How to force JavaScript code

alcorus · 2016-06-29T03:11:17+00:00

Hello, I recently upgraded my 2.2 reports to Birt 4.5. In one of them this JS function is called: <pre class="_prettyXprint"> String.fromCharCode(charCode)</pre> Since the upgrade, it's not working anymore. Here's the error: (translated from…

alcorus

Hello,
 
I recently upgraded my 2.2 reports to Birt 4.5.
In one of them this JS function is called:
<pre class="_prettyXprint">
String.fromCharCode(charCode)</pre>
Since the upgrade, it's not working anymore.
Here's the error: (translated from french)
 
<div>ReportDesign (id = 1):</div>
<div>+ There are errors evaluating script "String.fromCharCode(charCode)":</div>
<div>Java class "java.lang.String" doesn't have any field nor any public instance method called "fromCharCode"</div>
<div> </div>
<div>Is there a way to force the use of JavaScript instead of Java? or an alternate code to do it?</div>
<div> </div>
<div>Many thanks,</div>
<div>David</div>

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Comments

Clement Wong

Where is it not working for you?
 
Are you able to send a sample design that replicates the issue?
 
As a test, I was to use String.fromCharCode(65, 66, 67) in the beforeFactory event, and in a HTML Text item. The attached report design was tested in both iHub 3.1.1 and Open Source BIRT 4.5.0

alcorus

Hello Clement, 
first thank you for your quick reply. 
Actually I forgot to say i'm using a javascript include file. 
here you can find a test report along with my js file (please rename by removing the .txt) 
Best regards, 
David

alcorus

It seems that when you put the java.lang import somewhere in the report or inside a js file,
the java String class takes priority over the javascript one.
So how to force access to the javascript one?

Clement Wong

In the first line of the reporting.js file:
 importPackage(Packages.java.lang);
 
that imported the package which includes java.lang.String.
 
So here are two alternatives and I'm sure there are more...
 
 
1. Use a different method to construct the single character
<pre class="_prettyXprint">
function fromCharCode(charCode) {
return (new Character(charCode).toString());
}
</pre>
2. Declare a variable to save the Rhino JavasScript String before the importPackage, and use that saved variable in fromCharCode
<pre class="_prettyXprint _lang-">
var JavaScriptString = String;
importPackage(Packages.java.lang);

...

function fromCharCode(charCode) {
return JavaScriptString.fromCharCode(charCode);
}
</pre>

alcorus

The javascript variable is indeed a great way to allow using both js and java after the import.
Thank you for you great answer Clement :-)