Can it support Opaque types?

[shengbinxu]

I have a custom type:

      - id: time
        size: 6
        type: bcd_encoding

It is defined in Java code as follows:

public class BcdEncoding extends KaitaiStruct {

    private BcdEncoding _root;

    public BcdEncoding(KaitaiStream _io) {
        super(_io);
        _read();
    }

    public BcdEncoding(KaitaiStream _io, KaitaiStruct _parent, BcdEncoding _root) {
        super(_io);
        this._parent = _parent;
        this._root = _root == null ? this : _root;
        _read();
    }
......
}

When running, an error occurs:

cl = class io.kaitai.struct.visualized.BcdEncoding
java.util.concurrent.ExecutionException: java.lang.NoSuchFieldException: _attrStart
        at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
        at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
        at java.desktop/javax.swing.SwingWorker.get(SwingWorker.java:613)
        at io.kaitai.struct.visualizer.DataNode$1.done(DataNode.java:175)
        at java.desktop/javax.swing.SwingWorker$5.run(SwingWorker.java:750)
        at java.desktop/javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(SwingWorker.java:848)
        at java.desktop/sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:112)
        at java.desktop/javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(SwingWorker.java:858)
        at java.desktop/javax.swing.Timer.fireActionPerformed(Timer.java:311)
        at java.desktop/javax.swing.Timer$DoPostEvent.run(Timer.java:243)
        at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
        at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
        at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
        at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
        at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
        at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
        at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
        at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
        at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
        at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
        at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
        at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.NoSuchFieldException: _attrStart
        at java.base/java.lang.Class.getDeclaredField(Class.java:2610)
        at io.kaitai.struct.visualizer.DebugAids.fromStruct(DebugAids.java:48)
        at io.kaitai.struct.visualizer.DataNode$1.doInBackground(DataNode.java:140)
        at io.kaitai.struct.visualizer.DataNode$1.doInBackground(DataNode.java:99)
        at java.desktop/javax.swing.SwingWorker$1.call(SwingWorker.java:304)

If it can be supported, this tool would be perfect. It could be used as a .ksy file debugger by first writing the .ksy file and then debugging with the Kaitai Struct GUI to verify if the results match the expectations.

[shengbinxu]

@MatrixEditor do you have any suggestion?

[MatrixEditor]

First of all, it looks like you are not using v0.11 which fixes some issues. Nevertheless, the issue is related to an attribute which is usually present in generated Java classes. This one is important, because the old version and new GUI depend on it to display a struct graphically.

You can generate a Java file manually and compare it with your file to find missing fields.

[shengbinxu]

First of all, it looks like you are not using v0.11 which fixes some issues. Nevertheless, the issue is related to an attribute which is usually present in generated Java classes. This one is important, because the old version and new GUI depend on it to display a struct graphically.

You can generate a Java file manually and compare it with your file to find missing fields.
Thank you for your enthusiastic reply!

I'm a bit confused.

1. Which library version does v0.11 refer to?

[MatrixEditor]

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