Thread: [Objectscript-users] retrieve full package from Value

Hi,

I'm working on an application having the Oscript interpreter embedded. I
have a Java helper class that calls a function in a scripted object. This
function returns another scripted object back to the Java helper. How can
i get the full package name from that Value (Scope)-object?

Example:

lib/someobject.os:

public function someobject() {
  public function test() {
  }
}

lib/file.os:

public function file() {
  public function method() {

    return new pkg.lib.someobject(); <=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

  }
}

Java helper class:

AbstractFile sFile =3D OscriptInterpreter.resolve("lib/file.os", false);
OscriptInterpreter.eval(sFile, pScope);
Value objValue =3D pScope.lookupInScope("file");
Value program =3D objValue.callAsConstructor(new Value[0]);
Value func =3D program.lookupInScope("method");

Value res =3D func.callAsFunction(); <=3D=3D=3D "res" now contains the
instantiated "pkg.lib.someobject()" object. But how do i retrieve this
information from that Value-object? How do i know the package name and th=
e
object name of this Value object?

I hope my question is clear enough. Thanks for your help.

Regards,

Arjen van Efferen

Rob,

No problem. This can happen :)

Thanks for the reply. I think i will look into a solution like you
suggested. I might going to suggest some changes to the OScript codebase
anyway. Maybe i'll get back with a nice solution of some kind.

Regards,

Arjen
> Hi Arjen,
>
> sorry for the late reply... your email got lost many pages up in my
> inbox.
>
> There is not currently a way to get the package name from a Value
> object.  I guess I had never thought of this.  The main problem is
> that you could, in theory, access the same file in multiple ways.
>
> I guess something could probably be done, by having ScriptPackage not
> return the actual Value object, but rather something that extends
> AbstractValue which implements the get() method to return the actual
> value.  This way, there is a "wrapper" around the actual Value, which
> can know how it was accessed.
>
>
> -- Rob
>
>
> On Nov 3, 2005, at 4:46 AM, <ar...@va...>
> <ar...@va...> wrote:
>
>> Hi,
>>
>> I'm working on an application having the Oscript interpreter
>> embedded. I
>> have a Java helper class that calls a function in a scripted
>> object. This
>> function returns another scripted object back to the Java helper.
>> How can
>> i get the full package name from that Value (Scope)-object?
>>
>> Example:
>>
>> lib/someobject.os:
>>
>> public function someobject() {
>>   public function test() {
>>   }
>> }
>>
>> lib/file.os:
>>
>> public function file() {
>>   public function method() {
>>
>>     return new pkg.lib.someobject(); <=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>>
>>   }
>> }
>>
>> Java helper class:
>>
>> AbstractFile sFile =3D OscriptInterpreter.resolve("lib/file.os", false=
);
>> OscriptInterpreter.eval(sFile, pScope);
>> Value objValue =3D pScope.lookupInScope("file");
>> Value program =3D objValue.callAsConstructor(new Value[0]);
>> Value func =3D program.lookupInScope("method");
>>
>> Value res =3D func.callAsFunction(); <=3D=3D=3D "res" now contains the
>> instantiated "pkg.lib.someobject()" object. But how do i retrieve this
>> information from that Value-object? How do i know the package name
>> and the
>> object name of this Value object?
>>
>> I hope my question is clear enough. Thanks for your help.
>>
>> Regards,
>>
>> Arjen van Efferen
>>
>>
>> -------------------------------------------------------
>> SF.Net email is sponsored by:
>> Tame your development challenges with Apache's Geronimo App Server.
>> Download
>> it for free - -and be entered to win a 42" plasma tv or your very own
>> Sony(tm)PSP.  Click here to play: http://sourceforge.net/geronimo.php
>> _______________________________________________
>> Objectscript-users mailing list
>> Obj...@li...
>> https://lists.sourceforge.net/lists/listinfo/objectscript-users
>
> -- Rob
>
> ____________________
> CONTACT INFORMATION:
> email:    ro...@ti...
> IM:   rob@sandjabber
> desk: 1 858 552 2946
> cell: 1 619 300 9661
>
>
>
>

ok, sounds good... I think, start by having a look at  
AbstractReference (sorry, not AbstractValue, I typed too fast)... you  
can use this to create a "proxy" for the actual script package Value,  
which contains the additional information about how it is referenced.


On Nov 17, 2005, at 3:29 AM, <ar...@va...>  
<ar...@va...> wrote:

> Rob,
>
> No problem. This can happen :)
>
> Thanks for the reply. I think i will look into a solution like you
> suggested. I might going to suggest some changes to the OScript  
> codebase
> anyway. Maybe i'll get back with a nice solution of some kind.
>
> Regards,
>
> Arjen
>> Hi Arjen,
>>
>> sorry for the late reply... your email got lost many pages up in my
>> inbox.
>>
>> There is not currently a way to get the package name from a Value
>> object.  I guess I had never thought of this.  The main problem is
>> that you could, in theory, access the same file in multiple ways.
>>
>> I guess something could probably be done, by having ScriptPackage not
>> return the actual Value object, but rather something that extends
>> AbstractValue which implements the get() method to return the actual
>> value.  This way, there is a "wrapper" around the actual Value, which
>> can know how it was accessed.
>>
>>
>> -- Rob
>>
>>
>> On Nov 3, 2005, at 4:46 AM, <ar...@va...>
>> <ar...@va...> wrote:
>>
>>> Hi,
>>>
>>> I'm working on an application having the Oscript interpreter
>>> embedded. I
>>> have a Java helper class that calls a function in a scripted
>>> object. This
>>> function returns another scripted object back to the Java helper.
>>> How can
>>> i get the full package name from that Value (Scope)-object?
>>>
>>> Example:
>>>
>>> lib/someobject.os:
>>>
>>> public function someobject() {
>>>   public function test() {
>>>   }
>>> }
>>>
>>> lib/file.os:
>>>
>>> public function file() {
>>>   public function method() {
>>>
>>>     return new pkg.lib.someobject(); <===========
>>>
>>>   }
>>> }
>>>
>>> Java helper class:
>>>
>>> AbstractFile sFile = OscriptInterpreter.resolve("lib/file.os",  
>>> false);
>>> OscriptInterpreter.eval(sFile, pScope);
>>> Value objValue = pScope.lookupInScope("file");
>>> Value program = objValue.callAsConstructor(new Value[0]);
>>> Value func = program.lookupInScope("method");
>>>
>>> Value res = func.callAsFunction(); <=== "res" now contains the
>>> instantiated "pkg.lib.someobject()" object. But how do i retrieve  
>>> this
>>> information from that Value-object? How do i know the package name
>>> and the
>>> object name of this Value object?
>>>
>>> I hope my question is clear enough. Thanks for your help.
>>>
>>> Regards,
>>>
>>> Arjen van Efferen
>>>
>>>
>>> -------------------------------------------------------
>>> SF.Net email is sponsored by:
>>> Tame your development challenges with Apache's Geronimo App Server.
>>> Download
>>> it for free - -and be entered to win a 42" plasma tv or your very  
>>> own
>>> Sony(tm)PSP.  Click here to play: http://sourceforge.net/ 
>>> geronimo.php
>>> _______________________________________________
>>> Objectscript-users mailing list
>>> Obj...@li...
>>> https://lists.sourceforge.net/lists/listinfo/objectscript-users
>>
>> -- Rob
>>
>> ____________________
>> CONTACT INFORMATION:
>> email:    ro...@ti...
>> IM:   rob@sandjabber
>> desk: 1 858 552 2946
>> cell: 1 619 300 9661
>>
>>
>>
>>
>

-- Rob

____________________
CONTACT INFORMATION:
email:    ro...@ti...
IM:   rob@sandjabber
desk: 1 858 552 2946
cell: 1 619 300 9661