parameter JAXBElement String

Question

I\' have simple question about JAXB. Here is the sample code:

   //setter that has input JAXBElement
   b.setBIC(JAXBElement value);

Answer 1

You can create an instance of JAXBElement directly or if you generated your Java model from an XML schema use a convience method on the generated ObjectFactory class.

package org.example.schema;

import javax.xml.bind.*;
import javax.xml.namespace.QName;

public class Demo {

    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance("org.example.schema");

        Root root = new Root();

        QName fooQName = new QName("http://www.example.org/schema", "foo");
        JAXBElement fooValue = new JAXBElement(fooQName, String.class, "FOO");
        root.setFoo(fooValue);

        ObjectFactory objectFactory = new ObjectFactory();
        JAXBElement barValue = objectFactory.createRootBar("BAR");
        root.setBar(barValue);

        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(root, System.out);
    }

}

schema.xsd

The above demo code is based on a Java model generated from the following XML schema. The reason you get a JAXBElement property in the first place is when you have an element that is both nillable="true" and minOccurs="0".

Root

The following class was generated from schema.xsd and contains properties like the one in your question.

package org.example.schema;

import javax.xml.bind.JAXBElement;
import javax.xml.bind.annotation.*;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {"foo","bar"})
@XmlRootElement(name = "root")
public class Root {

    @XmlElementRef(name = "foo", namespace = "http://www.example.org/schema", type = JAXBElement.class)
    protected JAXBElement foo;
    @XmlElementRef(name = "bar", namespace = "http://www.example.org/schema", type = JAXBElement.class)
    protected JAXBElement bar;

    public JAXBElement getFoo() {
        return foo;
    }

    public void setFoo(JAXBElement value) {
        this.foo = value;
    }

    public JAXBElement getBar() {
        return bar;
    }

    public void setBar(JAXBElement value) {
        this.bar = value;
    }

}

ObjectFactory

Below is the generated ObjectFactory class that contains convenience methods for creating the instances of JAXBElement.

package org.example.schema;

import javax.xml.bind.JAXBElement;
import javax.xml.bind.annotation.*;
import javax.xml.namespace.QName;

@XmlRegistry
public class ObjectFactory {

    private final static QName _RootFoo_QNAME = new QName("http://www.example.org/schema", "foo");
    private final static QName _RootBar_QNAME = new QName("http://www.example.org/schema", "bar");

    public Root createRoot() {
        return new Root();
    }

    @XmlElementDecl(namespace = "http://www.example.org/schema", name = "foo", scope = Root.class)
    public JAXBElement createRootFoo(String value) {
        return new JAXBElement(_RootFoo_QNAME, String.class, Root.class, value);
    }

    @XmlElementDecl(namespace = "http://www.example.org/schema", name = "bar", scope = Root.class)
    public JAXBElement createRootBar(String value) {
        return new JAXBElement(_RootBar_QNAME, String.class, Root.class, value);
    }

}