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Problem Deserializing Xmlrefid And Customizing JAXB Unmarshaller (Doc ID 1330790.1)

Last updated on SEPTEMBER 25, 2020

Applies to:

Oracle WebLogic Server - Version 10.3.4 and later
Information in this document applies to any platform.

Symptoms

JAXB types: <CLASSNAME1>, <CLASSNAME2>, <CLASSNAME3>, <CLASSNAME4>

 @XmlRootElement
public class <CLASSNAME1> extends <CLASSNAME3> implements Serializable {
...
public class Country extends <CLASSNAME3> implements Serializable {

 @XmlAccessorType(XmlAccessType.FIELD)
 @XmlRootElement
public class <CLASSNAME3> implements <CLASSNAME4> {

 @XmlID
private String id;

 @XmlIDREF
private <CLASSNAME3> parent;

public interface <CLASSNAME4> {
public void setId(String id);
}
...

<CLASSNAME1>/<CLASSNAME2> extends <CLASSNAME3>, which has a id field, also a parent field.  The parent is another instance of <CLASSNAME3>.

A dummy <CLASSNAME1> instance is initialized like the following:

<CLASSNAME1> city = new <CLASSNAME1>();
...
city.setId(cityId);
...
city.setParent(state);

which the state is:

<CLASSNAME3> state = new <CLASSNAME3>();
...
state.setId("2345678");
...
state.setParent(country);

which the country is:

<CLASSNAME2> country = new <CLASSNAME3>();
...
country.setId("3456789");
...
country.setParent(null);

After the <CLASSNAME1> is marshalled, then unmarshalled, the following output is observed:

code:xxx, createdBy:xx, defaultName:xxxx, lastUpdatedBy:xx, reportName:xxxx, type:CITY, createdDt:<DATE>, lastUpdatedDt:<DATE>, id:123456, inactiveEffectiveDate:<DATE>, parent:null, alternativeNames:xxxx, timeZones:xxxxx utilDate : <DATE>, postalCodes: xxxx, customerGroupRegionCode: xxx, cy : true, defaultPostalCode: xxx, door : true, latitude : xxx, longitude : xxx, opZoneCode : xxx, shippingPoint : true, sqlDate :<DATE>, unLocationCode : null

As can be seen, the parent bit is null.

When using custom IDResolver:

public Callable resolve(final String id, Class targetType) {
final String className=targetType.getCanonicalName();
return new Callable() {
public Object call() {
System.out.println("Id:" + id + ", targetType:" + className);
return createObjectWithId(className, id);
}
};
}

private Object createObjectWithId(String className, String idValue) {
Object object = null;
try {
Class classDefinition = Class.forName(className);
object = classDefinition.newInstance();
((<CLASSNAME4>) object).setId(idValue);
} catch (InstantiationException e) {
System.out.println(e);
} catch (IllegalAccessException e) {
System.out.println(e);
} catch (ClassNotFoundException e) {
System.out.println(e);
}
return object;
}

}

The output is:

code:xxx, createdBy:xx, defaultName:xxxx, lastUpdatedBy:xxx, reportName:xxx, type:xxx, createdDt:<DATE>, lastUpdatedDt:<DATE>, id:123456, inactiveEffectiveDate:<DATE>, parent: [ code:null, createdBy:null, defaultName:null, lastUpdatedBy:null, reportName:null, type:null, createdDt:null, lastUpdatedDt:null, id:2345678, inactiveEffectiveDate:null, parent:null, alternativeNames:null, timeZones:null], alternativeNames:xxx, timeZones:xxx utilDate : <DATE>, postalCodes: xxx, customerGroupRegionCode: xxx, cy : xxx, defaultPostalCode: xxx, door : xx, latitude : xx, longitude : xx, opZoneCode : xx, shippingPoint : xx, sqlDate : <DATE>, unLocationCode : null

Observe that the parent bit is:

[ code:null, createdBy:null, defaultName:null, lastUpdatedBy:null, reportName:null, type:null, createdDt:null, lastUpdatedDt:null, id:2345678, inactiveEffectiveDate:null, parent:null, alternativeNames:null, timeZones:null]

id:2345678 is the state id set earlier.  The rest are null as expected as the IDResolver doesn't set other fields.

However, with JAX-WS web service deployed on WebLogic, there is no way to gain access to JAXB unmashaller, thus cannot set the custom IDResolver.

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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