Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.StringReader;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElementDecl;
import javax.xml.bind.annotation.XmlElementRef;
import javax.xml.bind.annotation.XmlElementRefs;
import javax.xml.bind.annotation.XmlRegistry;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.namespace.QName;

public class Main {

    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance(Foo.class, ObjectFactory.class);

        StringReader xml = new StringReader("<foo><C>Hello World</C></foo>");
        Unmarshaller unmarshaller = jc.createUnmarshaller();
        Foo foo = (Foo) unmarshaller.unmarshal(xml);

        JAXBElement<?> aOrBOrCOrD = foo.aOrBOrCOrD;
        System.out.println(aOrBOrCOrD.getName().getLocalPart());
        System.out.println(aOrBOrCOrD.getDeclaredType());
        System.out.println(aOrBOrCOrD.getValue());
    }

    @XmlRootElement
    @XmlAccessorType(XmlAccessType.FIELD)
    public static class Foo {

        @XmlElementRefs({ @XmlElementRef(name = "A", type = JAXBElement.class),
                @XmlElementRef(name = "B", type = JAXBElement.class),
                @XmlElementRef(name = "C", type = JAXBElement.class),
                @XmlElementRef(name = "D", type = JAXBElement.class) })
        protected JAXBElement<?> aOrBOrCOrD;

    }

    @XmlRegistry
    public static class ObjectFactory {

        @XmlElementDecl(name = "A")
        public JAXBElement<String> createA(String value) {
            return new JAXBElement<String>(new QName("A"), String.class, value);
        }

        @XmlElementDecl(name = "B")
        public JAXBElement<Integer> createB(Integer value) {
            return new JAXBElement<Integer>(new QName("B"), Integer.class, value);
        }

        @XmlElementDecl(name = "C")
        public JAXBElement<String> createC(String value) {
            return new JAXBElement<String>(new QName("C"), String.class, value);
        }

        @XmlElementDecl(name = "D")
        public JAXBElement<String> createD(String value) {
            return new JAXBElement<String>(new QName("D"), String.class, value);
        }

    }
}