Absent Code attribute in method that is not native

[Felipe Gaúcho]

I created a set of types annotated both as JAXB elements and JPA
entities.. I can marshall the XML from the classes but I can't
unmarshall the XML back due to the following error:

java.lang.ClassFormatError: Absent Code attribute in method that is
not native or abstract in class file javax/persistence/FetchType
        at java.lang.ClassLoader.defineClass1(Native Method)

Any clue ?

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[Paul Sandoz]

On Apr 14, 2009, at 1:16 PM, Felipe Gaúcho wrote:

> I created a set of types annotated both as JAXB elements and JPA
> entities.. I can marshall the XML from the classes but I can't
> unmarshall the XML back due to the following error:
>
> java.lang.ClassFormatError: Absent Code attribute in method that is
> not native or abstract in class file javax/persistence/FetchType
> at java.lang.ClassLoader.defineClass1(Native Method)
>
> Any clue ?
>

I think that is because you are depending on stubbed javaee jar.

http://forums.java.net/jive/message.jspa?messageID=226931

Paul.

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[Felipe Gaúcho]

unfortunately not ... but I mapped the problem symptom :

the JPA annotation @GeneratedValue
causes problems with JAXB ..

If I remove this annotation, everything works... but if I include I
have the following exception:

java.lang.ClassFormatError: Absent Code attribute in method that is
not native or abstract in class file javax/persistence/GenerationType
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
        ....

This is a sample of class where the problem happens:

@XmlType(namespace = "http://footprint.dev.java.net/service/entity")
@XmlAccessorOrder(XmlAccessOrder.ALPHABETICAL)
@XmlAccessorType(XmlAccessType.FIELD)
@MappedSuperclass
public abstract class AbstractFootprintEntity implements Serializable {
        @XmlElement
        @Id
        @GeneratedValue(strategy = GenerationType.AUTO) // here :(
        private long id;

        ......
}

apparently the annotation GenerationType is not serializable by the
JAXB  framework....

if one of you know a trick or workaround, please ...

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[Felipe Gaúcho]

also the @Temporal  causes problems:

        @XmlElement
        @Column(nullable = true)
        @Temporal(TemporalType.DATE)
        private Date expireDate;

if I remove this @Temporal, jaxb marshall the type without problems..

may I use an adapter or something like that to fix the problem or JAXB
and JPA annotations are incompatibles ?



2009/4/14 Felipe Gaúcho <[hidden email]>:

> unfortunately not ... but I mapped the problem symptom :
>
> the JPA annotation      @GeneratedValue
> causes problems with JAXB ..
>
> If I remove this annotation, everything works... but if I include I
> have the following exception:
>
> java.lang.ClassFormatError: Absent Code attribute in method that is
> not native or abstract in class file javax/persistence/GenerationType
>        at java.lang.ClassLoader.defineClass1(Native Method)
>        at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
>        ....
>
> This is a sample of class where the problem happens:
>
> @XmlType(namespace = "http://footprint.dev.java.net/service/entity")
> @XmlAccessorOrder(XmlAccessOrder.ALPHABETICAL)
> @XmlAccessorType(XmlAccessType.FIELD)
> @MappedSuperclass
> public abstract class AbstractFootprintEntity implements Serializable {
>        @XmlElement
>        @Id
>        @GeneratedValue(strategy = GenerationType.AUTO) // here :(
>        private long id;
>
>        ......
> }
>
> apparently the annotation GenerationType is not serializable by the
> JAXB  framework....
>
> if one of you know a trick or workaround, please ...
>

--

Please help to test this application:
http://fgaucho.dyndns.org:8080/cejug-classifieds-richfaces

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[Paul Sandoz]

Hi,

Does any JPA annotation cause the same issue?

What jar are you using for the JPA annotations?

The class loading error is very low-level.

I do not know enough about JAXB with JPA to be of much help :-( i know  
that there are frameworks like HyperJAXB that work with both.

Paul.

On Apr 14, 2009, at 7:16 PM, Felipe Gaúcho wrote:

> also the @Temporal  causes problems:
>
> @XmlElement
> @Column(nullable = true)
> @Temporal(TemporalType.DATE)
> private Date expireDate;
>
> if I remove this @Temporal, jaxb marshall the type without problems..
>
> may I use an adapter or something like that to fix the problem or JAXB
> and JPA annotations are incompatibles ?
>
>
>
> 2009/4/14 Felipe Gaúcho <[hidden email]>:
>> unfortunately not ... but I mapped the problem symptom :
>>
>> the JPA annotation      @GeneratedValue
>> causes problems with JAXB ..
>>
>> If I remove this annotation, everything works... but if I include I
>> have the following exception:
>>
>> java.lang.ClassFormatError: Absent Code attribute in method that is
>> not native or abstract in class file javax/persistence/GenerationType
>>        at java.lang.ClassLoader.defineClass1(Native Method)
>>        at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
>>        ....
>>
>> This is a sample of class where the problem happens:
>>
>> @XmlType(namespace = "http://footprint.dev.java.net/service/entity")
>> @XmlAccessorOrder(XmlAccessOrder.ALPHABETICAL)
>> @XmlAccessorType(XmlAccessType.FIELD)
>> @MappedSuperclass
>> public abstract class AbstractFootprintEntity implements  
>> Serializable {
>>        @XmlElement
>>        @Id
>>        @GeneratedValue(strategy = GenerationType.AUTO) // here :(
>>        private long id;
>>
>>        ......
>> }
>>
>> apparently the annotation GenerationType is not serializable by the
>> JAXB  framework....
>>
>> if one of you know a trick or workaround, please ...
>>
>
>
>
> --
>
> Please help to test this application:
> http://fgaucho.dyndns.org:8080/cejug-classifieds-richfaces
>
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[Paul Sandoz]

Hi,

I cannot reproduce.

I modified the jabx sample distributed with Jersey (see attached) so  
that a JAXB bean is as follows:

@XmlRootElement
public class JAXBXmlRootElement {

     @Id
     @GeneratedValue(strategy = GenerationType.AUTO)
     public String value;


that bean is marshalled and unmarshalled by the unit tests without any  
failures.

Paul.






On Apr 14, 2009, at 7:10 PM, Felipe Gaúcho wrote:

> unfortunately not ... but I mapped the problem symptom :
>
> the JPA annotation @GeneratedValue
> causes problems with JAXB ..
>
> If I remove this annotation, everything works... but if I include I
> have the following exception:
>
> java.lang.ClassFormatError: Absent Code attribute in method that is
> not native or abstract in class file javax/persistence/GenerationType
> at java.lang.ClassLoader.defineClass1(Native Method)
> at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
>        ....
>
> This is a sample of class where the problem happens:
>
> @XmlType(namespace = "http://footprint.dev.java.net/service/entity")
> @XmlAccessorOrder(XmlAccessOrder.ALPHABETICAL)
> @XmlAccessorType(XmlAccessType.FIELD)
> @MappedSuperclass
> public abstract class AbstractFootprintEntity implements  
> Serializable {
> @XmlElement
> @Id
> @GeneratedValue(strategy = GenerationType.AUTO) // here :(
> private long id;
>
>        ......
> }
>
> apparently the annotation GenerationType is not serializable by the
> JAXB  framework....
>
> if one of you know a trick or workaround, please ...
>
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