CODEWITHSUNDEEP
javajaxb
denys
denys

Reputation: 2519

jaxb how to marshall values in some order?

f.e I want to have an xml where values of my collection is stored in alphabetical order:

<tag1>a</tag1>
<tag1>b</tag1>
<tag1>c</tag1>

is it possible with jaxb?

Thank you.

Upvotes: 2

Views: 1053

Answers (2)

user647772
user647772

Reputation:

Use an ordered collection on the Java side of things.

Root

The tag1 property is a SortedSet. You could pass in a Comparator when you create the TreeSet:

package forum9096805;

import java.util.*;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Root {

    private SortedSet<String> tag1 = new TreeSet<String>();

    public SortedSet<String> getTag1() {
        return tag1;
    }

    public void setTag1(SortedSet<String> tag1) {
        this.tag1 = tag1;
    }

}

Demo

package forum9096805;

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.getTag1().add("b");
        root.getTag1().add("c");
        root.getTag1().add("a");

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

}

Output

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root>
    <tag1>a</tag1>
    <tag1>b</tag1>
    <tag1>c</tag1>
</root>

Upvotes: 3

Aravind Yarram
Aravind Yarram

Reputation: 80176

Question should be: Is it possible in XSD (XML Schmea)? And the answer is NO. But you can make sure the XML instance is containing the data in alphabetical order by using ordered collection like List implementations or an array.

Upvotes: 2

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