Hi,
I'm trying to set up a Java UNO bridge between Octave 3.2.4 &
OpenOffice.org (& LibreOffice 3.3.2).
It works fairly OK, I can transfer data both ways, but I get stuck while
trying to invoke a specific (OOo) method that is known to expect only
short arguments. (That method is fairly vital for efficient processing.)
This happens both with Octave-3.2.4_MinGW (Windows) & Octave-3.4.0
(Linux), w OpenOffice.org & LibreOffice, both with the (experimental)
java-1.2.8 package from svn. (AFAICS that differs from 1.2.7 mainly in
some extra Matlab-compatible methods + more documentation).
Consider the following Octave instructions (after the UNO bridge is
already operative) operating on Java object xRQ:
---------------------------------------------------------
octave-3.2.4.exe:43> xRQ
xRQ =
<Java object: $Proxy8>
## Explore which methods can be applied to variable xRQ:
octave-3.2.4.exe:44> javamethods(xRQ)
{
[1,1] = java.lang.Object queryInterface(com.sun.star.uno.Type)
[1,2] = java.lang.String getOid()
[1,3] = boolean isSame(java.lang.Object)
[1,4] = com.sun.star.sheet.XSheetCellRanges queryVisibleCells()
[1,5] = com.sun.star.sheet.XSheetCellRanges queryEmptyCells()
[1,6] = com.sun.star.sheet.XSheetCellRanges queryContentCells(short)
[1,7] = com.sun.star.sheet.XSheetCellRanges queryFormulaCells(int)
:
<snip 20+ other methods>
:
}
## Create "Short" java object.
## NB the value should be input as string (as per Javadocs)
octave-3.2.4.exe:45> Cellflgs = java_new ("java.lang.Short", "23")
Cellflgs =
<Java object: java.lang.Short>
## Check octave-java object xRQ by invoking a method listed above:
octave-3.2.4.exe:46> ecells = xRQ.queryEmptyCells
ecells =
<Java object: $Proxy9>
## ...Seems OK.
## Now try offending method which wants a "short" input argument:
octave-3.2.4.exe:47> ccells = xRQ.queryContentCells (Cellflgs)
error: [java] java.lang.NoSuchMethodException: queryContentCells
## Again, w/o argument at all:
octave-3.2.4.exe:47> ccells = xRQ.queryContentCells
error: [java] java.lang.NoSuchFieldException: queryContentCells
## (Actually, expected...)
## Try another method which expects an int:
octave-3.2.4.exe:48> xRQ.queryFormulaCells (1)
ans =
<Java object: $Proxy9>
---------------------------------------------------------
I conclude that Java object xRQ is properly formed (other methods
operate fine with it), but somehow queryContentCells() chokes on its
input argument. I tried other short values too (allowed are any logical
combination of 1, 2, 4 & 16; 23 = sum of them all).
Q1:
Do java.lang.Short objects get transformed or wrangled somehow on their
way between Octave and the actual Java method?
Q2:
If so, is there another way to get the short object to arrive properly
at the method in question (i.e., queryContentCells()) ?
Q3:
From a more general perspective, is there a way to recover the actual
Java errors hidden behind "NoSuchMethodException" messages? The latter
often functions as a general container message for many other Java errors.
Philip
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