Can any one help me on how to
create class for a group declaration using jaxb binding ?
I want to map a group in my xsd to a class which will be inherited by another class.I am stuck at how to map the group in xsd to a class using jaxb binding.
Any help will be appreciated.
Thanks
Related
I have a set of schemas that I generate JAXB classes from and I would like JAXB to add a new property to one of the classes for an element that doesn't exist in the schema. How can I do this?
Can anyone please tell how to generate the ObjectFactory class from some Java beans ? Remember , I dont have the xsd and hence I cannot use JAXB for the same.
The only class generation that JAXB (JSR-222) implementations do is from XML schema. When starting from Java classes you just need to create a class and annotate it #XmlRegistry. You will need to include this class in the array of classes used to bootstrap the JAXBContext. The main reason for doing this is to leverage the #XmlElementDecl annotation to associated multiple root elements with a class. Is this what you are trying to do?
I am new to using JAXB. I need to generate an xml file from its schema, where the schema and element values are input from the user.
My problem is, if I don't know the name of the elements beforehand, how can I use the JAXB generated classes? Is there a generic function, like getRoot() or getChildren() which I can use to traverse through the classes?
I use JAXB marshaller to store some java objects as XML files. Some of these objects reference each other, so I unsurprisingly obtain this error:
[com.sun.istack.internal.SAXException2: A cycle is detected in the object graph. This will cause infinitely deep XML
The solution which consists in removing the cycles and use only tree structure is not feasible - I need both navigability directions.
To solve this issue, I would rather use xlink to reference the xml objects instead of copying them in cascade. Is this solution pertinent? Is it possible to do that with JAXB marshaller? How?
You can implement an XLink approach in JAXB using an XmlAdapter. Below are links to various similar answers.
Serialize a JAXB object via its ID?
Using JAXB to cross reference XmlIDs from two XML files
Can JAXB marshal by containment at first then marshal by #XmlIDREF for subsequent references?
I lead the EclipseLink JAXB (MOXy) implementation, and we have the #XmlInverseReference extension for mapping bidirectional relationship that you may be interested in:
http://blog.bdoughan.com/2010/07/jpa-entities-to-xml-bidirectional.html
Dude, you can note in one of the entity the annotation #XmlTransient, so when unmarch, it will not complain about the cycle problem.
But with thius workaround after unmarch the xml you will have to populate the atribute with the #XmlTransient.
I was reading some paper and find this. You can set #XmlTransient and use the callback method to do something after the unmarch. So you can set the parent to you child.
public void afterUnmarshal(Unmarshaller u, Object parent) {
this.pessoa = (Pessoa) parent; }
I need to send/receive polymorphic objects from/to server while invoking my spring enabled restful service.
Please let me know if xmlseealso annotation can be useful even when there are more than 1 subclass in the class hierarchy. I'm askign this because, even though i pass 2 to 3 subclasses inside xmlseealso annotation, only the last subclass is considered when unmarshalling takes place.
like when the parent model is as below,
#XmlSeeAlso({RateFix.class, EarlyRedemption.class})
public class Instruction implements Serializable
jaxb2 always unmarshall the Instruction to EarlyRedemption model while it actually refers to RateFix.
I'm using jaxb 1.0 jars only where i can find the xmlseealso annotation
Please share me your view. Thanks.