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From "Trieu, Danny" <dtr...@tickets.com>
Subject RE: Posible bug with commons EL.....
Date Wed, 12 Oct 2005 16:13:49 GMT
James,

Thanks for your response. But I don't think I did make the case clear
enough. So, let me give it another try.

My beans are in package com.xxx.domain

com.xxx.domain

abstract class Foo { // Notice: this class has the default package access
//modifier.
	private String firstName ;
	private String lastName ;
...... Public Getters/Setters ....
}

Now child class in the same package com.xxx.domain

com.xxx.domain

public class Bar extends Foo { // Notice: this class has "public" access
modifier
	private String abc ;
...... Public Getter/Setter ....
}

Out side of com.xxx.domain package, I have no problem creating Bar and at
The same time accessing Foo's, Bar's parent, properties.

For Example:

Public class BarActionForm extends ActionForm {
	Private Bar bar ;
...... Public Getter/Setter .....
}

public class BarAction extends Action {
	public ActionForward execute( ...., ActionForm form, .... ) {
		Final BarActionForm barForm = (BarActionForm) form ;
		
		barForm.getBar().setFirstName( "myFirstName" ) ; // no
problem 
		// accessing Bar's parent properties.
		
		return mapping.findForward("success") ;
	}
}

You see, I have no problem access Foo's properties from a Bar instance
inside my BarActionForm instance.

However, the problem is inside my JSP, where I have the BarActionForm binded
To an action mapping of my html's form tag. Accessing Foo's properties with
EL will result with IllegalAccessException. You see, this is clearly a bug
in commons-el.

For example in my JSP:

......
<html:form action="/myActionMappingPath" > <!-- this mapping has "myForm",
BarActionForm, bind to it -->
....
  <html:text property="bar.firstName" /> <!-- this is where I had the
IllegalAccessException -->
....
</html:form>

I hope this would make it clear that this is a bug. I've search the commons
archive and nothing that I found related to this issue. 

Thanks for any help,

--danny

-----Original Message-----
From: James Carman [mailto:james@carmanconsulting.com] 
Sent: Tuesday, October 11, 2005 3:13 PM
To: 'Jakarta Commons Developers List'
Subject: RE: Posible bug with commons EL.....

Check the Java Language Specification:

http://java.sun.com/docs/books/jls/third_edition/html/names.html#6.6.1


-----Original Message-----
From: Trieu, Danny [mailto:dtrieu@tickets.com] 
Sent: Tuesday, October 11, 2005 4:52 PM
To: commons-dev@jakarta.apache.org
Subject: Posible bug with commons EL.....

Hi,

 

I am accessing a nested bean property via EL and getting a
java.lang.IllegalAccessException:

 

java.lang.IllegalAccessException: Class org.apache.commons.el.ArraySuffix
can not access a member of class com.xxx.patron.domain.BasePerson with
modifiers "public"

        at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:65)

        at java.lang.reflect.Method.invoke(Method.java:578)

        at org.apache.commons.el.ArraySuffix.evaluate(ArraySuffix.java:314)

        at
org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145)

        at
org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorIm
pl.java:263)

        at
org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorIm
pl.java:190)

        at
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImp
l.java:922)

        at
org.apache.jsp.html.portlet.patron.PatronDetails_jsp._jspx_meth_html_form_0(
org.apache.jsp.html.portlet.patron.PatronDetails_jsp:156)

        at
org.apache.jsp.html.portlet.patron.PatronDetails_jsp._jspService(org.apache.
jsp.html.portlet.patron.PatronDetails_jsp:102)

 

my bean has the default package access modifier, but its properties are
declared "public". I think this is bug with the commons.el package. 

Can someone verify if this is true? If it is a bug. Can someone tell when is
the next release that will have a fix for this bug?

 

Thanks for any help,

 

--danny

 

"The essence of knowledge is, having it, to apply it; not having it, to
confess your ignorance." -Confucius

 




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