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Re: [eclipselink-users] [MOXy] empty string
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Hi Blaise,
Wow, that was a fast reply! I think I will go with option #1 since I don't
know who else might be calling the setter.
Thanks!!
--Polly
Blaise Doughan wrote:
>
> Hi Polly,
>
> The relevant method is "setSetPerformedForAbsentNode(boolean)"
> http://www.eclipse.org/eclipselink/api/1.1/org/eclipse/persistence/oxm/mappings/nullpolicy/NullPolicy.html#setSetPerformedForAbsentNode(boolean)
>
> You will want to configure this parameter to be false. Then EclipseLink
> will not perform a set operation for missing tags. For the "" porting
> you have two options:
>
> 1. Use a converter with the mapping, if the field value is null then
> return "" as the attribute value.
> 2. Use method accessing on the mapping (configure the mapping to use
> the get/set methods instead of the attribute directly). Then put
> logic on the set method to convert null to "". Since EclipseLink
> won't perform a set for missing tags you'll know that the set to
> null calls correspond only to empty tags.
>
> -Blaise
>
> polly.c.chang wrote:
>> Hi,
>>
>> I have a situation where we need to distinguish between empty tags vs.
>> missing tags. The rules are:
>>
>> For all String types:
>> * If the XML has <description></description>, that is supposed to mean
>> empty
>> string ("").
>> * If the XML has no "description" tag, that is supposed to mean null.
>> * And vice versa for marshalling.
>>
>> I looked at the javadoc and found that I might need to set a NullPolicy:
>> http://www.eclipse.org/eclipselink/api/1.1/org/eclipse/persistence/oxm/mappings/nullpolicy/NullPolicy.html
>>
>> I am still confused after reading the documentation though. How do I
>> tell
>> EclipseLink that empty string means empty tags?
>>
>> Thanks!
>> --Polly
>>
>
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>
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