CODEWITHSUNDEEP
javaxmljaxb
mal
mal

Reputation: 3224

How can I parse a list of nested XML objects in Java with JAXB?

I've parsed objects like the following, without any issues: 

<response>
    <myObject>
        <id>1</id>
        <name>abc</name>
    </myObject>

    <myObject>
        <id>2</id>
        <name>def</name>
    </myObject>
</response>

with a class like this: 

@XmlRootElement(name="myObject")
public class MyObject{

    @XmlElement(name="id")
    long id;

    @XmlElement(name="name")
    String name;

    /* getters and setters ... etc.. */

}

This works fine, with my API calls I get a list of MyObjects as expected. but how do I handle this type of response: 

<response>
    <objectWrapper>
        <myObject>
            <id>1</id>
            <name>abc</name>
        </myObject>

        <myObject>
            <id>2</id>
            <name>def</name>
        </myObject>
    </objectWrapper>
</response>

At first I thought building an ObjectWrapper class would do the trick, like this:

@XmlRootElement(name="objectWrapper")
public class ObjectWrapper{

    @XmlElement(name="myObject")
    List<MyObject> myObject;
    /* getters and setters ... etc.. */

}

Then I thought about using @XmlElementWrapper too, but how? Can I just remove the @XmlRootElement from the class and ad @XmlElementWrapper on the list?

Edit: No, I cannot remove the @XmlRootElement

Upvotes: 0

Views: 391

Answers (2)

SomeDude
SomeDude

Reputation: 14238

It doesn't matter if your class is named ObjectWrapper or not. You need to specify correct wrapper name in @XmlElementWrapper which is objectWrapper.

Your ObjectWrapper class should look like :

@XmlRootElement( name = "response" )
@XmlAccessorType( XmlAccessType.FIELD )
public class ObjectWrapper
{
    @XmlElementWrapper( name = "objectWrapper" )
    @XmlElement( name = "myObject" )
    private List<MyObject> myObjects;


    public void setMyObjects( List<MyObject> objects )
    {
        this.myObjects  = objects;
    }

    public List<MyObject> getMyObjects()
    {
        return myObjects;

    }
}

Upvotes: 1

Thomas Fritsch
Thomas Fritsch

Reputation: 10147

You can simply write it like this:

@XmlRootElement(name="response")
public class Response {

    @XmlElementWrapper(name="objectWrapper")
    @XmlElement(name="myObject")
    List<MyObject> myObject;
    /* getters and setters ... etc.. */

}

You don't need an ObjectWrapper class.

Upvotes: 1

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