Subj : Re: E4X: @class causes exception
To   : McKinley, Richard
From : Igor Bukanov
Date : Mon Aug 23 2004 08:57 pm

McKinley, Richard wrote:
> Trying to use an attribute with the name of "class" (very common in HTML 
> with CSS) causes and exception:

See
http://www.mozilla.org/rhino/apidocs/org/mozilla/javascript/Context.html#FEATURE_RESERVED_KEYWORD_AS_IDENTIFIER

To use it do something like the following:

class MyContext extends Context
{
	public boolean hasFeature(int featureIndex)
	{
		if (festureIndex
		    == FEATURE_RESERVED_KEYWORD_AS_IDENTIFIER)
		{
			return true;
		}
		return super.hasFeature();
	}
}

Then you need either explicitly construct MyContext and pass it to 
Context.enter() or use custom ContextFactory:

class MyFactory extends ContextFactory
{
	public Context makeContext()
	{
		return new MyContext();
	}
}

and call once per application:

ContextFactory.initGlobal(new MyFactory());

Then Context.enter() will use MyContext.

> 
> org.apache.bsf.BSFException: JavaScript Error: missing name after .@ 
> (/report3.jsp#208)
>     org.apache.bsf.engines.javascript.JavaScriptEngine.handleError(Unknown 
> Source)
>     org.apache.bsf.engines.javascript.JavaScriptEngine.eval(Unknown Source)
>     org.apache.bsf.util.BSFEngineImpl.exec(Unknown Source)
>     org.apache.taglibs.bsf.scriptlet$1.run(scriptlet.java:101)
>     java.security.AccessController.doPrivileged(Native Method)
>     org.apache.taglibs.bsf.scriptlet.doEndTag(scriptlet.java:95)
> 
> I realize that class is a reserved word but this is going to be very 
> common and rather than have it become a FAQ that confuses everyone it 
> might be better to allow for it.
> 
> Regardless, here is the work-around:
>     //client.@class = "Organization"; //this causes and exception.
>     client.@tempclass = "Organization";
>     client.@tempclass.setLocalName("class");
> 
> Cheers,
> 
> McKinley

.