[jibx-users] marshalling a collection of String in an element with a constant attribute

[Gagnon, Jean-Philippe (LTI)]

Hi,



I'm trying to marshall a collection of String in an element with a
constant attribute as in this example



Java:

private List<String> myItems = new ArrayList<String>();



XML:



<Item version="V2">item1</Item>

<Item version="V2">item2</Item>

<Item version="V2">item3</Item>



I was expecting this binding to work :



<collection field="myItems" create-type="java.util.ArrayList">

<structure name="Item" >


<value style="attribute" name="version" constant="V2"/>

<value style="text" type="java.lang.String"/>

</structure>

</collection>



But I get this exception from the binding compiler:

Error: <value> elements within a collection must define element name for
unmarshalling; on value element at (line 72, col 54, in
./binding/scenarioBinding.xml)

[bind] Error: Type must be specified on outermost <structure>
element within collection; on structure element at (line 70, col 32, in
./binding/scenarioBinding.xml)



I have also tried to add the type="java.lang.String" to the structure
element but it gives me this exception



[bind] *** Error during code generation for file
'./binding/scenarioBinding.xml' - please enter a bug report for this
error in Jira if the problem is not listed as fixed on the online status
page ***

[bind] java.lang.IllegalStateException: Internal error: Expected
org.jibx.runtime.impl.MarshallingContext on stack, found
java.lang.String

[bind] full stack:

[bind] 0: org.jibx.runtime.impl.MarshallingContext

[bind] 1: java.lang.String

[bind] 2: java.lang.String

[bind] 3: int

[bind] 4: java.lang.String

[bind] 5: java.lang.String

[bind] at
org.jibx.binding.classes.MethodBuilder.verifyCompatible(MethodBuilder.ja
va:420)



Am I missing something obvious?

Thank you



JP

[Dennis Sosnoski]

Hi Jean-Philippe,

Not obvious, but a quirk of the code generation used with JiBX. The
handling for collections is unfortunately messy, and in this case trying
to use style="text" just takes the code generation down a wrong path.

The only way I know to do what you want is by writing a custom
marshaller/unmarshaller which handles the format you want. You should
then be able to reference the marshaller and unmarshaller directly on
the child <structure> element within the <collection>

- Dennis

Dennis M. Sosnoski
SOA and Web Services in Java
Training and Consulting
http://www.sosnoski.com - http://www.sosnoski.co.nz
Seattle, WA [phone] - Wellington, NZ [phone]

Hi,
I’m trying to marshall a collection of String in an element with a
constant attribute as in this example
private List<String> myItems = new ArrayList<String>();
<Item version="V2">item1</Item>
<Item version="V2">item2</Item>
<Item version="V2">item3</Item>
<collection field="myItems" create-type="java.util.ArrayList">
<structure name="Item" >
<value style="attribute" name="version" constant="V2"/>
<value style="text" type="java.lang.String"/>
</structure>
</collection>
Error: <value> elements within a collection must define element name
for unmarshalling; on value element at (line 72, col 54, in
./binding/scenarioBinding.xml)
[bind] Error: Type must be specified on outermost <structure> element
within collection; on structure element at (line 70, col 32, in
./binding/scenarioBinding.xml)
I have also tried to add the type="java.lang.String" to the structure
element but it gives me this exception
[bind] *** Error during code generation for file
'./binding/scenarioBinding.xml' - please enter a bug report for this
error in Jira if the problem is not listed as fixed on the online
status page ***
[bind] java.lang.IllegalStateException: Internal error: Expected
org.jibx.runtime.impl.MarshallingContext on stack, found java.lang.String
[bind] 0: org.jibx.runtime.impl.MarshallingContext
[bind] 1: java.lang.String
[bind] 2: java.lang.String
[bind] 3: int
[bind] 4: java.lang.String
[bind] 5: java.lang.String
[bind] at
org.jibx.binding.classes.MethodBuilder.verifyCompatible(MethodBuilder.java:420)
Am I missing something obvious?
Thank you
JP
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