PropertyUtils.copyProperties question...

[Corneliu Rachieru <cr...@espial.com>]

I have a bean called adminMap(a java.util.HashMap) defined that contains the
keys "id", "username", "password". I also have a DynaActionForm named form
defined in the struts-config.xml as
 
	<form-bean	name="adminForm"
                 	dynamic="true"
       		type="org.apache.struts.action.DynaActionForm">
       	<form-property name="action" 		type="java.lang.String"/>
    		<form-property name="id"
type="java.lang.String"/>
    		<form-property name="username"
type="java.lang.String"/>
    		<form-property name="password"
type="java.lang.String"/>
    	</form-bean>

I've been trying to copy the contents of the my hashmap to the form using:

	PropertyUtils.copyProperties(form, adminMap);

but that doesn't work (or at least it doesn't work in that form).
However, if i copy the properties like this it works fine.

	((DynaActionForm) form).set("id", adminMap.get("id"));
	((DynaActionForm) form).set("username", (String)
adminMap.get("username"));
	((DynaActionForm) form).set("password", (String)
adminMap.get("password"));

I would really like to use PropertyUtils.copyProperties since that way i can
keep my application truly dynamic and i don't have to access any properties
in the actual code (except for struts-config but that's ok). Am I trying to
do something crazy here (it was my understanding that
PropertyUtils.copyProperties supports this, but i could be wrong) ? Also,
did anyone dynamically copy a hashmap to a DynaActionForm in any dynamic way
?

Thank you,
 Corneliu

Re: PropertyUtils.copyProperties question...

[Klaasjan Brand <br...@topicus.nl>]

Corneliu Rachieru wrote:
> I have a bean called adminMap(a java.util.HashMap) defined that contains the
> keys "id", "username", "password". I also have a DynaActionForm named form
> defined in the struts-config.xml as
>  
> 	<form-bean	name="adminForm"
>                  	dynamic="true"
>        		type="org.apache.struts.action.DynaActionForm">
>        	<form-property name="action" 		type="java.lang.String"/>
>     		<form-property name="id"
> type="java.lang.String"/>
>     		<form-property name="username"
> type="java.lang.String"/>
>     		<form-property name="password"
> type="java.lang.String"/>
>     	</form-bean>
> 
> I've been trying to copy the contents of the my hashmap to the form using:
> 
> 	PropertyUtils.copyProperties(form, adminMap);
> 
> but that doesn't work (or at least it doesn't work in that form).
> However, if i copy the properties like this it works fine.
> 
> 	((DynaActionForm) form).set("id", adminMap.get("id"));
> 	((DynaActionForm) form).set("username", (String)
> adminMap.get("username"));
> 	((DynaActionForm) form).set("password", (String)
> adminMap.get("password"));
> 
> I would really like to use PropertyUtils.copyProperties since that way i can
> keep my application truly dynamic and i don't have to access any properties
> in the actual code (except for struts-config but that's ok). Am I trying to
> do something crazy here (it was my understanding that
> PropertyUtils.copyProperties supports this, but i could be wrong) ? Also,
> did anyone dynamically copy a hashmap to a DynaActionForm in any dynamic way
> ?
> 

To copy from a map to a dynabean you need to use BeanUtils.populate. 
I've used it and it works. Looking through the source code for BeanUtils 
is a good idea because a lot of DynaBeans functionality is not 
implemented yet...

greets,
Klaasjan



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