Java – unmarshalling with multiple namespaces

So, suppose I have several namespaces of XML

<Envelope xmlns:pdi="http://www.mypage.com/schemas/pdi" xmlns:ib="http://www.mypage.com/schemas/ib" xmlns="http://www.mypage.com/schemas/envelope">
  <Product>
    <pdi:number>123456</pdi:number>
  </Product>
  <Instance>
    <ib:serial>abcdefg</ib:serial>
  </Instance>
</Envelope>

I'm trying to build a client for it I have an envelope POJO like this

@XmlRootElement(name ="Envelope",namespace = "http://www.mypage.com/schemas/envelope")
public class Envelope

Inside, it has these properties

@XmlElement(name="Product",namespace = "http://www.mypage.com/schemas/pdi")
public Product getProduct(){...}

@XmlElement(name="Instance",namespace = "http://www.mypage.com/schemas/ib")
public Instance getInstance(){...}

In addition, the product POJO is as follows:

@XmlRootElement(name="Product",namespace = "http://www.mypage.com/schemas/pdi")
public class Product

And properties

@XmlElement(name="pdi:number",namespace = "http://www.mypage.com/schemas/pdi")
public int getNumber(){...}

For some reason, I can't get the product number I keep getting requests wrong Do I handle namespaces correctly, or do I miss something?

Solution

For this use case, I recommend using package level @ XMLSchema annotation to specify namespace qualification

package-info(forum14651918 / package-info.java)

@XmlSchema(
    namespace="http://www.mypage.com/schemas/envelope",elementFormDefault=XmlNsForm.QUALIFIED,xmlns={
            @XmlNs(namespaceURI = "http://www.mypage.com/schemas/envelope",prefix = ""),@XmlNs(namespaceURI = "http://www.mypage.com/schemas/ib",prefix = "ib"),@XmlNs(namespaceURI = "http://www.mypage.com/schemas/pdi",prefix = "pdi")
    }
)
@XmlAccessorType(XmlAccessType.FIELD)
package forum14651918;

import javax.xml.bind.annotation.*;

Envelope (forum14651918 / envelope. Java)

Since we specified the namespace and elementformdefault on the @ XMLSchema annotation, we will use http://www.mypage.com/schemas/envelope The namespace automatically qualifies all elements corresponding to the envelope class

package forum14651918;

import javax.xml.bind.annotation.*;

@XmlRootElement(name="Envelope")
public class Envelope {

    @XmlElement(name="Product")
    private Product product;

    @XmlElement(name="Instance")
    private Instance instance;

}

Product (forum14651918 / product. Java)

You can override the namespace of the product class with the @ xmltype annotation

package forum14651918;

import javax.xml.bind.annotation.*;

@XmlType(namespace="http://www.mypage.com/schemas/pdi")
public class Product {

    private int number;

}

Instance (forum14651918 / instance. Java)

You can override the namespace of the instance class with the @ xmltype annotation

package forum14651918;

import javax.xml.bind.annotation.XmlType;

@XmlType(namespace="http://www.mypage.com/schemas/ib")
public class Instance {

    private String serial;

}

Demo (forum14651918 / demo. Java)

Here are some code that you can run to prove that everything is normal

import java.io.File;
import javax.xml.bind.*;

public class Demo {

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

        Unmarshaller unmarshaller = jc.createUnmarshaller();
        File xml = new File("src/forum14651918/input.xml");
        Envelope envelope = (Envelope) unmarshaller.unmarshal(xml);

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

}

For more information

> http://blog.bdoughan.com/2010/08/jaxb-namespaces.html > http://blog.bdoughan.com/2011/11/jaxb-and-namespace-prefixes.html > http://blog.bdoughan.com/2011/06/using-jaxbs-xmlaccessortype-to.html