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Calling Java from OScript

Hans Stoop

Message from Hans Stoop via eLinkI think you would be interested to know that starting from Livelink 9.6is is possible to call Java methods from OScript. From thedocumentation: The built-in functions in the JavaObject package provide the ability toaccess Java classes and services from OScript. The major functionalitiesoffered in the JavaObject package are the following:Class Methods Indexo New( String className, List parameters ) Creates a new instance of a Java class. o InvokeStaticMethod( String className, String methodName, Listparameters ) Invokes a static method defined for a Java class. o GetStaticField( String className, String fieldName ) Returns the value of a static field. o SetStaticField( String className, String fieldName, Dynmaic value ) Sets the value of a static field. o GetError() Returns the JNI exception error message from the last operation. o GetErrorStack() Returns a List for the stack trace associated with an exception inthe last JNI operation. Instance Methods Indexo InvokeMethod( String methodName, List parameters ) Invokes an instance method defined for a Java class. o GetField( String fieldName ) Returns the value of an instance field. o SetField( String fieldName, Dynamic value ) Sets the value of an instance field. Hans

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Rolf_Poser_(eu0018377_-_(deleted))

Message from Rolf Poser via eLinkHans:I agree - this is interesting, in fact it is exciting !I think it's 9.6's best-kept secret, but one that will ultimately have avery positive effect on the development effort. Here are just a few ideasof what becomes instantly more possible:- Using an open source library (LGPL or less restrictive) to enhance eLinkto access all types of mailboxes, not only POP3. This should actually meanless oscript to maintain.- Using an open source library to do web service calls. XML in oscript isvery manual, and SOAP would be doubly so, so using something"off-the-shelf" would make life a lot simpler for that kind of scenario.Regards,Rolf.> Calling Java from OScript> Posted by Stoop, Hans on 08/30/2006 04:20 PM>> Message from Hans Stoop via eLink>>> I think you would be interested to know that starting from Livelink 9.6> is is possible to call Java methods from OScript. From the> documentation:>> The built-in functions in the JavaObject package provide the ability to> access Java classes and services from OScript. The major functionalities> offered in the JavaObject package are the following:>> Class Methods Index>> o New( String className, List parameters )> Creates a new instance of a Java class.>> o InvokeStaticMethod( String className, String methodName, List> parameters )> Invokes a static method defined for a Java class.>> o GetStaticField( String className, String fieldName )> Returns the value of a static field.>> o SetStaticField( String className, String fieldName, Dynmaic value )> Sets the value of a static field.>> o GetError()> Returns the JNI exception error message from the last operation.>> o GetErrorStack()> Returns a List for the stack trace associated with an exception in> the last JNI operation.>> Instance Methods Index>> o InvokeMethod( String methodName, List parameters )> Invokes an instance method defined for a Java class.>> o GetField( String fieldName )> Returns the value of an instance field.>> o SetField( String fieldName, Dynamic value )> Sets the value of an instance field.>> Hans>> [To reply to this thread, use your normal E-mail reply function.]>> ============================================================>> Discussion: Development Discussion> https://knowledge.opentext.com/knowledge/llisapi.dll/open/786303>> Livelink Server:> https://knowledge.opentext.com/knowledge/llisapi.dll>> To Unsubscribe from this Discussion, send an e-mail to> unsubscribe.development@elinkkc.opentext.com.>>>

Hans Stoop

Message from Hans Stoop via eLinkI also find it exciting. I was thinking of using JDBC to connect toother repositories. Hans> -----Original Message-----> From: eLink Discussion: Development Discussion > [mailto:development@elinkkc.opentext.com] > Sent: donderdag 31 augustus 2006 7:47> To: eLink Recipient> Subject: Re Calling Java from OScript> > Re Calling Java from OScript> Posted by Poser, Rolf H on 08/31/2006 01:46 AM> > Message from Rolf Poser via eLink> > Hans:> > I agree - this is interesting, in fact it is exciting !> > I think it's 9.6's best-kept secret, but one that will > ultimately have a very positive effect on the development > effort. Here are just a few ideas of what becomes instantly > more possible:> > - Using an open source library (LGPL or less restrictive) to > enhance eLink to access all types of mailboxes, not only > POP3. This should actually mean less oscript to maintain.> - Using an open source library to do web service calls. XML > in oscript is very manual, and SOAP would be doubly so, so > using something "off-the-shelf" would make life a lot simpler > for that kind of scenario.> > > > Regards,> Rolf.> > > Calling Java from OScript> > Posted by Stoop, Hans on 08/30/2006 04:20 PM> >> > Message from Hans Stoop via eLink> >> >> > I think you would be interested to know that starting from Livelink > > 9.6 is is possible to call Java methods from OScript. From the> > documentation:> >> > The built-in functions in the JavaObject package provide > the ability > > to access Java classes and services from OScript. The major > > functionalities offered in the JavaObject package are the following:> >> > Class Methods Index> >> > o New( String className, List parameters )> > Creates a new instance of a Java class.> >> > o InvokeStaticMethod( String className, String methodName, List > > parameters )> > Invokes a static method defined for a Java class.> >> > o GetStaticField( String className, String fieldName )> > Returns the value of a static field.> >> > o SetStaticField( String className, String fieldName, > Dynmaic value )> > Sets the value of a static field.> >> > o GetError()> > Returns the JNI exception error message from the last operation.> >> > o GetErrorStack()> > Returns a List for the stack trace associated with an > exception in > > the last JNI operation.> >> > Instance Methods Index> >> > o InvokeMethod( String methodName, List parameters )> > Invokes an instance method defined for a Java class.> >> > o GetField( String fieldName )> > Returns the value of an instance field.> >> > o SetField( String fieldName, Dynamic value )> > Sets the value of an instance field.> >> > Hans> >> > [To reply to this thread, use your normal E-mail reply function.]> >> > ============================================================> >> > Discussion: Development Discussion> > https://knowledge.opentext.com/knowledge/llisapi.dll/open/786303> >> > Livelink Server:> > https://knowledge.opentext.com/knowledge/llisapi.dll> >> > To Unsubscribe from this Discussion, send an e-mail to > > unsubscribe.development@elinkkc.opentext.com.> >> >> >> > [To reply to this thread, use your normal E-mail reply function.]> > ============================================================> > Topic: Calling Java from OScript> https://knowledge.opentext.com/knowledge/llisapi.dll/open/7702825> > Discussion: Development Discussion> https://knowledge.opentext.com/knowledge/llisapi.dll/open/786303> > Livelink Server:> https://knowledge.opentext.com/knowledge/llisapi.dll> > To Unsubscribe from this Discussion, send an e-mail to > unsubscribe.development@elinkkc.opentext.com.> > >

Jonny_Coombes

Message from Jonny Coombes via eLinkMessage from <> via eLink

eLink

The parameters that you pass into the Java object – are theymarshalled through to your Java class as LLValues? Has anyone experimentedwith this yet?

JonnyCoombes Bsc (Hons)
Principal Solutions Architect
Open Text Corporation

Mobile: +44 (0) 7748 986 937

Phone:+44 (0) 1494 679700

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The market leader in providing
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This e-mail is protected by domestic and international copyright laws andtreaties and is the property of Open Text Corporation, it may containconfidential and/or trade secret information of the Open Text Corporationand/or its subsidiaries (OTC), and may be subject to legal privilege in favorof OTC. This e-mail may only be lawfully received, accessed, displayed on acomputer screen, printed, copied, and/or used by the specific addressee(s)named above (“Authorized Recipient”) for the purpose for which it was sent byOTC. All other rights and licenses to this e-mail are fully reserved to OTC. Ifyou are not an Authorized Recipient, you are required to immediately deletethis e-mail in its entirety without printing, copying, using, and/orre-transmitting this e-mail, either in whole or in part. The transmission ofthis e-mail by OTC is not to be construed as a waiver by OTC and/or theindividual sending this e-mail on behalf of OTC of any of their respectiverights or privileges at law or otherwise, howsoever arising.

From: eLinkDiscussion: Development Discussion [mailto:development@elinkkc.opentext.com]
Sent: 31 August 2006 07:43
To: eLink Recipient
Subject: RE Re Calling Java from OScript

RE Re Calling Java from OScript		Posted by hstoop (Stoop, Hans) on 08/31/2006 02:42 AM
In reply to: Re Calling Java from OScript		Posted by eu0018377 (Poser, Rolf H) on 08/31/2006 01:46 AM

Message from Hans Stoop <hstoop@opentext.com> via eLink

I also find it exciting. I was thinking of using JDBC to connect to
other repositories.

Hans

> -----Original Message-----
> From: eLink Discussion: Development Discussion
> [mailto:development@elinkkc.opentext.com]
> Sent: donderdag 31 augustus 2006 7:47
> To: eLink Recipient
> Subject: Re Calling Java from OScript
>
> Re Calling Java from OScript
> Posted by Poser, Rolf H on 08/31/2006 01:46 AM
>
> Message from Rolf Poser <rolf@stasolutions.co.za> via eLink
>
> Hans:
>
> I agree - this is interesting, in fact it is exciting !
>
> I think it's 9.6's best-kept secret, but one that will
> ultimately have a very positive effect on the development
> effort. Here are just a few ideas of what becomes instantly
> more possible:
>
> - Using an open source library (LGPL or less restrictive) to
> enhance eLink to access all types of mailboxes, not only
> POP3. This should actually mean less oscript to maintain.
> - Using an open source library to do web service calls. XML
> in oscript is very manual, and SOAP would be doubly so, so
> using something "off-the-shelf" would make life a lot simpler
> for that kind of scenario.
>
>
>
> Regards,
> Rolf.
>
> > Calling Java from OScript
> > Posted by Stoop, Hans on 08/30/2006 04:20 PM
> >
> > Message from Hans Stoop <hstoop@opentext.com> via eLink
> >
> >
> > I think you would be interested to know that starting from Livelink
> > 9.6 is is possible to call Java methods from OScript. From the
> > documentation:
> >
> > The built-in functions in the JavaObject package provide
> the ability
> > to access Java classes and services from OScript. The major
> > functionalities offered in the JavaObject package are the following:
> >
> > Class Methods Index
> >
> > o New( String className, List parameters )
> > Creates a new instance of a Java class.
> >
> > o InvokeStaticMethod( String className, String methodName, List
> > parameters )
> > Invokes a static method defined for a Java class.
> >
> > o GetStaticField( String className, String fieldName )
> > Returns the value of a static field.
> >
> > o SetStaticField( String className, String fieldName,
> Dynmaic value )
> > Sets the value of a static field.
> >
> > o GetError()
> > Returns the JNI exception error message from the last operation.
> >
> > o GetErrorStack()
> > Returns a List for the stack trace associated with an
> exception in
> > the last JNI operation.
> >
> > Instance Methods Index
> >
> > o InvokeMethod( String methodName, List parameters )
> > Invokes an instance method defined for a Java class.
> >
> > o GetField( String fieldName )
> > Returns the value of an instance field.
> >
> > o SetField( String fieldName, Dynamic value )
> > Sets the value of an instance field.
> >
> > Hans
> >
> > [To reply to this thread, use your normal E-mail reply function.]
> >
> > ============================================================
> >
> > Discussion: Development Discussion
> > https://knowledge.opentext.com/knowledge/llisapi.dll/open/786303
> >
> > Livelink Server:
> > https://knowledge.opentext.com/knowledge/llisapi.dll
> >
> > To Unsubscribe from this Discussion, send an e-mail to
> > unsubscribe.development@elinkkc.opentext.com.
> >
> >
> >
>
> [To reply to this thread, use your normal E-mail reply function.]
>
> ============================================================
>
> Topic: Calling Java from OScript
> https://knowledge.opentext.com/knowledge/llisapi.dll/open/7702825
>
> Discussion: Development Discussion
> https://knowledge.opentext.com/knowledge/llisapi.dll/open/786303
>
> Livelink Server:
> https://knowledge.opentext.com/knowledge/llisapi.dll
>
> To Unsubscribe from this Discussion, send an e-mail to
> unsubscribe.development@elinkkc.opentext.com.
>
>
>

[To reply to this thread, use your normal E-mail reply function.]
Topic:	Calling Java from OScript
Discussion:	Development Discussion
Livelink Server:	Knowledge Center

To Unsubscribe from this Discussion, send an e-mail to unsubscribe.development@elinkkc.opentext.com.

Rolf_Poser_(eu0018377_-_(deleted))

Message from Rolf Poser via eLinkSnap!I was thinking of that in the shower just now, but a little more radical -perhaps rewrite the whole of Livelink to not use CAPI/DAPI/UAPI/WAPI, buta set of JavaObject equivalents to do the DB work.That way one could also use MySQL/postgresSQL or perhaps even SQLite withLivelink. But that would of course be totally unsupported... ;-)There are pretty good JDBC and native drivers out there for most DBs, sowhy re-invent the wheel.Then one could also do an OHibernate and an OSpring but that may bepushing it a bit... ;-)Regards,Rolf.> RE Re Calling Java from OScript> Posted by Stoop, Hans on 08/31/2006 02:42 AM>> Message from Hans Stoop via eLink>>> I also find it exciting. I was thinking of using JDBC to connect to> other repositories.>> Hans>>> -----Original Message----->> From: eLink Discussion: Development Discussion>> [mailto:development@elinkkc.opentext.com]>> Sent: donderdag 31 augustus 2006 7:47>> To: eLink Recipient>> Subject: Re Calling Java from OScript>>>> Re Calling Java from OScript>> Posted by Poser, Rolf H on 08/31/2006 01:46 AM>>>> Message from Rolf Poser via eLink>>>> Hans:>>>> I agree - this is interesting, in fact it is exciting !>>>> I think it's 9.6's best-kept secret, but one that will>> ultimately have a very positive effect on the development>> effort. Here are just a few ideas of what becomes instantly>> more possible:>>>> - Using an open source library (LGPL or less restrictive) to>> enhance eLink to access all types of mailboxes, not only>> POP3. This should actually mean less oscript to maintain.>> - Using an open source library to do web service calls. XML>> in oscript is very manual, and SOAP would be doubly so, so>> using something "off-the-shelf" would make life a lot simpler>> for that kind of scenario.>>>>>>>> Regards,>> Rolf.>>>> > Calling Java from OScript>> > Posted by Stoop, Hans on 08/30/2006 04:20 PM>> >>> > Message from Hans Stoop via eLink>> >>> >>> > I think you would be interested to know that starting from Livelink>> > 9.6 is is possible to call Java methods from OScript. From the>> > documentation:>> >>> > The built-in functions in the JavaObject package provide>> the ability>> > to access Java classes and services from OScript. The major>> > functionalities offered in the JavaObject package are the following:>> >>> > Class Methods Index>> >>> > o New( String className, List parameters )>> > Creates a new instance of a Java class.>> >>> > o InvokeStaticMethod( String className, String methodName, List>> > parameters )>> > Invokes a static method defined for a Java class.>> >>> > o GetStaticField( String className, String fieldName )>> > Returns the value of a static field.>> >>> > o SetStaticField( String className, String fieldName,>> Dynmaic value )>> > Sets the value of a static field.>> >>> > o GetError()>> > Returns the JNI exception error message from the last operation.>> >>> > o GetErrorStack()>> > Returns a List for the stack trace associated with an>> exception in>> > the last JNI operation.>> >>> > Instance Methods Index>> >>> > o InvokeMethod( String methodName, List parameters )>> > Invokes an instance method defined for a Java class.>> >>> > o GetField( String fieldName )>> > Returns the value of an instance field.>> >>> > o SetField( String fieldName, Dynamic value )>> > Sets the value of an instance field.>> >>> > Hans>> >>> > [To reply to this thread, use your normal E-mail reply function.]>> >>> > ============================================================>> >>> > Discussion: Development Discussion>> > https://knowledge.opentext.com/knowledge/llisapi.dll/open/786303>> >>> > Livelink Server:>> > https://knowledge.opentext.com/knowledge/llisapi.dll>> >>> > To Unsubscribe from this Discussion, send an e-mail to>> > unsubscribe.development@elinkkc.opentext.com.>> >>> >>> >>>>> [To reply to this thread, use your normal E-mail reply function.]>>>> ============================================================>>>> Topic: Calling Java from OScript>> https://knowledge.opentext.com/knowledge/llisapi.dll/open/7702825>>>> Discussion: Development Discussion>> https://knowledge.opentext.com/knowledge/llisapi.dll/open/786303>>>> Livelink Server:>> https://knowledge.opentext.com/knowledge/llisapi.dll>>>> To Unsubscribe from this Discussion, send an e-mail to>> unsubscribe.development@elinkkc.opentext.com.>>>>>>>> [To reply to this thread, use your normal E-mail reply function.]>> ============================================================>> Topic: Calling Java from OScript> https://knowledge.opentext.com/knowledge/llisapi.dll/open/7702825>> Discussion: Development Discussion> https://knowledge.opentext.com/knowledge/llisapi.dll/open/786303>> Livelink Server:> https://knowledge.opentext.com/knowledge/llisapi.dll>> To Unsubscribe from this Discussion, send an e-mail to> unsubscribe.development@elinkkc.opentext.com.>>>

Hans Stoop

Message from Hans Stoop via eLink I assume and hope that is the case, otherwise you are restricted tocommon variable types.I haven't experienced with it yet.This will mean that you need to write your own OScript interface classin Java. Probably along the lines of the 'old' drop-in technology.Hans> -----Original Message-----> From: eLink Discussion: Development Discussion > [mailto:development@elinkkc.opentext.com] > Sent: donderdag 31 augustus 2006 8:53> To: eLink Recipient> Subject: RE RE Re Calling Java from OScript> > > Message from Jonny Coombes via eLink Message from <> via eLink>The parameters that you pass into the Java object - are they marshalledthrough to your Java class as LLValues? Has anyone experimented withthis yet?

eLink User

Message from Carsten Kulms via eLinkI played a little bit with it, actually just one fast 'n dirty test.I can confirm that it works very well.However, the documentation can be improved. E.g. I had to figure out byexperiments where to place my classes: It worked to place them under{LES install dir}/javaserver/libThis seems be to included in the classpath by default.Currently I don't know how to deploy a JAR with own classes.Are JARs found in a dedicated directory automatically included in theclasspath?

Rolf_Poser_(eu0018377_-_(deleted))

Message from Rolf Poser via eLinkAs far as I can tell, they are native types, not LLValues.But I haven't experimented with all types, so I don't know whether e.g.Date would convert seamlessly.Attached please find a very very basic and laughably corny example that Idid for fun a while back:- An oscript module that calls a java class - not accessible throughBuilder at runtime due to the javaserver not being available.- The Java class HelloWorld.java in the src directoryCompile the latter, build into JOExample.jar and drop into ..\javaserver\libThe test is called from the Globals Startup of the module.Have fun - and this is licensed under the Apache 2 license, so go aheadand re-use as appropriate.An interface class would probably be the better route to go.Regards,Rolf.> RE RE RE Re Calling Java from OScript> Posted by Stoop, Hans on 08/31/2006 03:39 AM>> Message from Hans Stoop via eLink>>> I assume and hope that is the case, otherwise you are restricted to> common variable types.> I haven't experienced with it yet.>> This will mean that you need to write your own OScript interface class> in Java. Probably along the lines of the 'old' drop-in technology.>> Hans>>> -----Original Message----->> From: eLink Discussion: Development Discussion>> [mailto:development@elinkkc.opentext.com]>> Sent: donderdag 31 augustus 2006 8:53>> To: eLink Recipient>> Subject: RE RE Re Calling Java from OScript>>>>>> Message from Jonny Coombes via eLink Message from <> via eLink>>>The parameters that you pass into the Java object - are they marshalled> through to your Java class as LLValues? Has anyone experimented with> this yet?>> [To reply to this thread, use your normal E-mail reply function.]>> ============================================================>> Topic: Calling Java from OScript> https://knowledge.opentext.com/knowledge/llisapi.dll/open/7702825>> Discussion: Development Discussion> https://knowledge.opentext.com/knowledge/llisapi.dll/open/786303>> Livelink Server:> https://knowledge.opentext.com/knowledge/llisapi.dll>> To Unsubscribe from this Discussion, send an e-mail to> unsubscribe.development@elinkkc.opentext.com.>>>

Rolf_Poser_(eu0018377_-_(deleted))

Message from Rolf Poser via eLinkSorry, I meant Root Startup, not Globals startup!> Re RE RE RE Re Calling Java from OScript> Posted by Poser, Rolf H on 08/31/2006 04:20 AM>> Message from Rolf Poser via eLink>> As far as I can tell, they are native types, not LLValues.>> But I haven't experimented with all types, so I don't know whether e.g.> Date would convert seamlessly.>> Attached please find a very very basic and laughably corny example that I> did for fun a while back:>> - An oscript module that calls a java class - not accessible through> Builder at runtime due to the javaserver not being available.> - The Java class HelloWorld.java in the src directory>> Compile the latter, build into JOExample.jar and drop into> ..\javaserver\lib>> The test is called from the Globals Startup of the module.>> Have fun - and this is licensed under the Apache 2 license, so go ahead> and re-use as appropriate.>> An interface class would probably be the better route to go.>> Regards,> Rolf.>>>>> RE RE RE Re Calling Java from OScript>> Posted by Stoop, Hans on 08/31/2006 03:39 AM>>>> Message from Hans Stoop via eLink>>>>>> I assume and hope that is the case, otherwise you are restricted to>> common variable types.>> I haven't experienced with it yet.>>>> This will mean that you need to write your own OScript interface class>> in Java. Probably along the lines of the 'old' drop-in technology.>>>> Hans>>>>> -----Original Message----->>> From: eLink Discussion: Development Discussion>>> [mailto:development@elinkkc.opentext.com]>>> Sent: donderdag 31 augustus 2006 8:53>>> To: eLink Recipient>>> Subject: RE RE Re Calling Java from OScript>>>>>>>>> Message from Jonny Coombes via eLink Message from <> via eLink>>>>>The parameters that you pass into the Java object - are they marshalled>> through to your Java class as LLValues? Has anyone experimented with>> this yet?>>>> [To reply to this thread, use your normal E-mail reply function.]>>>> ============================================================>>>> Topic: Calling Java from OScript>> https://knowledge.opentext.com/knowledge/llisapi.dll/open/7702825>>>> Discussion: Development Discussion>> https://knowledge.opentext.com/knowledge/llisapi.dll/open/786303>>>> Livelink Server:>> https://knowledge.opentext.com/knowledge/llisapi.dll>>>> To Unsubscribe from this Discussion, send an e-mail to>> unsubscribe.development@elinkkc.opentext.com.>>>>>>>> [To reply to this thread, use your normal E-mail reply function.]>> ============================================================>> Attachment link: joexample_1_0_0.zip> https://knowledge.opentext.com/knowledge/llisapi.dll/open/7702835>> ============================================================>> Topic: Calling Java from OScript> https://knowledge.opentext.com/knowledge/llisapi.dll/open/7702825>> Discussion: Development Discussion> https://knowledge.opentext.com/knowledge/llisapi.dll/open/786303>> Livelink Server:> https://knowledge.opentext.com/knowledge/llisapi.dll>> To Unsubscribe from this Discussion, send an e-mail to> unsubscribe.development@elinkkc.opentext.com.>>>

Howard_Pell

Sorry but I don't see the src directory and HelloWorld.java file. Do you have it?ThanksHoward

DCX_Technical_(dcx_tech_-_(deleted))

Here it is with HelloWorld.javaThanks for letting me know.Rolf.

Mahesh_Pinnamaneni

Message from Pinnamaneni, Mahesh via eLinkHi,I have tried using your module but it cannot locate the helloworldclass.Where we need to place the helloworld classfile inorder to work.ThanksMahesh P-----Original Message-----From: eLink Discussion: Development Discussion[mailto:development@elinkkc.opentext.com] Sent: 07 September 2006 16:35To: eLink RecipientSubject: OopsOopsPosted by Technical, DCX on 09/07/2006 11:29 AMHere it is with HelloWorld.javaThanks for letting me know.Rolf.[To reply to this thread, use your normal E-mail reply function.]============================================================Attachment link: joexample_1_0_0.ziphttps://knowledge.opentext.com/knowledge/llisapi.dll/open/7801573============================================================Topic: Calling Java from OScripthttps://knowledge.opentext.com/knowledge/llisapi.dll/open/7702825Discussion: Development Discussionhttps://knowledge.opentext.com/knowledge/llisapi.dll/open/786303Livelink Server:https://knowledge.opentext.com/knowledge/llisapi.dllTo Unsubscribe from this Discussion, send an e-mail tounsubscribe.development@elinkkc.opentext.com.

Hugh_Ferguson

After reading this thread I did some experimenting myself. I've verified that Livelink finds my classes if I put the .class files in their appropriate file hierarchy under javaserver/lib. Really we ought to be able to drop a jar file there. Perhaps there's an undocumented place that we can write our new jar file name to so that it gets in LL's JVM classpath.On the topic of primitives vs objects, I've successfully fetched a string from my class. Attempts to retrieve a java date field have failed. Really though for this to be truly useful, we need to be able to map a few more types other than String and int. When I invoke a method that returns java.util.Date, my return object is of type JavaObject. I'm curious if there is a way to cast it to the appropriate Oscript type, a kind of LLValue for oscript.-hugh

Jonny_Coombes

Message from Jonny Coombes via eLinkMessage from <> via eLink

eLink

I guess you could use LLValue.valueToString in order to serialise amore complex parameter to a string, pass this through to the Java class, andthen de-serialise it using the built in LLValue cracking code which is presentin lapi.jar. Going back the other way, just use the same process in reverse.

I can’t see why this shouldn’t work…

Cheers

JonnyCoombes Bsc (Hons)
Principal Solutions Architect
Open Text Corporation

Mobile: +44 (0) 7748 986 937

Phone:+44 (0) 1494 679700

YIM: ot_jcoombes

The market leader in providing
Enterprise Content Management solutions.
www.opentext.com

This e-mail is protected by domestic and international copyright laws andtreaties and is the property of Open Text Corporation, it may containconfidential and/or trade secret information of the Open Text Corporationand/or its subsidiaries (OTC), and may be subject to legal privilege in favorof OTC. This e-mail may only be lawfully received, accessed, displayed on acomputer screen, printed, copied, and/or used by the specific addressee(s)named above (“Authorized Recipient”) for the purpose for which it was sent byOTC. All other rights and licenses to this e-mail are fully reserved to OTC. Ifyou are not an Authorized Recipient, you are required to immediately delete thise-mail in its entirety without printing, copying, using, and/or re-transmittingthis e-mail, either in whole or in part. The transmission of this e-mail by OTCis not to be construed as a waiver by OTC and/or the individual sending thise-mail on behalf of OTC of any of their respective rights or privileges at lawor otherwise, howsoever arising.

From: eLinkDiscussion: Development Discussion [mailto:development@elinkkc.opentext.com]
Sent: 21 September 2006 01:50
To: eLink Recipient
Subject: Experimenting with Java in LL 96

Experimenting with Java in LL 96		Posted by hferguso (Ferguson, Hugh) on 09/20/2006 08:45 PM
In reply to: Calling Java from OScript		Posted by hstoop (Stoop, Hans) on 08/30/2006 04:20 PM

After reading this thread I did some experimenting myself. I've verified that Livelink finds my classes if I put the .class files in their appropriate file hierarchy under javaserver/lib. Really we ought to be able to drop a jar file there. Perhaps there's an undocumented place that we can write our new jar file name to so that it gets in LL's JVM classpath.

On the topic of primitives vs objects, I've successfully fetched a string from my class. Attempts to retrieve a java date field have failed. Really though for this to be truly useful, we need to be able to map a few more types other than String and int. When I invoke a method that returns java.util.Date, my return object is of type JavaObject. I'm curious if there is a way to cast it to the appropriate Oscript type, a kind of LLValue for oscript.
-hugh

[To reply to this thread, use your normal E-mail reply function.]
Topic:	Calling Java from OScript
Discussion:	Development Discussion
Livelink Server:	Knowledge Center

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Message from Carsten Kulms via eLinkSure, you can use Oscript/LAPI's stringifying serialization, but thereare some reasons why you should not:First, it is not documented. Second, it is not guaranteed that the LAPI de-/serialization staysequivalent to Oscript's Str.ValueToString / Str.StringToValue in futureversions. Both may change without notice.These two points already show: You must not use the LAPIde-/serialization.However, one more reason, imho not the least important: One usually doesnot want to code something likein Oscript:javaObject.InvokeMethod( "func", {Str.ValueToString(anOScriptType)} )in Java: func(String sarg) { LLValue argValue = undocumented_LAPI_feature.deserialize(sarg); JavaType_anOScriptType arg = (anOScriptType)convertLLValueToJavaType(argValue); //... }Then it would be easier to stay with Oscript and/or implement a LAPIclient.Also this won't help you with calling Java methods with more genericparameter types, e.g. the widely used Collection types, because thereare no corresponding types in Oscript. This can only be achieved byproper conversions performed by the JavaObject implementation. (Ofcourse it has to be well documented what is supported and what is not.)I'm quite sure the Oscript - Java integration can be improved to supportall Oscript types and more standard Java types in a coming version.For now I recommend to use some easy to understand and proven way for(yet) not supported data types. E.g. for Date you can use a standardtextual representation (e.g. ISO 8601) - this can be easily convertedwith both Oscript and Java. Or simply use the integer representations ofthe date and time parts of an OScript Date object and pass them as intto Java.