ScalaDoc fails to recognize inherited inner enum

[scabug]

The ScalaDoc tool is breaking on a mixed Java/Scala project because it seems unable to properly parse Java code with an inherited inner enum. I have recreated the problem with a very small test project.

Consider the two classes:

public abstract class AbstractPolygon {

    public static enum Color {
        RED,
        GREEN,
        BLUE;
    }

    private final Color color;
    private final int sides;

    public AbstractPolygon (final Color color, final int sides) {
        this.color = color;
        this.sides = sides;
    }
}

public class Triangle extends AbstractPolygon {

    private final double angle1;
    private final double angle2;

    public Triangle (final Color color, final double angle1, final double angle2) {
        super(color, 3);
        this.angle1 = angle1;
        this.angle2 = angle2;
    }
}

The above java code is valid, yet the ScalaDoc tool will complain processing Triangle.java saying:
{quote}error: not found: type Color{quote}

I have attached a sample project that recreates the issue. Simply do the following to reproduce: mvn clean install site

Note that a workaround is to explicitly import the enum. So, for Triangle.java, ScalaDoc will work if the following is added:

import com.acme.AbstractPolygon.Color;

(Unfortunately, then this creates a style issue in the Java code since that import is not necessary.)

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-8993?orig=1
Reporter: Anthony Whitford (awhitford)
Affected Versions: 2.11.4
See #1409, #1211
Attachments:

• java-inner-enum-bug.zip (created on Nov 18, 2014 9:09:42 PM UTC, 4103 bytes)

[scabug]

Alessandro Vermeulen (Spockz) said:
We have the same issue with enums imported directly through implements SomeInterface. The import 'fixes' the issue but is fragile as it will be removed by auto-layout.

Any ideas on whether, and if yes, when, this will be fixed?

[scabug]

Nathan Blomquist (nblomquist) said:
I just ran into this with Java8's Stream Collector. This may become more of a problem as it is now happening with a Java standard library interface.

Example:

import java.util.Set;
import java.util.function.BiConsumer;
import java.util.function.BinaryOperator;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Collector;
public class MyCollector implements Collector<Object, Object, Object> {
    @Override
    public Supplier<Object> supplier() {
        return null;
    }

    @Override
    public BiConsumer<Object, Object> accumulator() {
        return null;
    }

    @Override
    public BinaryOperator<Object> combiner() {
        return null;
    }

    @Override
    public Function<Object, Object> finisher() {
        return null;
    }

    /***
     * This breaks, because of Characteristics isn't directly imported.
     * 
     */
    @Override
    public Set<Characteristics> characteristics() {
        return null;
    }
}

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@SethTisue said:
probably related to #1409

[som-snytt]

Scaladoc runs to completion, but doesn't emit a companion object for the enclosing Java class, though hover over Color correctly says AbstractPolygon.Color.

Since that would be a (possibly dubious) enhancement, closing this ticket.