为什么当我在注释处理器中评估配套对象修饰符时，它始终是私有的?

Question

我有一个自定义注释，它的Retention是AnnotationRetention.SOURCE的，我想确保注释的变量是一个public static但我对 Kotlin 伴随对象有问题，即使我明确声明它们public，它们似乎也很private。

这是我的注释代码：

class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
}
companion object {
@AZNEncryptor("the raw string")
public var str: String? = null
}
}

我的注释处理器代码是：

override fun process(set: Set<TypeElement>, roundEnvironment: RoundEnvironment): Boolean {        roundEnvironment.getElementsAnnotatedWith(AZNEncryptor::class.java).forEach { element ->
if (element.getKind() != ElementKind.FIELD) {
processingEnv.messager.printMessage(Diagnostic.Kind.ERROR, "this annotation can only be applied to the variables.")
return true
}

val variableElement = element as VariableElement
for(modifier in variableElement.modifiers)
{
processingEnv.messager.printMessage(Diagnostic.Kind.WARNING,  modifier.name)
}
if (!variableElement.modifiers.contains(Modifier.STATIC) || !variableElement.modifiers.contains(Modifier.PUBLIC)) {
processingEnv.messager.printMessage(Diagnostic.Kind.ERROR, "the annotated variable must be a "public static"")
return true
}
generateClass("constants", variableElement.simpleName.toString())
return true
}

Answer 1

我发现了问题。 当我反编译 Kotlin 代码字节码时，我得到了这个 Java 代码：

public final class MainActivity extends AppCompatActivity {
@Nullable
private static String str;
.
.
.
public static final class Companion {
@Nullable
public String getStr() {
return MainActivity.str;
}
public void setStr(@Nullable String var1) {
MainActivity.str = var1;
}
private Companion() {
}
// $FF: synthetic method
public Companion(DefaultConstructorMarker $constructor_marker) {
this();
}
}
}

如您所见，变量更改为private static.我只需要使用@JvmField来解决这个问题，现在反编译的字节代码如下所示：

public final class MainActivity extends AppCompatActivity {
@JvmField
@Nullable
public static String str;
.
.
.
public static final class Companion {
private Companion() {
}
// $FF: synthetic method
public Companion(DefaultConstructorMarker $constructor_marker) {
this();
}
}
}