BarAdapter.java Source code

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Here is the source code for BarAdapter.java

Source

import java.io.File;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.adapters.XmlAdapter;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

class BarAdapter extends XmlAdapter<Object, Bar> {
    private DocumentBuilder documentBuilder;

    public BarAdapter() {
        try {
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            documentBuilder = dbf.newDocumentBuilder();
        } catch (Exception e) {
        }
    }

    @Override
    public Bar unmarshal(Object v) throws Exception {
        Bar bar = new Bar();
        Element element = (Element) v;
        bar.value = element.getTextContent();
        return bar;
    }

    @Override
    public Object marshal(Bar v) throws Exception {
        Document document = documentBuilder.newDocument();
        Element root = document.createElement("bar");
        root.setTextContent(v.value);
        return root;
    }
}

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
class Foo {
    @XmlJavaTypeAdapter(BarAdapter.class)
    private Bar bar;
}

@XmlAccessorType(XmlAccessType.FIELD)
class Bar {
    String value;
}

public class Main {
    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance(Foo.class);
        Unmarshaller unmarshaller = jc.createUnmarshaller();
        File xml = new File("data.xml");
        Foo foo = (Foo) unmarshaller.unmarshal(xml);

        Marshaller marshaller = jc.createMarshaller();
        marshaller.setAdapter(new BarAdapter());
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(foo, System.out);
    }
}