gunther hi,
please find the comments in jibx site regarding nullable attribute
The marshalling behavior when the attribute is "true" and the object
reference is null depends on whether the binding defines the corresponding
element as optional or required. If the element is optional it will simply
be left out of the marshalled document. If the element is required it will
be written with an *xsi:nil="true"* attribute. This attribute can only be
used with objects that are bound to an element name.
Regards,
venakt annangi
On 7/25/07, Günther Wieser <[EMAIL PROTECTED]> wrote:
hi,
i found some confusing information regarding the usage of xsi:nil to
indicate if an obejct or value is null.
on the mailing list i found the following entry:
[jibx-users] JiBX 1.1 beta4 release
Dennis Sosnoski
Thu, 25 May 2006 21:26:05 -0700
4. Added nillable attribute to object group and value element, supporting
the xsi:nil attribute at runtime (requires element name, not allowed on
abstract mapping)
in the docs i found out that the value element doesn't support
nillable=true. interestingly i can add that to my binding and it compiles
well. but when it comes to runtime, i get a weird exception:
java.lang.IndexOutOfBoundsException: only START_TAG can have attributes
END_TAG seen ...</street>\r\n\t\t<city xsi:nil="true" />... @10:26
at org.xmlpull.mxp1.MXParser.getAttributeValue(MXParser.java:927)
at
org.jibx.runtime.impl.XMLPullReaderFactory$XMLPullReader.getAttributeValue
(XMLPullReaderFactory.java:395)
at org.jibx.runtime.impl.UnmarshallingContext.getAttributeValue(
UnmarshallingContext.java:356)
at org.jibx.runtime.impl.UnmarshallingContext.attributeBoolean(
UnmarshallingContext.java:1881)
at
data.Address.JiBX_C__JavaDev322_JiXB_Test_src_customer_binding_unmarshal_1_1
(Address.java)
at
data.Customer.JiBX_C__JavaDev322_JiXB_Test_src_customer_binding_unmarshal_1_2
(Customer.java)
at
data.JiBX_C__JavaDev322_JiXB_Test_src_customer_bindingCustomer_access1.unmarshal
()
at org.jibx.runtime.impl.UnmarshallingContext.unmarshalElement(
UnmarshallingContext.java:2537)
at org.jibx.runtime.impl.UnmarshallingContext.unmarshalDocument(
UnmarshallingContext.java:2680)
at test.CustomerWAddressTest.main(CustomerWAddressTest.java:23)
i don't get this is i remove 'nillable=true' from the binding, but then of
course the value is not null, it's an empty string (which means something
different in our case).
here's the binding:
<?xml version="1.0" encoding="ISO-8859-2"?>
<binding>
<mapping name="customer" class="data.Customer" flexible="true"
ordered="false" allow-repeats="true">
<value name="id" set-method="setJiXBId" get-method="getJiXBId"/>
<value name="first" set-method="setJiXBFirstName"
get-method="getJiXBFirstName"/>
<value name="last" set-method="setJiXBLastName"
get-method="getJiXBLastName"/>
<!-- <collection field="addresses" flexible="true" ordered="false"> -->
<structure name="address" type="data.Address" allow-repeats="true"
flexible="true" ordered="false" set-method="addAddress"
get-method="getAddress">
<value name="id" set-method="setJiXBId" get-method="getJiXBId"/>
<value name="street" set-method="setJiXBStreet" get-method="getJiXBStreet"
usage="optional"/>
<value name="city" set-method="setJiXBCity" get-method="getJiXBCity"
usage="optional" nillable="true"/>
</structure>
<!-- </collection> -->
</mapping>
</binding>
and here's the example data:
<?xml version="1.0" encoding="ISO-8859-2"?>
<customer xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
<id>1234</id>
<first>Heinz</first>
<last>Prueller</last>
<asdasd>asasd</asdasd>
<address>
<id>111</id>
<street>Daham 1</street>
<city xsi:nil="true" />
</address>
</customer>
so do i need to change something in my binding? could i use structure
instead of value (and if how can i do that)?
br,
günther
--
Günther Wieser
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