I have a deep XML structure with a lot of pointless wrappers I'm mapping to a single Java class. Mapping the simple datatypes with @XmlPath is a walk in the park, but when it comes to types that actually require their own class I'm not quite sure how to do it, especially when those types should be put in a list as well.
I'm having problems to map all the element types in the below example to my Element class. Since the elements wrapper resides in resource which is mapped using @XmlPath I can not use the @XmlElementWrapper, which would otherwise be the way I usually would do this.
Example XML structure
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<s:root xsi:schemaLocation="http://www.example.eu/test ResourceSchema.xsd" xmlns:s="http://www.example.eu/test" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<s:resource>
<s:information>
<s:date>2013-07-04</s:date>
<s:name>This example does not work</s:name>
</s:information>
<s:elements>
<s:refobj>
<s:id>1</s:id>
<s:source>First Source</s:source>
</s:refobj>
<s:refobj>
<s:id>2</s:id>
<s:source>Second Source</s:source>
</s:refobj>
<s:refobj>
<s:id>5</s:id>
<s:source>Fifth Source</s:source>
</s:refobj>
</s:elements>
</s:resource>
</s:root>
Root.java
@XmlRootElement(name = "root")
@XmlAccessorType(XmlAccessType.FIELD)
public class Root {
@XmlPath("resource/information/date/text()")
private String date;
@XmlPath("s:resource/s:information/s:name/text()")
private String name;
@XmlPath("resource/elements/refobj")
private List<RefObj> refObjs;
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
RefObj.java
@XmlRootElement(name = "refobj")
@XmlAccessorType(XmlAccessType.FIELD)
public class RefObj {
@XmlElement(name = "id")
private int id;
@XmlElement(name = "source")
private String source;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getSource() {
return source;
}
public void setSource(String source) {
this.source = source;
}
}
Marshaller/Unmarshaller
public static void main(String[] args) {
String xml = getXML();
Root root = null;
try {
JAXBContext context = JAXBContext.newInstance(Root.class);
Unmarshaller unmarshaller = context.createUnmarshaller();
StringReader stringReader = new StringReader(xml);
root = (Root) unmarshaller.unmarshal(stringReader);
} catch (Exception ex) {
System.err.println("Failed to unmarshal XML!");
}
try {
JAXBContext context = JAXBContext.newInstance(Root.class);
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
marshaller.setProperty(Marshaller.JAXB_SCHEMA_LOCATION, "http://www.example.eu/test ResourceSchema.xsd");
StringWriter stringWriter = new StringWriter();
marshaller.marshal(root, stringWriter);
System.out.println(new String(stringWriter.toString().getBytes(Charset.forName("UTF-8"))));
} catch (Exception ex) {
System.err.println("Failed to marshal object!");
}
}
package-info.java
@XmlSchema(
namespace = "http://www.example.eu/test",
attributeFormDefault = XmlNsForm.QUALIFIED,
elementFormDefault = XmlNsForm.QUALIFIED,
xmlns = {
@XmlNs(
prefix = "s",
namespaceURI = "http://www.example.eu/test")
},
location = "http://www.example.eu/test ResourceSchema.xsd")
package se.example.mavenproject1;
import javax.xml.bind.annotation.XmlNs;
import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;
I can execute the application, but no element is mapped when I unmarshal/marshal the XML content, instead I get a XML representation containing just the information.
Update
After posting the previous example I realized that it actually worked as intended, which made me even more confused. Although I've tried to replicate the (previously) working example in my production code without any success, although I've managed to actually introduce the problems I'm having into the example code. Since I needed to add a namespace for the problems to appear I'm assuming it has something to do with naming conventions and X(ml)Path.
I've also added package-info.java and the marshaller/unmarshaller I'm using when working with those objects. Since the jaxb.properties doesn't contain anything exciting I've left it out.