On Fri, 23 Jun 2000, Frank Krahmer wrote:
> Dear Sir,
>
> how can I access a public baseclass attribute in a Java class via Jacl,
> when an object of derived class is instanciated ?
>
> Java-class example :
> --------------------
> public class baseClass
> { public String dummyAttribute;
> }
> public class derivedClass extends baseClass
> { // anything
> }
>
> Jacl-access example :
> ---------------------
> set theDerivedObj [java::new derivedClass]
> java::field $theDerivedObj dummyAttribute "blabla" // RUNTIME ERROR
> // brings error tcl.lang.TclException: field "name" doesn't exist
>
> set theBaseObj [java::new baseClass]
> java::field $theBaseObj dummyAttribute "blabla" // OK
>
> When the object is of class baseClass, the attribute is accessible.
> When the object is of class derivedClass, the attribute is not accessible.
You have found a bug in Tcl/Java. One should be able to access
fields from inherited classes by default. I am going to check
your test case into the CVS and then start look into how to solve
the problem. If you are interested in writing up a patch to fix
this problem, it will get fixed a lot sooner :)
The source files of interest are:
src/tcljava/tcl/lang/JavaFieldCmd.java
src/tcljava/tcl/lang/JavaInvoke.java (getField and setField methods)
Mo DeJong
Red Hat Inc
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