Using JAXB generated class for an element that requires an integer with a pattern

Question

I have an element in my XML Schema that is defined as follows:

Answer 1

You could do the following:

NumberFormatter

You can do this by writing your own formatter:

package forum7182533;

public class NumberFormatter {

    public static String printInt(Integer value) {
        String result = String.valueOf(value);
        for(int x=0, length = 7 - result.length(); x

XMLSchema (format.xsd)

Then when you are going to generate your classes from your XML Schema:

bindings.xml

You will leverage a JAXB bindings file to reference your formatter:

XJC Call

The bindings file is referenced in the XJC call as:

xjc -d out -p forum7182533 -b bindings.xml format.xsd

Adapter1

This will cause an XmlAdapter to be created that leverages your formatter:

package forum7182533;

import javax.xml.bind.annotation.adapters.XmlAdapter;

public class Adapter1
    extends XmlAdapter
{


    public Integer unmarshal(String value) {
        return (forum7182533.NumberFormatter.parseInt(value));
    }

    public String marshal(Integer value) {
        return (forum7182533.NumberFormatter.printInt(value));
    }

}

Root

The XmlAdapter will be referenced from your domain object using the @XmlJavaTypeAdapter annotation:

package forum7182533;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "number"
})
@XmlRootElement(name = "root")
public class Root {

    @XmlElement(required = true, type = String.class)
    @XmlJavaTypeAdapter(Adapter1 .class)
    protected Integer number;

    public Integer getNumber() {
        return number;
    }

    public void setNumber(Integer value) {
        this.number = value;
    }

}

Demo

Now if you run the following demo code:

package forum7182533;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;

public class Demo {

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

        Root root = new Root();
        root.setNumber(4);

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

Output

You will get the desired output:

    0000004