bugGNU Octave - Bugs: bug #51152, "[java]...


bug #51152: "[java] java.lang.NoSuchFieldException: ..." errors

Submitted by:  Philip Nienhuis <philipnienhuis>
Submitted on:  Thu 01 Jun 2017 06:30:23 AM UTC  
Category:  Libraries Severity:  4 - Important
Priority:  5 - Normal Item Group:  Regression
Status:  Fixed Assigned to:  None
Originator Name:  philipnienhuis Open/Closed:  Closed
Release:  dev Operating System:  Any

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( Jump to the original submission)

Fri 23 Jun 2017 06:29:43 PM UTC, comment #19: 

That's happened to me before, savannah is what it is, no big deal.

Mike Miller <mtmiller>
Project Administrator
Fri 23 Jun 2017 06:43:06 AM UTC, comment #18: 

Looking in the bug tracker archive I see that you and I probably had this bug report open simultaneously.
I suppose what happened is that you saved first with changed status; a few minutes later I did but of course with the old status still set in my browser window, unaware of the changes you just had saved.

So it looks like we need some sort of mutexes or semaphores in the bug tracker ....

Philip Nienhuis <philipnienhuis>
Project Member
Fri 23 Jun 2017 06:34:34 AM UTC, comment #17: 

Reopening wasn't on purpose, sorry.

Thanks for pushing.

Closing as fixed (now finally :-)

Philip Nienhuis <philipnienhuis>
Project Member
Fri 23 Jun 2017 02:44:43 AM UTC, comment #16: 

As promised, the other set of tests is added, pushed under your name:


Did you reopen this on purpose or accidentally? This bug is still fixed right? Fixed for me.

Mike Miller <mtmiller>
Project Administrator
Thu 22 Jun 2017 08:35:03 PM UTC, comment #15: 

Works on Windows as well (as expected).

In comment #13 I've uploaded tests for most java basic types with and w/o arguments. Interesting or not, they should work and may catch a regression we cannot think up now.
I also added an java.awt test - but I don't know if it'll work w/o a display (TTBOMK it is invisible by default anyway).

Philip Nienhuis <philipnienhuis>
Project Member
Thu 22 Jun 2017 08:16:29 PM UTC, comment #14: 

I pushed the fix onto default along with some tests combined with your string tests.


Like I said, I don't think there's much value with respect to this particular bug in testing every numeric type with similar method calls. The parser and interpreter have been exercised enough here.

I think your proposed tests do still have value as tests on their own, so I'll work those into another changeset, but not related to this bug number.

Mike Miller <mtmiller>
Project Administrator
Wed 21 Jun 2017 09:17:05 PM UTC, comment #13: 

The proposed solution works at least on Linux.
I'll also try on Windows but I can test a cross-build only tomorrow evening at the earliest.

In the mean time I attach a file with some basis tests, invoking methods with and w/o arguments.
Some editing is needed, e.g. adding %%test lines, but I don't know if you want them separate for each Java type or all together.

(file #41020)

Philip Nienhuis <philipnienhuis>
Project Member
Wed 21 Jun 2017 07:51:13 PM UTC, comment #12: 

All of my tests are on String, because there aren't really any interesting methods that take arguments for the other primitive type class wrappers (Double, Integer, Long, etc).

IMO, if we're already testing that Octave can call several methods on a String and pass arguments to those methods, I don't think it adds much value to test calling Integer.toString, or Integer.equals(another_integer).

I didn't look outside of java.lang, so please do suggest other tests based on awt, swing, or maybe java.util, container types? I don't remember much Java standard library myself. As long as it doesn't require a graphical display for the awt or swing classes.

Mike Miller <mtmiller>
Project Administrator
Wed 21 Jun 2017 07:45:33 PM UTC, comment #11: 

I think that some tests for basic Java types (double, string, float, ..) + some compound types (awt, swing, ...) would be nice.

First I'll try your proposed fix.

Status => in progress

Philip Nienhuis <philipnienhuis>
Project Member
Wed 21 Jun 2017 04:57:06 PM UTC, comment #10: 

Philip - if you don't mind, please post your test cases here, I already have a changeset with this fix and some test cases I've assembled based on the discussion here, but happy to incorporate some more.

Mike Miller <mtmiller>
Project Administrator
Wed 21 Jun 2017 04:17:23 PM UTC, comment #9: 

Thank you gentlemen for looking into this.  The XML functions in the io package were affected as well, so I'm glad this is tackled now.

I'll create a cset with some unit tests for ov-java.cc along the lines of comment #4 and comment #5 as soon as I had a chance to test & check Mike's fix.

Philip Nienhuis <philipnienhuis>
Project Member
Wed 21 Jun 2017 04:02:31 PM UTC, comment #8: 

Yeah I will push this.

I also just noticed that functions in namespaces are broken with these indexing changes also:

>> myns.myfunc (2)
error: can't perform indexing operations for user-defined function type
>> myns.myfunc
ans =

error: octave_base_value::print (): wrong type argument 'user-defined function'

but that's a separate issue, I'll post a separate report and investigate that next.

Mike Miller <mtmiller>
Project Administrator
Wed 21 Jun 2017 12:38:59 PM UTC, comment #7: 

Mike, your change seems fine.  Could you please apply it?

But you are also right that there might be a better way.  This indexing code is all a bit rough...

John W. Eaton <jwe>
Project Administrator
Wed 21 Jun 2017 05:05:17 AM UTC, comment #6: 

Philip - thanks for identifying the change that introduced this, that helped me figure out what needed to change.

The attached diff fixes this issue for me. We should add unit tests for these kinds of method calls as well to make sure this is caught in the future.

jwe, if you're browsing - this change is a little sloppy, maybe we need to add a new method to octave_value for a type that is either a class or a classdef or a java object, for behaviors like this that all 3 have in common?

(file #40960)

Mike Miller <mtmiller>
Project Administrator
Mon 12 Jun 2017 06:50:26 PM UTC, comment #5: 

Confirmed here, any Java method that takes one or more arguments seems to hit this. Any method that takes no arguments works.

>> s = javaObject ("java.lang.String", "asdf");
>> s.length
ans =  4
>> s.trim
ans = asdf
>> s.toString
ans = asdf
>> s.charAt (0)
error: [java] java.lang.NoSuchFieldException: charAt
>> s.charAt
error: [java] java.lang.NoSuchFieldException: charAt

Mike Miller <mtmiller>
Project Administrator
Fri 09 Jun 2017 06:37:10 PM UTC, comment #4: 

A simpler test case that can be included in Octave's test suite:

>> jstr = javaObject ("java.lang.String", "some string")
jstr =

<Java object: java.lang.String>

## errors out now, but should work:
>> jstr.matches ("some other string")
error: [java] java.lang.NoSuchFieldException: matches
## works fine:
>> javaMethod ("matches", jstr, "some other string")
ans = 0

Philip Nienhuis <philipnienhuis>
Project Member
Fri 09 Jun 2017 06:29:39 PM UTC, comment #3: 

Maybe a clue:

I found that the

"object.method ()"

syntax doesn't work anymore, but

javaMethod ("method", object, <args>)

still works fine.

Philip Nienhuis <philipnienhuis>
Project Member
Thu 01 Jun 2017 05:56:03 PM UTC, comment #2: 
Philip Nienhuis <philipnienhuis>
Project Member
Thu 01 Jun 2017 09:20:43 AM UTC, comment #1: 

Further bisecting reveals that cset 551fa3879615 ("improve compatibility and simplify evaluation of index expressions") is the culprit.

A little easier way to reproduce (still needs an external Java jar):

For jopendocument (.ods):

javaaddpath ("</full/path/to/jopendocument.jar>")

jopendoc = "org.jopendocument.dom.spreadsheet.SpreadSheet";
## Create an empty 2 x 2 default TableModel template
tmodel= javaObject ("javax.swing.table.DefaultTableModel", 2, 2);
wb = javaMethod ("createEmpty", jopendoc, tmodel);

## Show nr. of sheets
wb.getSheetCount ()

## Offending statement
wb.getSheet (1)

....which gives.....
>> sh = wb.getSheet (1)
error: [java] java.lang.NoSuchFieldException: getSheet


>> methods (wb)
Methods for class org.jopendocument.dom.spreadsheet.SpreadSheet:
org.jopendocument.dom.spreadsheet.Sheet getSheet(java.lang.String, boolean) throws java.util.NoSuchElementException
org.jopendocument.dom.spreadsheet.Sheet getSheet(int)

Philip Nienhuis <philipnienhuis>
Project Member
Thu 01 Jun 2017 06:30:23 AM UTC, original submission:  

With current dev version, the Java-based spreadsheet I/O functions in the io package don't work anymore.
As I don't run the io package test scripts regularly (while I do "make check" on every core Octave build) it took me a little while before I noticed.

Tracking down it turns out that some Java functions in external Java class libraries no longer work, while others still function fine.
After some "bisecting" I found that this has happened between csets 9f925aed7d1b and d2748870db4e.

To reproduce one or more of the Java class libs for spreadsheet I/O are needed; e.g., jExcelApi (for .xls files) or jOpendocument (for .ods files)  (btw, these libraries are GPL; can they be attached to a bug report?)

## <install & load io package 2.4.7>
javaaddpath (</full/path/to/jxl.jar>)
io_xls_testscript ("jxl")
>> io_xls_testscript ("jxl")

Testing .xls interface JXL using file io-test.xls...

1. Initialize arrays.

2. Insert first empty sheet.
Checking requested interface(s):
JXL*; (* = default interface)

[java] java.lang.NoSuchFieldException: getSheet


## <install & load io package 2.4.7>
javaaddpath (</full/path/to/jopendocument.jar>)
>> io_ods_testscript ("jod")

Testing .ods interface JOD using file io-test.ods...

1. Initialize arrays.

2. Insert first empty sheet.
Checking requested interface(s):
JOD*; (* = default interface)

[java] java.lang.NoSuchFieldException: getSheet

After going back to before the mentioned csets (hg update 4fe410bd918d) the above commands work fine.

I've added JWE as he's the one who made the relevant changes.

Philip Nienhuis <philipnienhuis>
Project Member


(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:

Attached Files
file #41020:  java_tests added by philipnienhuis (2KiB - application/octet-stream)
file #40960:  java.diff added by mtmiller (890B - text/x-patch)


Depends on the following items: None found

Items that depend on this one: None found


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  • -email is unavailable- added by jwe (Posted a comment)
  • -email is unavailable- added by mtmiller (Posted a comment)
  • -email is unavailable- added by philipnienhuis (Submitted the item)
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    Follow 12 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2017-06-23 philipnienhuis StatusIn Progress => Fixed
        Open/ClosedOpen => Closed
    2017-06-22 philipnienhuis StatusFixed => In Progress
        Open/ClosedClosed => Open
    2017-06-22 mtmiller StatusIn Progress => Fixed
        Open/ClosedOpen => Closed
    2017-06-21 philipnienhuis Attached File- => Added java_tests, #41020
    2017-06-21 philipnienhuis StatusConfirmed => In Progress
    2017-06-21 mtmiller Attached File- => Added java.diff, #40960
    2017-06-12 mtmiller Severity3 - Normal => 4 - Important
        StatusNone => Confirmed
    2017-06-01 philipnienhuis Carbon-Copy- => Added jwe

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