XML parser using jaxb

Question

How do I get the object of a nested xml using jaxb. I have the following XML -

<?xml version="1.0" ?>
    <file>
    <markups>
    <markup>
        <author>author</author>
        <name>3w2fg</name>
        <source>Mobile_iPad</source>
        <createdOn>2013-05-20T11:22:23</createdOn>
        <entities>
            <entity>
                <entityWdth>209</entityWdth>
                <entityColor>
                    <red>127.5</red>
                    <green>0</green>
                    <blue>127.5</blue>
                </entityColor>
                <entityFillColor>
                    <red>227.5</red>
                    <green>0</green>
                    <blue>327.5</blue>
                </entityFillColor>
                <entityRadian>0</entityRadian>
                <entityEndY>304</entityEndY>
                <entityStX>438</entityStX>
                <entityTypeCode>7</entityTypeCode>
                <entityPageNo>1</entityPageNo>
                <entityHt>183</entityHt>
                <entityCenterX>542.5</entityCenterX>
                <entityName>Rectangle</entityName>
                <entityStY>121</entityStY>
                <entityEndX>647</entityEndX>
                <entityCenterY>212.5</entityCenterY>
            </entity>
        </entities>
    </markup>
</markups>
<name>7987ab12-4915-49e5-8bbd-f98d6054ef6b.JPG</name>
<fileName>IMG_0008.JPG</fileName>
</file>

I am using jaxb to unmarshal this as under -

JAXBContext jbContext = JAXBContext.newInstance(com.arc.markupinfo.generated.File.class);
com.arc.markupinfo.generated.ObjectFactory factory = new    com.arc.markupinfo.generated.ObjectFactory();
com.arc.markupinfo.generated.File fileObj = factory.createFile();
Unmarshaller unmarshaller = jbContext.createUnmarshaller();
fileObj = (com.arc.markupinfo.generated.File) unmarshaller.unmarshal(new   File(xmlLocation));
fileObj.getFileName();

The object is created with all the values except the entityColor.Red ... and entityFillColor.Red.... These values come as 0,0,0 while the xml shows that it has proper values

What does the corresponding object model look like?

bdoughan
– bdoughan

2013-05-21 12:11:01 +00:00
Commented May 21, 2013 at 12:11 — bdoughan
– bdoughan, Commented May 21, 2013 at 12:11

Ilya · Accepted Answer · 2013-05-22 11:04:04Z

1

entityColor.Red ... and entityFillColor.Red ... have type int (Integer).
Use double (Double), float (Float) or String for you colors in Color object.

@XmlAccessorType(XmlAccessType.FIELD)
public class Entity 
{
   //...
   private Color entityColor;
   private Color entityFillColor;
   //...
}  

@XmlAccessorType(XmlAccessType.FIELD)
public class Color 
{
   private double red;   // or float, or String
   private double green; // or float, or String
   private double blue;  // or float, or String
}

Also you can unmarshal your example is simplest way:

File file = javax.xml.bind.JAXB
   .unmarshal(new java.io.File(xmlLocation),File.class);

answered May 22, 2013 at 11:04

Ilya

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