Java – JAXB, custom binding, adapter1 Class and joda time

I have a problem. JAXB is generating binding classes for XML schema (I can't modify them for precision)

public class DateAdapter extends XmlAdapter<String,LocalDate> {
    private static DateTimeFormatter fmt = DateTimeFormat.forPattern("yyyyMMdd");

    public LocalDate unmarshal(String v) throws Exception {
        return fmt.parseLocalDate(v);
    }

    public String marshal(LocalDate v) throws Exception {
        return v.toString("yyyyMMdd");
    }
}

I add the following to my global binding file:

<jaxb:globalBindings>
        <jaxb:javaType name="org.joda.time.LocalDate" xmlType="xs:date"
            parseMethod="my.classes.adapters.DateAdapter.unmarshal"
            printMethod="my.classes.adapters.DateAdapter.marshal" />
    </jaxb:globalBindings>

The problem is that when I try to compile my project with maven, it fails with the following error:

[ERROR] \My\Path\MyProject\target\generated-sources\xjc\my\classes\generated\Adapter1.java:[20,59] non-static method unmarshal(java.lang.String) cannot be referenced from a static context
[ERROR] \My\Path\MyProject\target\generated-sources\xjc\my\classes\generated\Adapter1.java:[24,59] non-static method marshal(org.joda.time.LocalDate) cannot be referenced from a static context

... this is where things get strange JAXB generates a class adapter1, which contains the following contents:

public class Adapter1
    extends XmlAdapter<String,LocalDate>
{


    public LocalDate unmarshal(String value) {
        return (my.classes.adapters.DateAdapter.unmarshal(value));
    }

    public String marshal(LocalDate value) {
        return (my.classes.adapters.DateAdapter.marshal(value));
    }

}

…. This is the source of compilation errors

Now my question is:

>My adapter overrides xmladapter, I can't make the method static How can I avoid this? > I can avoid generation adapter 1 Class? Maybe use package level annotation xmljavatypeadapters. If so, what should I do? (JAXB generates its own package info. Java...)

I hope I've made my situation clear. Thank you

Solution

You do not need to extend xmladapter

Just create a static method on the POJO

Example:

public class DateAdapter {
    private static DateTimeFormatter fmt = DateTimeFormat.forPattern("yyyyMMdd");

    public static LocalDate unmarshal(String v) throws Exception {
        return fmt.parseLocalDate(v);
    }

    public static String marshal(LocalDate v) throws Exception {
        return v.toString("yyyyMMdd");
    }
 }