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From Scott Lamb <>
Subject Re: Collections classes?
Date Sun, 03 Jul 2005 07:20:11 GMT
On 2 Jul 2005, at 21:28, James Black wrote:
>> How can I get Axis to use the Java Collections classes? I see in
>> 1.2.1's "What's in this release" section that it says "Automatic two-
>> way conversions between Java Collections and SOAP Arrays". I  
>> don't  see
>> any details, though. How do I use this?
>> Specifically, I'm playing with GoogleSearch.wsdl. The
>> GoogleSearchResult class AXIS has getResultElements() and
>> setResultElements() methods that deal with plain Java arrays -
>> ResultElement[]. I'd prefer collections objects like List or (for   
>> Java
>> 1.5) List<ResultElement>.
>> Is this what this snippet is describing? If not, what does it  
>> mean?  And
>> is there any way to do what I want?
>   What benefits would you get by sending the extra data that a
> collection would require?

I'm not proposing a change to the WSDL or to what is sent over the wire.

>   If you send it as an array, and then the client can decide which way
> to use the data, so if a hashmap would make sense for the client,  
> it can
> be stored that way, but, not all clients have collection apis. For
> example, if you use gsoap and a C client, you would need to use  
> arrays.

I'm asking if there's a way I can influence the Java representations  
of SOAP data - both Java types fed into axis and Java types returned  
from it.

Can I get a List<Foo> (an ArrayList<Foo>, perhaps) out of axis rather  
than a Foo[]? And a Map<Foo,Bar> rather than a KeyValueBean[] or  

Since you bring up other language implementations, how about SOAPpy:  
It can deal with Python dictionaries natively. Can Axis do that? If  
not, why is it possible for SOAPpy and not Axis?

>   It is trivial to insert the array into a collection, and is simpler
> and more interoperative to transfer arrays of items around than to try
> to pass collections.

It's not as trivial when you have an entire graph of these objects to  
deal with. It's certainly possible, but I don't understand why Axis  
can't just give me what I want rather than requiring me to construct  
an entirely new object graph and then discard then one that it gave me.

Scott Lamb <>

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