java - Force Java Immutables to generate toString() for Throwable classes

Question

Is it possible to force Java Immutables annotation processing library to generate toString method for an abstract class which already inherits non-default toString() method?

For example:

@Value.Immutables
public abstract class MyRuntimeException extends RuntimeException {
    @Value.Default
    public abstract long timestamp();
    @Value.Redacted
    public abstract long secretTimestamp();
}

And result to be:

MyRuntimeException e = ImmutableMyRuntimeException.builder().timestamp(111)
                                              .secretTimestamp(222).build();
assert e.toString().contains("111");
assert !e.toString().contains("222");

RuntimeException inherits toString() from Throwables and what I have seen so far Immutables library skips generating toString() because of that.

Answer 1

有一种这样的方法。诀窍是toString在抽象值类型中声明抽象方法签名。

@Value.Immutable
public abstract class MyRuntimeException extends RuntimeException {
    public abstract long timestamp();
    public abstract long secretTimestamp();
    @Override public abstract String toString(); //<-- forces toString impl
}