Subj : Re: org.mozilla.javascript.EvaluatorException: Can't convert to type
To   : netscape.public.mozilla.jseng
From : mesuti@aciworldwide.com
Date : Thu Feb 26 2004 10:00 am





Thank you very much for the tip Igor.

The problem is solved in Rhino 1.5R5 Release Candidate 1. But I've got
onother problem when I use the result object of the concat() method in the
Java Script.

JavaScript sample I used:

//-----------------------------------------------------
var tmpA = new ByteString("Ishak ", ASCII);
var tmpB = new ByteString("Mesut", ASCII);
var tmpC = tmpA.concat(tmpB);
var tmpD = tmpC.concat(tmpA);

//data.de_int = tmpC.length;
data.output = tmpD;
//data.output = tmpC.toString(ASCII);

//End of Java Script
//-----------------------------------------------------

Rhino throws the following Exception:

Evaluating JavScript D:\Data\Archive\Rhino-15R41\experiments\sample.js...
concat result: Ishak Mesut
TypeError: undefined is not a function.
(D:\Data\Archive\Rhino-15R41\experiments\sample.js; line 4)
        at
org.mozilla.javascript.ScriptRuntime.constructError(ScriptRuntime.java:2257)
        at
org.mozilla.javascript.ScriptRuntime.constructError(ScriptRuntime.java:2247)
        at
org.mozilla.javascript.ScriptRuntime.typeError1(ScriptRuntime.java:2270)
        at
org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:1437)
        at
org.mozilla.javascript.gen.c1._c0(D:\Data\Archive\Rhino-15R41\experiments\sample.js:4)
        at
org.mozilla.javascript.gen.c1.call(D:\Data\Archive\Rhino-15R41\experiments\sample.js)
        at
org.mozilla.javascript.gen.c1.exec(D:\Data\Archive\Rhino-15R41\experiments\sample.js)
        at org.mozilla.javascript.Context.evaluateReader(Context.java:979)


The exception above is thrown by Rhino 1.5R5 Release Candidate 1.


Thanks in advance,
Ishak Mesut






                                                                           
             Igor Bukanov                                                  
             <igor@fastmail.fm                                             
             >                                                          To 
                                       mesuti@aciworldwide.com             
             02/25/2004 PM                                              cc 
             04:54                                                         
                                                                   Subject 
                                       Re:                                 
                                       org.mozilla.javascript.EvaluatorExc 
                                       eption: Can't convert to type       
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           





This should be fixed in the forthcoming Rhino 1.5 Release 5, you may try
release candidate 1 to see if it works for you indeed,
http://www.mozilla.org/rhino/download.html .

As a workaround for the previous releases you will need to change the
argument type in jsFunction_concat to Scriptable and do manual casting.

Regards, Igor

mesuti@aciworldwide.com wrote:
>
>
>
> Hi,
>
> I want to use Rhino interpreter in a Smart Card Management system as ECMA
> script interpreter. Rhino throws an exception when I call concat() method
> of a Host Object that I implemented (ByteString). A part of the source
code
> can be seen below:
>
>
>
> public class ByteString extends ScriptableObject {
>
>     /** Creates a new instance of ByteString */
>     public ByteString() {
>     }
>
>     public void jsConstructor(String s, Integer enc) {
>        ...
>     }
>
>     public int jsGet_length() {
>        ...
>     }
>
>     public ByteString jsFunction_concat(ByteString bs) throws IOException
{
>         ByteString bs1 = new ByteString();
>         ...
>
>         return bs1;
>     }
>
>     public String getClassName() {
>         return "ByteString";
>     }
> }
>
>
> Sample JavaScript  calling the concat method is also given below:
>
> var tmpA  = new ByteString("Text1 ", ASCII);
> var tmpB  = new ByteString("Text2", ASCII);
> var tmpC  = tmpA.concat(tmpB); // this is the problem line
>
>
> When Rhino evaluates the script it throws the following exception:
>
> Evaluating JavScript D:\Data\Archive\Rhino-15R41\experiments\sample.js...
> org.mozilla.javascript.EvaluatorException: Can't convert to type
> "com.bla1.bla2.bla3.hostobjects.ByteString".
> (D:\Data\Archive\Rhino-15R41\experiments\sample.js; line 3)
>         at
>
org.mozilla.javascript.DefaultErrorReporter.runtimeError(DefaultErrorReporter.java:76)

>         at
> org.mozilla.javascript.Context.reportRuntimeError(Context.java:591)
>         at
> org.mozilla.javascript.Context.reportRuntimeError(Context.java:630)
>         at
> org.mozilla.javascript.Context.reportRuntimeError1(Context.java:606)
>         at
> org.mozilla.javascript.FunctionObject.convertArg(FunctionObject.java:359)
>         at
> org.mozilla.javascript.FunctionObject.call(FunctionObject.java:408)
>         at
> org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:1191)
>         at
>
org.mozilla.javascript.gen.c1.call(D:\Data\Archive\Rhino-15R41\experiments\sample.js:3)

>         at
>
org.mozilla.javascript.gen.c1.exec(D:\Data\Archive\Rhino-15R41\experiments\sample.js)

>         at
org.mozilla.javascript.Context.evaluateReader(Context.java:820)
>         at
> com.aciworldwide.scm.gp.JSInterpreter.<init>(JSInterpreter.java:64)
>         at
> com.aciworldwide.scm.gp.JSInterpreter.main(JSInterpreter.java:117)
>
>
> It seems all methods with a "ByteString" argument causes the same
problem.
>
> Thanks
>
> Ishak
>

.