I have evaluated TOPLink and JavaBlend and consider TOPLink is
far superior on following accounts
- less intrusive
- flexibiity
- CMP (anyone use TOPLink CMP EntityBean in large production now?)
- all the goodies already mentioned in the list
TOPLink's lazy instantiation can be improved as ackownledged by Object People.
It is not serious anyway.
My favourate TOPLink capability is that it manages relationship
from a CMP EB to a dependent object, which has a relationship to another CMP
EB, all without a single line of "relationship" code. Does anyone know any
other tool can do this?
When applying the pattern of Session Bean facade over Entity Beans, if (stateless)
Session only receives EB's PK from client,
then you have to call EBHome.findBYPrimaryKey() in Session Bean, as expected.
cheers
chuck
>Rudi Vankeirsbilck wrote:
>
>I agree TOPLink does have some limitations, but they are relatively easy to
live with. And, as has been pointed out before, some of them will disappear
with JDK 1.2.
>
>We have evaluated a number of O-R mapping products and concluded that only
TOPLink had all the features we needed. Flexible mapping strategies to allow
mapping to a legacy database was one of them. We also found TOPLink was the
least intrusive of the tools we looked at.
>
>As for maturity: I understand TOPLink Java is based on a TOPLink Smalltalk
product that had already been used by the Object People for several years. The
Java version GA'd in spring 1998 if I remember well, we have been using it since
then. We _do_ think the product is mature enough.
>
>My favourite missing TOPLink feature: to be able to generate a TOPLink mapping
layer from an XMI file (which in turn can be generated from Rational Rose and
other modellers). I hope the Object People will jump on the XMI bandwagon soon...
>
>Regards, Luc Peerdeman.
>
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