Java<->OScript Data Types

This is the thirth article on calling Java from OScript. If you want to refer the first two articles on how to call Java from Oscript, please take a look at the first article and the second article here.

The equivalent data types in java and oscript are:

a. Java to OScript

char, Character
short, Short
int, Integer
float, Float
double, Double
long, LongLong
Java -> Oscript

b. OScript to Java

Booleanboolean, Boolean
Integershort, Short
int, Integer
long, Long
JavaObjectPassed as wrapped value
Longlong, Long
Object or Framecom.opentext.livelink.oml.OScriptObject
Realfloat, Float
double, Double

Happy Java Programming in the Content Server!

The Connection Object in smartUI

Setup of the Connection Object

smartUI does have a couple of interesting objects, but the actual documentation about them is not very clear. So lets take a look on the objects.

First, we’ll examine the connection object a little bit more in detail. The page context will follow in another post.

The connection object provides information about the content server to connect with. Normally, this object comes from the content server but has to be constructed manually when you use the index.html testing facility.

Lets take a look at a typical index.html with the connection object setup

Setup of the connection object

Remember, the widget will get everything beeing perfectly setup from the content server, but using the test faciliy, you have to mock up this.


  • url – the url which is the content server url in your mockup data
  • supportPath – where is your content server support directory
  • credentials – in case you want to log in, use this clause
  • session- when you want to ignore the ticketing etc, use ticket:”dummy”

Lets see what this object is doing:

(here the page is running and this is a screenshot from the debugger)

A debugging session with the connection object

We see, there is a connector object beeing the parent for the connection object. The connection object contains all parameter setups from the index.html, mainly the url and the session infos.

There is also an Authenticator in this connector object, which contains another copy of this connection object but also with the information, how the automatic re-login for a valid session ticked should be done. And of course, the type of Authenticator (here InteractiveCredentialsAuthenticator)

(Remember: The security token timeout will cancel your session (within typically 300 sec) if you do not a relogin).

This is the mechanism to avoid permanent logins. Take a look at the available authenticators to see the possibilities.

You can always refer the Connection Object to get the url of the server. This url os merged with the parameters in the Model URL function to build the final REST call.

A useful object. Normally we get it automatically from the server, only while testing with Mock-Up Data we need to setup this object manually.

Calling OScript from Java Code (2)

In December 2016, we discussed how to call Java code from OScript . Now, we’ll discuss the other way round, how to call OScript from Java. This can be quite useful, if you want to use your business logic implemented in java against the content server.

The Java code must be put in the ojlib directory (see the previous post on this topic).

As always, if you want to deploy your java code within a module, do this

  • Build your code into jar files.
  • Add the jar files in OTHOME/ojlib/ or OTHOME/module/yourmodule_yourversions/ojlib/ directory (and their subdirectories) to be recognized by Content Serverk JVM’s application classloader.

The base thing is, you call OScript built-in functions through the OScriptObject.runScript method from a java coding.

For example, the java code


will display the unique integer for the current thread ID at the console (or in the logs, if you do not use CSIDE)

You can call all OScript functions and scripts. This example will list all nodes in the enterprise workspace

     // List nodes in the Enterprise workspace.
            result = (Map<String,Object>) OScriptObject.runScript( "$LLIAPI.NodeUtil.ListNodes",
				args );

prgCtx is the standard rogram Context, args is the ArrayList containing the arguments and A1 points to the first entry in the args array to be used as ParentID.

The next example can be used to get the current user from java coding, extract its userID and then derives the user name from ths user id. A standard logger is used to log the output, replace this with the logger of your preference.

    public static String getUserName( OScriptObject prgCtx )
    throws Exception
        String retval = " user not found";
            // get the user session object
            OScriptObject uSession = (OScriptObject) prgCtx.invokeScript( "USession" );
            // get the userID from the User Session
            Integer userID = (Integer) uSession.getFeature( "fUserId" );
            // display it
            logger.log( Level.INFO, "UserID is " + userID );
            retval = "The current login User: " + userID;
            // Get the Users name from the User ID
            Map<String,Object> status = (Map<String,Object>)
			OScriptObject.runScript( "$LLIAPI.UsersPkg.NameGetByID", uSession, 1000 );
            logger.log( Level.INFO, String.valueOf( status ) );
            logger.log( Level.INFO, (String) status.get( "Name" ) );
        catch( Exception e )
            logger.log( Level.SEVERE, "Caught Exception", e );
            throw e;
        return retval;


In the next posting on this topic, we’ll discuss the Mappings from JAVA to OScript and vice versa.


Calling Java Code from OScript (1)

Sometimes it would be nice to use existing Java coding from a module instead of recoding this in OScript.

There is a facility in the content server which does exactly this bridging from OScript to Java, the so called JavaObject class. You’ll find the exact documentation in the “OScript API/Build-In Package Index”

In this first post of the series we’ll discuss the  basic calls from OScript.

First, you need some Java Code, compiled and in the form of a jar. Put this jar either in OTHOME/ojlib or (much better) in a ojlib directory in your module structure. After installing the module, the jar(s) are copied automatically to the OTHOME/ojlib. Then, the jvm classloader will find your jar(s).

From OScript it is possible to access static classes and instances.

Dynamic InvokeStaticMethod(String classname, String methodName, List parameters)

Dynamic GetStaticField( String classname, String fieldName)

Dynamic SetStaticField( String className, String  fieldName, Dynamic value)

The return values are either Error or Dynamic if the call is successful.

JavaObject New (String className, List parameters)
Dynamic GetField(String fieldname)

Dynamic SetField(String fieldname, Dynamic value)

Dynamic InvokeMethod(String methodName, List parameter)

The return values are either Error or Dynamic if the call is successful.

An example
function void javaTest()

   JavaObject myObject

   myObject ="my.own.package.class")
   Dynamic res = myObject.InvokeMethod("myMethod",{"aa","bb})

   if (isError(res))

     echo ("Init failed")



   Dynamic res1 = myObject.GetField("myResult")

   if (IsError(res)) 

     echo("Calculation failed")



   echo("The result is "+res1)


In the next post we’ll discuss how to get the JNI exceptions and the error stack from the jvm.