食谱来保留一些类、属性、注释和枚举。但是枚举仍然有问题。我已经能够从http://proguard.sourceforge.net/manual/examples.html#enumerations保留枚举常量应用配置：

-keepclassmembers,allowoptimization enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

At first glance it looks like working solution and constant preserved, so (Class.getEnumConstants()) return correct list of values. But I got NoSuchFieldException when I try retrieve field by any of that by name.

乍一看，它看起来像是有效的解决方案和常量，因此（Class.getEnumConstants()）返回正确的值列表。但是当我尝试按名称中的任何一个检索字段时，我得到了 NoSuchFieldException。

Problem come from jaxb reflection navigator, please look at code:

问题来自jaxb 反射导航器，请看代码：

public Field[] getEnumConstants(Class clazz) {
    try {
        Object[] values = clazz.getEnumConstants();
        Field[] fields = new Field[values.length];
        for (int i = 0; i < values.length; i++) {
            fields[i] = clazz.getField(((Enum) values[i]).name());
        }
        return fields;
    } catch (NoSuchFieldException e) {
        // impossible
        throw new NoSuchFieldError(e.getMessage());
    }
}

I fall exactly into "impossible" branch. I think it will be easy understandable to look at debug session screenshot (there also listed constants):

我完全属于“不可能”的分支。我认为查看调试会话屏幕截图很容易理解（还列出了常量）：

And if I try obtain fields, they are listed obfuscated as a, b, c, d, e, f:

如果我尝试获取字段，它们会被混淆为 a、b、c、d、e、f：

My proguard configuration now look like (strip out some library listing and kipp particular classes, fields and methods about proguard complain):

我的 proguard 配置现在看起来像（去掉一些关于 proguard 抱怨的库列表和 kipp 特定的类、字段和方法）：

-injars  core-3.15.rc5.6.jar
-outjars core-3.15.rc5.6.proguard.jar

-libraryjars <java.home>/lib/rt.jar

-libraryjars ... # Other libs listed, strip out for shortness

-printmapping core-3.15.rc5.6.proguard.map

-keep public class ru.rlh.egais.portal.backend.controller.rest.**
-keep public class ru.rlh.egais.portal.backend.integration.soap.service.**

# http://midgetontoes.com/blog/2015/06/26/tips-for-using-proguard-with-spring-framework
-optimizations !class/marking/final

-adaptresourcefilecontents **.properties,META-INF/MANIFEST.MF,META-INF/spring.*,spring/*

-keepattributes Exceptions,InnerClasses,Signature,Deprecated,SourceFile,LineNumberTable,*Annotation*,EnclosingMethod
# Also tried:
# -keepattributes **

-allowaccessmodification
-dontshrink
-dontoptimize
-dontusemixedcaseclassnames
-keepdirectories
-keep @org.springframework.transaction.annotation.Transactional class *
-keep @org.springframework.stereotype.Service class *
-keep @org.springframework.stereotype.Repository class *
-keep @org.springframework.stereotype.Controller class *
-keep @org.springframework.stereotype.Component class *
-keep @org.springframework.beans.factory.annotation.Autowired class *
-keep @org.springframework.web.bind.annotation.ResponseBody class *
-keep @org.springframework.web.bind.annotation.RequestMapping class *
-keep @org.springframework.stereotype.Repository class *
-keep @javax.annotation.Resource class *
-keep @org.springframework.cache.annotation.EnableCaching class *
-keep @org.springframework.context.annotation.Configuration class *

-keepclassmembers class * {
    @org.springframework.beans.factory.annotation.* *;
    @org.springframework.beans.factory.annotation.Qualifier *;
    @org.springframework.beans.factory.annotation.Value *;
    @org.springframework.beans.factory.annotation.Required *;
    @org.springframework.context.annotation.Bean *;
    @javax.annotation.PostConstruct *;
    @javax.annotation.PreDestroy *;
    @org.aspectj.lang.annotation.AfterReturning *;
    @org.aspectj.lang.annotation.Pointcut *;
    @org.aspectj.lang.annotation.AfterThrowing *;
    @org.aspectj.lang.annotation.Around *;
}

-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

So, my question how I could fully keep public enums from obfuscation? In both cases - use its constants (class.getEnumConstants()) and fields (class.getFields()).

那么，我的问题是如何才能完全避免公共枚举被混淆？在这两种情况下 - 使用其常量（class.getEnumConstants()）和字段（class.getFields()）。

回答by Hubbitus

Thanks to http://sourceforge.net/p/proguard/discussion/182455/thread/1c28f199/I found solution for my question (<?fields>must be added):

感谢http://sourceforge.net/p/proguard/discussion/182455/thread/1c28f199/我找到了我的问题的解决方案（必须添加<?fields>）：

-keepclassmembers class * extends java.lang.Enum {
    <fields>;
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

回答by Joma

This worked fine for me.

这对我来说很好。

-keep public enum com.company.appname.**{
    *;
}

Where ** is package and subpackages.

其中 ** 是包和子包。