JAXB, XMLAdapter a primitivny typ

[Radovana Straube]

Dobry den,

mam XML-data s elementami typu:
<odpoved1>j</odpoved1>
<odpoved2>j</odpoved2>
j = ano (Ja)
n = nie (Nein)
a potrebujem pouzit unmarshalling, ktory mi tieto stringy prevedie na booleany. XmlAdapter som uz parkrat uspesne pouzila pri konvertovani stringov na stringy, ale konverziu boolean-string neviem rozchodit (autoboxing by mal snad fungovat).

public class BooleanAdapter extends XmlAdapter<String, Boolean> {

    @Override
    public Boolean unmarshal(String _sValue) {
        boolean value = BooleanType.YES.equals(_sValue);
        return new Boolean(value);
    }
    
    @Override
    public String marshal(Boolean _value){
        if (_value) {
            return BooleanType.YES.value;
        } else {
            return BooleanType.NO.value;
        }
    }   
}


@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Zeichen {

    @XmlJavaTypeAdapter(BooleanAdapter.class)
    @XmlElement(name="faeulnis")
    private boolean faeulnis;
    
    public boolean isFaeulnis() {
        return faeulnis;
    }
        
    public void setFaeulnis(boolean faeulnis) {
        this.faeulnis = faeulnis;
    }
....

Pri spusteni dostanem nasledovnu chybu:
com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions
Adapter de.bolsys.stala.mortality.data.model.adapter.BooleanAdapter is not applicable to the field type boolean. 
        this problem is related to the following location:
                at @javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter(type=class javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter$DEFAULT, value=class de.bolsys.stala.mortality.data.model.adapter.BooleanAdapter)
                at private boolean de.bolsys.stala.mortality.data.model.Zeichen.faeulnis

Nasla som na Internete, ze aj primitivne typy by mali fungovat ale popisane riesenie mi bohuzial nefungovalo. Vedel by mi prosim nieto poradit ako na to?

Dakujem
Radovana Straube