Hi Tom,
Another option is for to you to use the JiBX data binding option with
Axis2. JiBX (http://www.jibx.org) lets you work with you existing data
classes, while also providing extensive control over how these classes
are converted to and from XML. The downside is that you have to create a
binding definition file that tells JiBX how to do these conversions.
There are tools to help in going from Java classes to a binding
definition and then to the corresponding XML schema, but these are
somewhat out of date - meaning they more or less work, but don't really
take full advantage of current JiBX features. There's another tool that
uses a schema to generate a set of Java classes and a corresponding
binding definition, but that's even more out of date. I'll be working on
improving these tools in June-July for a JiBX 1.2 release, which will
also include integrating the code generation tool with WSDL2Java.
Right now the WSDL2Java implementation of JiBX binding requires you to
have the Java classes and a binding definition already created, and just
links up the Axis2 code to your classes. I'm working on some
improvements to the WSDL2Java handling now (unwrapping the top level
structures to reduce the number of data classes), and once that's done
I'll post some examples. You can view the existing Axis2-JiBX
documentation at
http://ws.apache.org/axis2/1_0/jibx/jibx-codegen-integration.html
- Dennis
Dennis M. Sosnoski
SOA, Web Services, and XML
Training and Consulting
http://www.sosnoski.com - http://www.sosnoski.co.nz
Seattle, WA +1-425-296-6194 - Wellington, NZ +64-4-298-6117
[EMAIL PROTECTED] wrote:
Hi Rodrigo,
This sure helps. Like you say, there are multiple ways of dealing with
it, and it seems to be related to style, ease of implementation, and
consistency of data. Each method has some pros and cons. I'll give it
some more thought...
Thanks, also to Robert Lazarski for his response.
Tom
Rodrigo Ruiz <[EMAIL PROTECTED]> wrote on 05/30/2006 02:39:31 PM:
> Hi Tom,
>
> There are some options more or less "practical" to get what you want.
>
> One is to replace your domain class with the generated one. This will
> probably mean moving the "non-bean" functionality in your domain
> Customer to another class, maybe something like "CustomerHelper". Of
> course, this is not always possible, as you may have some internal
> fields in your domain class you want to keep there.
>
> Another option is to make your domain class to subclass the generated
> class, or include it as an internal field.
>
> Copying does not have to be so bad. If you have a fixed mapping between
> what you have in your domain classes and what you want to return as XML
> beans, you can implement the copying in a helper class. This will
reduce
> the probability of an error. If you use the same names for your bean
> attributes in both classes, commons-beanutils maybe of help, as it
> provides some methods to perform "conversions" between bean classes.
>
>
> My own experience tells me that using the same object for internal and
> XML binding purposes is not always a good idea. If your service
modifies
> the state of your domain objects, using them for serialization will
> probably result in incoherences in your returned data.
>
> Think about it. If you return your Customer, Axis 2 starts
deserializing
> it to build the response, and in another request somebody changes some
> fields in the same object, the response may contain inconsistent data.
> Take into account that, once you "release" your object to Axis, you
> loose control over the transactionality of any operation on that
instance.
>
> I am not saying this is the end of the world. This scenario might
not be
> possible in your services, or even if possible, it may have little
or no
> importance. But if you do need returned data to be consistent, copying
> field values into an XML bean may be the only way to get a valid
> snapshot of your data.
>
>
> Hope this helps,
> Rodrigo Ruiz
>
>
> [EMAIL PROTECTED] wrote:
> >
> > Hi,
> >
> > I'm struggling a bit with the following.
> >
> > Say, I have a web service that allows you to search for customers. It
> > accepts a customer name, and returns a set (any number) of customers.
> > The response xml may look like
> >
> > <customerSearchResponse>
> > <customer>
> > <number>123</number>
> > <name>John Doe</name>
> > </customer>
> > <customer>
> > <number>987</number>
> > <name>Jane Doe</name>
> > </customer>
> > </customerSearchResponse>
> >
> > Obviously, in my application I have a Customer class. Now if I
create a
> > wsdl for this web service, and generate the server side code for
it, one
> > of the classes that is generated is a customer class, that represents
> > the customer in the xml response. On the other hand, I have the
Customer
> > domain object, which is a different one. To generate the response, I
> > have to create 'xml response' customers, and basically copy the
> > information from the Customer class to it. The above example is very
> > simple, but you can imagine more complexe cases that would involve
a lot
> > of copying from domain objects to xml representation objects. This is
> > very tedious and error-prone work -- typically work that I would
like to
> > avoid.
> >
> > Is there an elegant way to solve this issue?
> >
> >
> > Thanks,
> > Tom
> >
> >
> >
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