What I'm doing with my project, I use VO to get/set attributes in the CMP
ejb. I manage to receive an already created VO from the client as parameter
in the ejbCreate method. If instead I want to retrieve data, fill in a VO
and pass it back to the client, than I create a new instance of the VO in
the entity and use it as a return value in a public method defined as
@ejb.interface-method.
Here follows a public method of a CMP entity bean which returns an Address
VO:
/**
* @ejb.interface-method
* @return
*/
public AddressValue getAddress()
{
AddressLocal addrLocal = this.getHomeAddress();
if (addrLocal == null) return null;
Long addressId = addrLocal.getAddressId();
String address1 = addrLocal.getAddress1();
String address2 = addrLocal.getAddress2();
String address3 = addrLocal.getAddress3();
String zip = addrLocal.getZip();
String city = addrLocal.getCity();
String country = addrLocal.getCountry();
Date date = addrLocal.getCreationDate();
AddressValue addrValue = new AddressValue(addressId,
address1,
address2,
address3,
zip,
city,
country,
date);
return addrValue;
}
getHomeAddress is an abstract getter method which returns an instance of the
Address entity bean related with this one in a 1-to-1 relationship. The
concept here anyway is that you can have a public method which create a new
instance of the VO and returns it to the client (a session bean or an
external client).
Hope it will help,
Marco
----- Original Message -----
From: "Takashi Okamoto" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, August 10, 2003 10:29 AM
Subject: [JBoss-user] How can I use VO in CMP?
> Hi jboss,
>
> I found following articles to use Value Object with CMP:
>
> http://xdoclet.sourceforge.net/valueobjects.html
>
> I feel it's greate and I immediately tried it with JBoss 3.2.1(+Tomcat
> 4.1.24) and JBossIDE 1.2.0. However I user getter/setter for Value
> Object(named AddressValue), I got following error message:
>
> ----------------------------------------------------
> 2003-08-10 06:51:07,746 ERROR [org.jboss.ejb.plugins.LogInterceptor]
EJBExcepti
> on:^M
> javax.ejb.EJBException: Method is not a known CMP field accessor, CMR
field acc
> essor, or ejbSelect method: methodName=getAddressValue^M
> at
org.jboss.ejb.plugins.cmp.bridge.EntityBridgeInvocationHandler.invok
> e(EntityBridgeInvocationHandler.java:111)^M
> at org.jboss.proxy.compiler.Runtime.invoke(Runtime.java:59)^M
> at
ossbook.eclipse.ejb.AddressBean$Proxy.getAddressValue(<generated>)^M
>
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)^M
> at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl
> .java:39)^M
> at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcce
> ssorImpl.java:25)^M
> at java.lang.reflect.Method.invoke(Method.java:324)^M
> at
org.jboss.ejb.EntityContainer$ContainerInterceptor.invoke(EntityCont
> ainer.java:1044)^M
> ----------------------------------------------------
>
> I guess method for VO doesn't related field and it cause error. How
> can I use VO setter/getter with JBoss? My code is like this:
>
> /**
> * @ejb.bean
> * description = "Address Entity Bean"
> * name = "Address"
> * type = "CMP"
> * cmp-version = "2.x"
> * view-type = "remote"
> * jndi-name = "ejb/address"
> * primkey-field = "userid"
> *
> * @ejb.transaction
> * type = "Required"
> *
> * @ejb.value-object
> * name = "Address"
> * match = "*"
> *
> * @ejb.persistence
> * table-name = "address"
> */
> public abstract class AddressBean implements EntityBean {
>
> /** @ejb.interface-method */
> public abstract void setAddressValue(AddressValue address);
>
> /** @ejb.interface-method */
> public abstract AddressValue getAddressValue();
>
> // following are general CMP setting......
> /** @ejb.interface-method
> * @ejb.pk-field
> */
> public abstract String getId();
>
> /** @ejb.interface-method */
> public abstract void setId();
>
> /**
> * @ejb.interface-method
> * @ejb.persistence
> * ...
> */
> public abstract String getParam();
>
> /** @ejb.interface-method */
> public abstract void setParam();
> ...
>
>
> regards,
>
> Takashi Okamoto
>
>
>
>
>
>
>
> -------------------------------------------------------
> This SF.Net email sponsored by: Free pre-built ASP.NET sites including
> Data Reports, E-commerce, Portals, and Forums are available now.
> Download today and enter to win an XBOX or Visual Studio .NET.
>
http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01
> _______________________________________________
> JBoss-user mailing list
> [EMAIL PROTECTED]
> https://lists.sourceforge.net/lists/listinfo/jboss-user
>
-------------------------------------------------------
This SF.Net email sponsored by: Free pre-built ASP.NET sites including
Data Reports, E-commerce, Portals, and Forums are available now.
Download today and enter to win an XBOX or Visual Studio .NET.
http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01
_______________________________________________
JBoss-user mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/jboss-user
