RE: [Xdoclet-user] Data Object vs Value Object

[Hicks, James]

Title: Message

Ive heard the concept called all 3: Value Object, Data Object, and Data Transfer Object.  I believe Value Object best describes the concept.  Value Object is used for moving data between remote clients and the server.  It takes a copy of the values on the server and sends them to the client.  You get just the values, not a reference.

 

If you are working with CMP 2.0, valueobject subtask in XDoclet will not work.  I am currently working on a patch for this, which hopefully, if everything goes right, will be finished this coming weekend. 

 

James Hicks
C.A.D.G. - Application Developer
BERRYDirect
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-----Original Message-----
From: JD Brennan [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, April 10, 2002 2:02 PM
To: [EMAIL PROTECTED]
Subject: RE: [Xdoclet-user] Data Object vs Value Object

Thanks.  That makes sense.  Martin Fowler uses the name

Data Transfer Object for the Sun pattern Value Object.

 

Has the Java community settled on the name Value Object,

or might the name Data Transfer Object be more appropriate

for XDoclet?

 

I don't really care one way or the other, I'm just trying

to stick my finger in the air to see which way the wind

is blowing.  ;-)

 

Tx!

JD

 

-----Original Message-----
From: Vincent Harcq [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, April 09, 2002 10:07 PM
To: 'JD Brennan'; [EMAIL PROTECTED]
Subject: RE: [Xdoclet-user] Data Object vs Value Object

DO is the same concept as VO.

VO will replace DO in the future.  More powerful.

 

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of JD Brennan
Sent: mercredi 10 avril 2002 2:39
To: '[EMAIL PROTECTED]'
Subject: [Xdoclet-user] Data Object vs Value Object

What's difference between data object and value object
in XDoclet?

I've found documentation for the Value Object pattern
(http://java.sun.com/blueprints/patterns/j2ee_patterns/value_object/index.html)

and for the Data Access Object pattern
(http://java.sun.com/blueprints/patterns/j2ee_patterns/data_access_object/)

But I can't find a definition of the "Data Object" pattern.
It seems that in XDoclet the <dao> subtask is different
from the <dataobject> subtask, so am I correct in assuming
the dao and dataobject don't have anything to do with each
other in XDoclet?

Thanks for any enlightenment!
JD

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