objectscript-users

[Objectscript-users] Java integration problem

[Josef J. <Jos...@fr...>]

Hello list,

Since I can't acces the list archives (which appear to be completely =
non-functional by the way), I'm posting this directly to this list.

I have a script file that extends a java class and overloads a java =
function in that class, "generateAtis(MetarData metarData)"

Suppose you have this java snippet:

         MetarData myMetarData =3D MetarInput.readMetarXML(inputXML);
         Scope outputScope =3D new BasicScope(OscriptInterpreter.getGlobalS=
cope());
         OscriptInterpreter.eval( readScriptFile("scripts/AtisOutput.os"), =
outputScope );
         OscriptInterpreter.eval("metarData;", outputScope).opAssign(JavaBr=
idge.convertToScriptObject(myMetarData));
         Value oScript =3D OscriptInterpreter.eval("(new ScriptedAtisOutput=
()).generateAtis(metarData)", outputScope);

Also suppose that "var metarData;" is set in the script file that is =
evaluated. The eval of "metarData" that I use to convert (or wrap) the =
java object myMetarData to the script object metarData fails.

The error message:
oscript.exceptions.PackagedScriptObjectException: NoSuchMemberException: =
no such member: (undefined): =3D


Any ideas? I have a very hard time digging through the documentation as =
there are near zero actual java integration examples. Most of the examples =
deal with script code, and writing whole applications in script.

I'm grateful for any and all help or pointers you could give me.



regards,


=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
DI (FH) Josef Jahn
Product Development Expert smartStrips

Tower and Airport Solutions
FREQUENTIS GmbH
Wolfganggasse 58-60
A-1120 Vienna, Austria
Tel.:  (+43) - 1 - 811 50 - 3222

e-mail: Jos...@fr...=20
home page:  www.taptools.com
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Re: [Objectscript-users] Java integration problem

[Rob C. <ro...@ti...>]

On Sep 13, 2004, at 4:12 AM, Josef JAHN wrote:

> Hello list,
>
> Since I can't acces the list archives (which appear to be completely 
> non-functional by the way), I'm posting this directly to this list.
>
> I have a script file that extends a java class and overloads a java 
> function in that class, "generateAtis(MetarData metarData)"
>
> Suppose you have this java snippet:
>
>          MetarData myMetarData = MetarInput.readMetarXML(inputXML);
>          Scope outputScope = new 
> BasicScope(OscriptInterpreter.getGlobalScope());
>          OscriptInterpreter.eval( 
> readScriptFile("scripts/AtisOutput.os"), outputScope );
>          OscriptInterpreter.eval("metarData;", 
> outputScope).opAssign(JavaBridge.convertToScriptObject(myMetarData));
>          Value oScript = OscriptInterpreter.eval("(new 
> ScriptedAtisOutput()).generateAtis(metarData)", outputScope);
>
> Also suppose that "var metarData;" is set in the script file that is 
> evaluated. The eval of "metarData" that I use to convert (or wrap) the 
> java object myMetarData to the script object metarData fails.
>
> The error message:
> oscript.exceptions.PackagedScriptObjectException: 
> NoSuchMemberException: no such member: (undefined): =

Hmm, try using lookupInScope instead:

   outputScope.lookupInScope("metarData").opAssign(...);

or, if you want to also create metarData from java:

   outputScope.createMember( "metarData", 0 ).opAssign(...);

The problem, I think, is that the eval() is returning the value of 
metarData, rather than a reference to metarData

> Any ideas? I have a very hard time digging through the documentation 
> as there are near zero actual java integration examples. Most of the 
> examples deal with script code, and writing whole applications in 
> script.

yeah, I apologize... I will try to find some time to update and enhance 
the java integration docs

----------------------
Rob Clark
Texas Instruments, Inc.
(858)552-2946
ro...@ti...
----------------------