Re: Bothersome BeanUtils.populate exception

[Mark Lowe]

Additionally i don't get the exception when i remove sizes and colours  
from the form, as i was getting mystical bean utils errors I started  
doing split half debugging like one does with javascript.

Everything's fine except for these properties. As I said before I've  
had this working in this way, there just must be something that i'm  
missed (although I'm fecked if i can see it).

My guess us that the exception happens when struts creates a dynabean  
from my action form, and/or attempts to populate the form based on the  
information it gets about the bean. But my types match as far as i can  
see.

The only thing i thought it could have been was stuff being stored as  
objects in the arraylist, I've had this working for weeks with  
arraylists.

I've updated beanutils in case that was the issue and googled for other  
folks with the same problem . to no avail.

On 13 Jan 2004, at 18:06, Mark Lowe wrote:

Hi Richard

Here are the summarized bits

public ArrayList getColours() {
        return colourList;
}
public void setColours(ArrayList colourList) {
        this.colourList = colourList;
}
//

ProductForm theForm = (ProductForm) form;

theForm.setColours(colourList);
...
<html:select property="colours" multiple="true">
        <html:options collection="colours" property="foo" />
</html:select>
Everything works (the select menus select the correct values etc, but  
then when i submit i get the bean utils illegal argument exception.

This worked pretty much in the same way before. Hopefully I'm just  
missing something simple.

here are my mappings also.

Cheers mark

		<action path="/admin/product/view"  
type="com.boxstuff.shop.admin.ViewProductAction"  
name="productEditForm" validate="false" scope="session"  
attribute="productEditForm">
			<forward name="success" redirect="false" path="admin.product.view"/>
		</action>
		<action path="/admin/product/save"  
type="com.boxstuff.shop.admin.SaveProductAction"  
name="productEditForm" validate="false" scope="session"  
input="admin.product.view" attribute="productEditForm">
			<forward name="success" path="admin.product.view" redirect="false"/>
		</action>



<ProductForm.java>
On 13 Jan 2004, at 17:31, Richard Hightower wrote:
I have an idea, but would like to see your html:form and ActionForm  
before I
ruin my reputation with a bad mojo answer.

Send them directly to me and copy this list.

Rick Hightower
Developer
Struts/J2EE training -- http://www.arc-mind.com/strutsCourse.htm

Struts/J2EE consulting --
http://www.arc-mind.com/consulting.htm#StrutsMentoring
-----Original Message-----
From: Mark Lowe [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 13, 2004 7:18 AM
To: Struts Users Mailing List
Subject: Bothersome BeanUtils.populate exception
beanUtils keeps getting its knickers in a twist when i submit a form
with 2 select menus with multiple values. I've had this working before
with the same version of struts and commons. Its not the action as the
exception is thrown before i get that far, when i remove the menus the
form submits fine.
I have form properties of type arrayList. I;d expect this exception if
i were to be using unsupported types but I've been setting the values
with  String and the form properties are also of type string.
I have trouble believing that bean utils has an issue with converting
Object to String when the values are copied.
The exception is a typical beanutils chocolate fire guard exception.  
If
i weren't using strings i'd understand but i am.

Any insights welcomed.

java.lang.IllegalArgumentException: argument type mismatch
         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native  
Method)
         at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.j 
av
a:39)
         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccess 
or
Impl.java:25)
         at java.lang.reflect.Method.invoke(Method.java:324)
         at
org.apache.commons.beanutils.PropertyUtils.setSimpleProperty(PropertyU 
ti
ls.java:1789)
         at
org.apache.commons.beanutils.PropertyUtils.setNestedProperty(PropertyU 
ti
ls.java:1684)
         at
org.apache.commons.beanutils.PropertyUtils.setProperty(PropertyUtils.j 
av
a:1713)
         at
org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java: 
1019)
         at
org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:808)

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