Re: Map-backed forms in Struts2

[James Navin]

Ok. I read the OGNL spec and it looks like the way of using maps etc. is
subtley different from Struts1. My JSP now looks like

s:textfield name=attribute[#currentField.fieldname]/

and the associated Action class has methods

public void setAttribute(String key, Object value)
public Object getAttribute(String key)

The setAttribute method is still not being called (again, I have checked
with debug print statements), but this time in the catalina log I get the
following excepion messages along with a large stack trace

--snip--
Apr 18, 2007 9:57:01 AM
com.opensymphony.xwork2.util.InstantiatingNullHandler nullPropertyValue
SEVERE: Could not create and/or set value back on to object
ognl.NoSuchPropertyException:
com.csc.event.delivery.controller.EventOverviewController.attribute
[java.lang.IllegalAccessException: Class ognl.OgnlRuntime can not access a
member of class com.csc.event.delivery.controller.EventOverviewController
with modifiers private]
--snip--

It looks like it wants the actual attribute member to be public, but I
really dont want to do that...

Any help is much appreciated,

James

Lance [EMAIL PROTECTED] wrote on 17/04/2007 06:54:37 PM:

 Do you have a getValue(String key) method?
 I am not a s2 user but I have read the OGNL spec so sorry if I'm wrong
 but OGNL needs
public PropertyType getPropertyName(IndexType index)
and public void setPropertyName(IndexType index, PropertyType value)

 http://www.ognl.org/2.6.9/Documentation/html/LanguageGuide/indexing.
 html#N10189

 James Navin wrote:
  Hi all,
 
  A system I am developing requires forms to be generated dynamically at
  runtime based on data stored in a database. I have read that it is
possible
  to use map-backed forms in Struts1 to achieve this using something of
the
  form 's:textfield name=value(#currentField.fieldName)/' where the
  associated Action class has a method of the form 'public void
  setValue(String key, Object value)', resulting in name-value pairs
being
  submitted to the Action class.
 
  Is this possible to achieve in Struts2? I have not been able to make it
  work. When I use the above expression for the name attribute the
setValue
  method is never called (I have checked this with a few debug print
  statements), but no exception is thrown either. It just appears that
  nothing happens.
 
  Is this something I am doing wrong, or is there some other way to do
this
  in Struts2, or is it a bug?
 
  I am using Struts 2.0.6 with Java 1.5.3, Tomcat 5.5 and Internet
Explorer
  6.
 
  Thanks a lot in advance,
 
  James
 
 
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Map-backed forms in Struts2

[James Navin]

Hi all,

A system I am developing requires forms to be generated dynamically at
runtime based on data stored in a database. I have read that it is possible
to use map-backed forms in Struts1 to achieve this using something of the
form 's:textfield name=value(#currentField.fieldName)/' where the
associated Action class has a method of the form 'public void
setValue(String key, Object value)', resulting in name-value pairs being
submitted to the Action class.

Is this possible to achieve in Struts2? I have not been able to make it
work. When I use the above expression for the name attribute the setValue
method is never called (I have checked this with a few debug print
statements), but no exception is thrown either. It just appears that
nothing happens.

Is this something I am doing wrong, or is there some other way to do this
in Struts2, or is it a bug?

I am using Struts 2.0.6 with Java 1.5.3, Tomcat 5.5 and Internet Explorer
6.

Thanks a lot in advance,

James


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