JAXB Marshall/Unmarshall a class object with List variable member

Question

I'm trying to load a series of XML files using JAXB to create several Lists of Objects for each Class.

Tile Class

import java.util.List;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement//(name="Tiles")
@XmlAccessorType(XmlAccessType.FIELD)
public class Tile {

    private String name;
    public String getName(){
        return name;
    }
    public void  setName(String arg){
        this.name = arg;
    }

    private int id;
    public int getId() {
        return id;
    }
    public void setId(int arg){
        this.id = arg;
    }

    private String imageName;
    public String getImageName(){
        return imageName;
    }
    public void setImageName(String imageName) {
        this.imageName = imageName;
    }

    private int drawType;
    public int getDrawType(){
        return drawType;
    }
    public void setDrawType(int drawType) {
        this.drawType = drawType;
    }

    private int trueType;
    public int getTrueType() {
        return trueType;
    }
    public void setTrueType(int trueType) {
        this.trueType = trueType;
    }

    private int count;
    public int getCount(){
        return count;
    }
    public void setCount(int count) {
        this.count = count;
    }

    private List<Integer> side;
    public Integer getSide(int arg){
        return side.get(arg);
    }
    public void setSide(List<Integer> side) {
        this.side = side;
    }

    private int feature;
    public int getFeature (){
        return feature;
    }
    public void setFeature(int feature) {
        this.feature = feature;
    }
 }

So while I'm really trying to unmarshal the XML, I figured it is a good idea to first Marshal a test instance of the class, to confirm the format of the resulting XML file.

JAXBContext jc = JAXBContext.newInstance(Tile.class,JAXB2_Lists.class,Feature.class );

JAXB2_Lists<Tile> exportTest = new JAXB2_Lists<>();
Marshaller marshaller = jc.createMarshaller();

Tile testTile = new Tile();
testTile.setCount(1);
testTile.setDrawType(1);
testTile.setFeature(1);
testTile.setId(1);
testTile.setImageName("TestImage.png");
testTile.setName("Test Name");
testTile.setTrueType(1);
List<Integer> sides = new ArrayList<>();
testTile.setSide(sides);

exportTest.getValues().add(testTile);

marshaller.marshal(exportTest, new File("TilesExport.xml"));

The resulting XML looks like the following.

<jaxb2Lists>
    <tile>
        <name>Test Name</name>
        <id>1</id>
        <imageName>TestImage.png</imageName>
        <drawType>1</drawType>
        <trueType>1</trueType>
        <count>1</count>
        <feature>1</feature>
    </tile>
</jaxb2Lists>

The JAXB_List class is detailed at the following URL, another question of mine. (no one apparently has an answer for it. https://stackoverflow.com/questions/38472060/dynamic-xmlrootelement-name

So the resulting XML has all the values except for the Sides member variable.

Where am I going wrong?

Answer 1

You need a public getter for your sides list, and the setter needs to be named sides . Something like:

public List<Integer> getSides() {
    return side;
}
public void setSides(List<Integer> sides) {
    this.side = sides;
}

should do it. Might also be worth renaming your side field to sides for the sake of consistency.