You can use the @XmlAnyElement
annotation as described by bmargulies. To map to the object model in your question you can leverage a DOMHandler
.
Main
import javax.xml.bind.annotation.*;
@XmlRootElement(name="main")
@XmlAccessorType(XmlAccessType.FIELD)
public class Main {
private String name;
private Integer maxInstances;
@XmlAnyElement(value=ParameterHandler.class)
private String parameters;
}
ParameterHandler
import java.io.*;
import javax.xml.bind.ValidationEventHandler;
import javax.xml.bind.annotation.DomHandler;
import javax.xml.transform.Source;
import javax.xml.transform.stream.*;
public class ParameterHandler implements DomHandler<String, StreamResult> {
private static final String PARAMETERS_START_TAG = "<parameters>";
private static final String PARAMETERS_END_TAG = "</parameters>";
private StringWriter xmlWriter = new StringWriter();
public StreamResult createUnmarshaller(ValidationEventHandler errorHandler) {
return new StreamResult(xmlWriter);
}
public String getElement(StreamResult rt) {
String xml = rt.getWriter().toString();
int beginIndex = xml.indexOf(PARAMETERS_START_TAG) + PARAMETERS_START_TAG.length();
int endIndex = xml.indexOf(PARAMETERS_END_TAG);
return xml.substring(beginIndex, endIndex);
}
public Source marshal(String n, ValidationEventHandler errorHandler) {
try {
String xml = PARAMETERS_START_TAG + n.trim() + PARAMETERS_END_TAG;
StringReader xmlReader = new StringReader(xml);
return new StreamSource(xmlReader);
} catch(Exception e) {
throw new RuntimeException(e);
}
}
}
Demo
import java.io.File;
import javax.xml.bind.*;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(Main.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
Main main = (Main) unmarshaller.unmarshal(new File("input.xml"));
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(main, System.out);
}
}