在Java中进行注释处理期间发生错误时，如何打印堆栈跟踪

Question

I'm working on a Java library that has an annotation processor. To trap exceptions I wrote code similar to the following code:

public class KriptonProcessor extends AbstractProcessor {

  @Override
  public boolean process(final Set<? extends TypeElement> annotations, final RoundEnvironment roundEnv) {
    try {
        ...
        return true;
    } catch (Throwable e) {
        String msg = StringUtils.nvl(e.getMessage());
        error(null, e.getClass().getCanonicalName() + ": " + msg);
        e.printStackTrace();

    }

    return true;
  }
}

When an exception occurs, actually it's displayed as:

e: error: java.lang.NullPointerException:

While I was expecting the full stack trace, useful to detect where is the problem. Any ideas to accomplish this task?

Thanks in advance.

Answer 1

public class KriptonProcessor extends AbstractProcessor {

  @Override
  public boolean process(final Set<? extends TypeElement> annotations, final RoundEnvironment roundEnv) {
    try {
        ...
        return true;
    } catch (Throwable e) {
        e.printStackTrace();
        return false;

    }

    return true;
  }
}