Re: [jibx-users] Unmarshall on an existing object

Wed, 14 May 2008 08:02:52 -0700

I found another thread which describes the issue in more detail (http://www.mail-archive.com/[email protected]/msg01249.html)

Anyway, I managed to get a list with the fields that were received but I have the names of the tags. What I will need for each tag name, is the name of its corresponding property from the mapping class.
Please let me know how can I do this.

Thanks,
Tudor

Thomas Jones-Low wrote: 
	Use a default. The Jibx <value> tag takes an default= attribute. This 
is only allowed on optional values (like you have) and if the optional 
value is missing, the corresponding set-method is called with the 
default. If you have the default attribute set to "missing" or some 
other out of bounds value, the Set-method now knows when to leave the 
value alone, and when to update it.

Tudor Olteanu wrote:
  
Since "null" is also a possible value for some fields, I can't assume 
that null values are corresponding to missing fields.

So what I need is a way to know if an optional field was/wasn't present 
in xml.

Thomas Jones-Low wrote:
    
	Using a existing object will require the use of the Factory attribute 
for the binding. This is a static method which returns the instance to 
be worked on.

	The original values to be kept will need a set-method rather than the 
default setter, to check for the null value and not update them.

  
      
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