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From "Richard Sitze" <rsi...@us.ibm.com>
Subject Re: Bean Class/Bean Class Helper Generation
Date Mon, 11 Mar 2002 22:32:34 GMT
+1 to stepping back and designing (ie. cease code-checking on current
direction)

It's critical that we isolate JAX-RPC implementation details (Meta-data)
from the classes exposed to the user.  We need a design that reflects this
in place ASAP, and we need to be writing to the design to minimize
unnecessary rework later.  I'm all for refactoring, but I'm even more for
starting off on the right foot for the users.

If we expose the meta-data to the users, we are going to regret it...


+1 on an interface.

+0 on this specific interface.  Those who are dealing with this section of
code need to agree on this.

<ras>


*******************************************
Richard A. Sitze            rsitze@us.ibm.com
CORBA Interoperability & WebServices
IBM WebSphere Development


                                                                                         
              
                      R J Scheuerle                                                      
              
                      Jr/Austin/IBM@IB         To:      axis-dev@xml.apache.org          
              
                      MUS                      cc:                                       
              
                                               Subject: Bean Class/Bean Class Helper Generation
        
                      03/11/2002 04:14                                                   
              
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There have been several recent changes to the Bean Class generation to
support more advanced
xml features...namely attributes.

I applaud the new functionality, but we need to step back and consider a
more flexible architectural direction.

I would like to see all of the meta data information removed from the java
bean class and placed in a
Helper class that extends a Helper interface.  Here is a first pass at the
Helper interface:

interface Helper {
  public org.apache.axis.description.TypeDesc getTypeDesc();

  public org.apache.axis.encoding.Serializer getSerializerAs(String
mechanismType);

  public org.apache.axis.encoding.Deserializer getDeserializerAs(String
mechanismType);
}

The generated bean class should contain ONLY the getters/setters describing
the bean (and perhaps
the equals() method...which needs some work).    This would adequately
decouple
the logical bean from the serialization/deserialization of the bean.

The BeanSerializerFactory/BeanDeserializerFactory could be tweaked to
always look for a corresponding
Helper class to find the meta data or find the custom
serializer/deserializer.  The generic serializer/deserializer
classes should use default behaviour if the helper class is not available.
(In fact I am in favor of having
separate meta data aware serializers/deserializers.)

Separating the bean and the bean helper would allow users to provide custom
Helper emitters to
add custom serializers etc.

Please comment.

Rich Scheuerle
XML & Web Services Development
512-838-5115  (IBM TL 678-5115)





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