[Octave-task-tracker] [task #12601] Octave/Matlab differences regarding Java

[Rik]

URL:
  <http://savannah.gnu.org/task/?12601>

                 Summary: Octave/Matlab differences regarding Java
                 Project: GNU Octave
            Submitted by: rik5
            Submitted on: Sat 04 May 2013 03:35:40 PM PDT
         Should Start On: Sat 04 May 2013 12:00:00 AM PDT
   Should be Finished on: Sat 04 May 2013 12:00:00 AM PDT
                Category: Wish
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
           Fixed Release: None
         Planned Release: None

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Details:

This is a list of incompatibilities between the Java implementation in Matlab
and the current implementation in the development version of core Octave (not
the Java package from Octave Forge).  This is a laundry list which I haven't
prioritized.

im2java() function is missing

javaaddpath (-end) functionality
Requires 'clear -java' to clear out any old objects

javaclasspath (path) functionality.
path is string or cell array of strings
path is converted to absolute from relative.
Requires 'clear -java' to clear out any old objects
javaclasspath (path1, path2) functionality.

java/dlgtest.m should be removed and tests put in %!demo or %!test blocks
for each dialog class (warning, error, etc.)

Need to figure out how to call
x = java.lang.Double (4.2) directly
This would probable be a parser change and might have to wait until the
classdef branch is merged to default.

box C++ routine needs to support JavaArrays such as listdlg returning []int.

Is linear indexing of Java Array allowed by Matlab?
When indexing a Java Array is a vector of the same dimension as the original
matrix returned?
x = javaArray ('java.lang.Boolean', [2 3])
y = x(1)
size (y)
Should size be 1x3 as in original array, or does it not matter and 3x1
(current value) is fine.

unbox routine, does it correctly handle signed versus unsigned?

resize() method for java_object arrays needed in ov-java.cc.

disp() for primitive objects should be better.  For example, Matlab is able to
display a javaArray when the type is of type java.lang.Double.

*SUPPPORT* for method(obj) syntax.
Matlab supports either obj.method() or method(obj) without use of javaMethod
call.

clear needs a '-java' option
clear needs a '-mex' option

javachk.m needs implementation
http://www.mathworks.com/help/matlab/ref/javachk.html

The following routines need to be overloaded in ov-java.cc.
double (jobj) needs to be overloaded
char (job) needs to be overloaded for arrays of strings/stringbuffers.
It currently returns a cellstr which is awfully close to what is required.
struct (job) needs to be overloaded
cell (javaArray) needs to be overloaded

exist needs to be overloaded to return 8 for Java class

which expanded to cover Java methods





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