Dmitri Colebatch wrote:
>Done: http://wiki.java.net/bin/view/Javawsxml/JaxbExistingClassExistingSchemaHowTo
>
>I've only done the basic formatting - I'll fix that in time.
>
>I've just hit a situation where I have
>
>class Deal
>{
> private Customer customer;
>}
>
>and I want to map it to:
>
><Deal>
> <Customer>
> <IndivualCustomer> ...
>
I didn't see the Java representation corresponding to IndividualCustomer.
So I can't tell. Can you post that ?
Thanks
Sekhar
>
>is this possible? am I going to need to remodel my classes.
>Obviously Customer has multiple implementations (as well as individual
>we have co-buyer and company). Any suggestions?
>
>cheers
>dim
>
>On 6/21/05, Kohsuke Kawaguchi <Kohsuke.Kawaguchi_at_sun.com> wrote:
>
>
>>Comments about the steps later, but I think this would make a great Wiki
>>page. Would you be interested in adding this to Wiki and link it from
>>http://wiki.java.net/bin/view/Javawsxml/JaxbSI ?
>>
>>
>>Dmitri Colebatch wrote:
>>
>>
>>>Hi all,
>>>
>>>I figured I'd start by making a few notes on how what I'm learning so
>>>that (a) others can correct me where I'm missing something, and (b)
>>>someone else can benefit from it. What follows here is a very basic
>>>outline of a few steps that I'm finding myself going through when
>>>serializing an existing class.
>>>
>>>Step one - decide whether you want to serialize fields (ie field
>>>declarations) or properties (get/set methods). By default properties
>>>are serialized. You need to put either:
>>>
>>> @XmlAccessorType(AccessType.FIELD)
>>>
>>>or
>>>
>>> @XmlAccessorType(AccessType.PROPERTY)
>>>
>>>at the top of your class depending on which approach you want to take.
>>>
>>>Step two - identify the root element for the class, add the
>>>appropriate annotation to the top of the class:
>>>
>>> @XmlRootElement(name = "ElementName", namespace = "ElementNamespace")
>>>
>>>Having done this, give it a quick test, if you have something vaguely
>>>resembling a javabean JAXB should spit something out - the top level
>>>element will be ok, but you may find you need to tweak various bits
>>>and pieces.
>>>
>>>I've found setting field access (step one) is easiest (so far - I've
>>>only just started!). So the rest of this assumes you're using field
>>>access.
>>>
>>>Step three - identify the type of the element, and the order of the
>>>fields to be serialized. I'm assuming that your element is a complex
>>>type, and it contains a sequence or all group. To identify the type
>>>of element use the XmlType annotation. If your element contains an
>>>anonymous type do this:
>>>
>>> @XmlType(name = "")
>>>
>>>or if you have a global type, do this:
>>>
>>> @XmlType(name = "TypeName, namespace = "TypeNamespace")
>>>
>>>Step four - Specify the order of the fields to be serialized. We do
>>>this by adding the propOrder attribute (???) to the XmlType
>>>annotation. Suppose you have two fields, foo and bar, and you want
>>>foo to appear before bar, do this (note that I'm assuming you're using
>>>an anonymous type, if you're using a global type change this to suit):
>>>
>>> @XmlType(name = "", propOrder = { "foo", "bar" })
>>>
>>>Step five - Customize the mappings. Suppose you want foo to map to an
>>>element called "SomethingElse" then find the field foo:
>>>
>>> private String foo;
>>>
>>>and annotate it as follows:
>>>
>>> @XmlElement(name = "SomethingElse", namespace =
>>>"ElementNamespace", type=String.class)
>>> private String foo;
>>>
>>>Note also the namespace and type of the field.
>>>
>>>Step six - Customize other types. Suppose bar is in fact another type:
>>>
>>> private MyClass bar;
>>>
>>>public class MyClass
>>>{
>>> private String a;
>>> private String b;
>>>
>>> // .... use your imagination!
>>>}
>>>
>>>and you want to map Bar to an element called "SomeRandomName", then
>>>you need to do two things. Firstly, lets tell the field decl in our
>>>first class that's the name of the element:
>>>
>>> @XmlElement(name = "SomeRandomName" namespace = "Namespace")
>>> private MyClass bar;
>>>
>>>Secondly, we need to tell JAXB how to serialize MyClass. This is much
>>>the same as for the top level class so I wont go through it again.
>>>
>>>And that concludes my learning! Hopefully this is (a) accurate, (b)
>>>sensible, and (c) helpful. I'll keep adding to this I think, and will
>>>look forward to any constructive criticism or questions.
>>>
>>>cheers
>>>dim
>>>
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>>>
>>>
>>>
>>>
>>--
>>Kohsuke Kawaguchi
>>Sun Microsystems kohsuke.kawaguchi_at_sun.com
>>
>>
>>
>>
>>
>
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