JAXB generates incorrect xml content!!!

[Marcello Marangio]

Hi all
I am using JAXB 1.0.1 (the one included in jwsdp 1.2) to marshal-unmarshal
xml content from a quite complex xml schema.
The problem is that the XML information I managed to generate is not
compliant to the schema the jaxb classes were generated from!!!
How is this possible?
Is there a limit in the schema's complexity that jaxb can handle?
Thanks
Marcello

 

[Michael Borgwardt]

Hi all
I am using JAXB 1.0.1 (the one included in jwsdp 1.2) to marshal-unmarshal
xml content from a quite complex xml schema.
The problem is that the XML information I managed to generate is not
compliant to the schema the jaxb classes were generated from!!!
How is this possible?
Is there a limit in the schema's complexity that jaxb can handle?

May be a bug in JAXB, may be a restriction in JAXB (probably specific features,
rather than general complexity), may be an error in the schema itself.
We can't tell without seeing details.

 

[Marcello Marangio]

May be a bug in JAXB, may be a restriction in JAXB (probably specific features,
rather than general complexity), may be an error in the schema itself.
We can't tell without seeing details.

Right!
ok, details...
I tried to isolate the problem, and it looks like a parsing lack, due to the
particular type of language (LR2 ?) defined in my xml schema.

So, that's my schema:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:element name="Parent">
<xs:complexType>
<xs:choice>
<xs:sequence>
<xs:element name="Child1" type="xs:string"/>
<xs:element ref="Child2" minOccurs="0"
maxOccurs="unbounded"/>
</xs:sequence>
<xs:element ref="Child2" maxOccurs="unbounded"/>
</xs:choice>
</xs:complexType>
</xs:element>
<xs:element name="Child2" type="xs:string"/>
</xs:schema>

I try to create the XML output:
<Parent >
<Child1>String</Child1>
<Child2>String</Child2>
<Child2>String</Child2>
</Parent>

That's the code:
....
ObjectFactory of = new ObjectFactory();
Parent p = of.createParent();
p.setChild1("child1 name1");
Child2 c2 = of.createChild2("Child2 1");
p.getChild2().add(c2);
Child2 c2_2 = of.createChild2("Child2 2");
p.getChild2().add(c2_2);
JAXBContext jc = JAXBContext.newInstance("myPackage");
Marshaller m = jc.createMarshaller();
m.marshal(p, System.out);
....

The exception is:

DefaultValidationEventHandler: [ERROR]: myPackage.impl.Child2Impl
Location: obj: myPackage.impl.ParentImpl@7
com.sun.xml.bind.serializer.AbortSerializationException:
myPackage.impl.Child2Impl
.....
.....
--------------- linked to ------------------

javax.xml.bind.MarshalException
- with linked exception:
[com.sun.xml.bind.serializer.AbortSerializationException:
myPackage.impl.Child2Impl]

I think the problem is that the parser cannot distinguish if a Child2
instance belongs to the first or to the second branch of the Parent
hierarchy in the schema.

Hope it helps to understand the problem, so you can help me

Ciao
Marcello

 

[Michael Borgwardt]

I think the problem is that the parser cannot distinguish if a Child2
instance belongs to the first or to the second branch of the Parent
hierarchy in the schema.

Hope it helps to understand the problem, so you can help me

Sorry, I'm not that proficient with XML. If nobody can help you here,
try Sun's Java XML forum: http://forum.java.sun.com/forum.jsp?forum=34

 

[Simon]

Hi Marcello

If your having problems with JAXB, then try using Liquid technologies
XML Data binding wizard. The new version 3 beta now has excellent
support for XSD, and creates code for java, C++, VB6 & C#.

http://www.liquid-technologies.com/Scripts/DownloadBeta.asp

Cheers

Simon Sprott

May be a bug in JAXB, may be a restriction in JAXB (probably specific features,
rather than general complexity), may be an error in the schema itself.
We can't tell without seeing details.

Right!
ok, details...
I tried to isolate the problem, and it looks like a parsing lack, due to the
particular type of language (LR2 ?) defined in my xml schema.

So, that's my schema:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:element name="Parent">
<xs:complexType>
<xs:choice>
<xs:sequence>
<xs:element name="Child1" type="xs:string"/>
<xs:element ref="Child2" minOccurs="0"
maxOccurs="unbounded"/>
</xs:sequence>
<xs:element ref="Child2" maxOccurs="unbounded"/>
</xs:choice>
</xs:complexType>
</xs:element>
<xs:element name="Child2" type="xs:string"/>
</xs:schema>

I try to create the XML output:
<Parent >
<Child1>String</Child1>
<Child2>String</Child2>
<Child2>String</Child2>
</Parent>

That's the code:
...
ObjectFactory of = new ObjectFactory();
Parent p = of.createParent();
p.setChild1("child1 name1");
Child2 c2 = of.createChild2("Child2 1");
p.getChild2().add(c2);
Child2 c2_2 = of.createChild2("Child2 2");
p.getChild2().add(c2_2);
JAXBContext jc = JAXBContext.newInstance("myPackage");
Marshaller m = jc.createMarshaller();
m.marshal(p, System.out);
...

The exception is:

DefaultValidationEventHandler: [ERROR]: myPackage.impl.Child2Impl
Location: obj: myPackage.impl.ParentImpl@7
com.sun.xml.bind.serializer.AbortSerializationException:
myPackage.impl.Child2Impl
....
....
--------------- linked to ------------------

javax.xml.bind.MarshalException
- with linked exception:
[com.sun.xml.bind.serializer.AbortSerializationException:
myPackage.impl.Child2Impl]

I think the problem is that the parser cannot distinguish if a Child2
instance belongs to the first or to the second branch of the Parent
hierarchy in the schema.

Hope it helps to understand the problem, so you can help me

Ciao
Marcello