[Simple-support] How to parse an xml element with a provided default value from xsd?

[Alexander P. <ale...@er...>]

Hi

I have an xml-schema (my.xsd) and an xml document (my.xml), as shown below. I have made two classes (Element.java and Elements.java also shown below) to parse the xml-document.

When doing the following, everything works as expected:
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        public static void main(String[] args) throws Throwable {
            Serializer serializer = new Persister();
            Elements elements = serializer.read(Elements.class, new File("my.xml"));
            Element element = elements.getElementByName("propB");
            System.out.println(element.getValue());
        }
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And "BBB" is printed on the console. However, if I remove the following from my.xml file "value="BBB"" and run the same code I would expect the default value (as defined in my.xsd) to be returned. But instead I get "null". What am I doing wrong? How do I return the default value ("CCC" in this case)?

I'm quite new to XML, so it is possible that I have missed the concept of xml-schemas...

Regards,
Alex

my.xml
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<?xml version="1.0" encoding="UTF-8"?>
<elements
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:noNamespaceSchemaLocation="my.xsd">

        <element name="propA" value="AAA" />
        <element name="propB" value="BBB" />
</elements>
==========================================

my.xsd
==========================================
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

<xs:complexType name="elementType">
  <xs:attribute name="name" type="xs:string" use="required" />
  <xs:attribute name="value" type="xs:string"  default="CCC" />
</xs:complexType>

<xs:element name="elements">
  <xs:complexType>
    <xs:sequence>
      <xs:element name="element" type="elementType" maxOccurs="unbounded"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>

</xs:schema>
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Elements.java
==========================================
package simple;

import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.ElementList;
import org.simpleframework.xml.Root;
import org.simpleframework.xml.util.Dictionary;

@Root(name="elements")
public class Elements {
        @Attribute(name="noNamespaceSchemaLocation") private String noNamespaceSchemaLocation;

        @ElementList(entry = "element", inline = true)
        private Dictionary<Element> elements = new Dictionary<Element>();

        public Elements(@ElementList(entry = "element", inline = true) Dictionary<Element> resources) {
                this.elements = resources;
        }

        public Element getElementByName(String name){
                return elements.get(name);
        }
}
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Element.java
package simple;

import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Root;
import org.simpleframework.xml.util.Entry;

@Root
public class Element implements Entry{
    @Attribute(name="name") private String name;
    @Attribute(name="value", required=false) private String value;

    public Element(@Attribute(name="name") String name, @Attribute(name="value", required=false) String value) {
        this.name = name;
        this.value = value;
    }

    public String getName() {
        return name;
    }

    public String getValue() {
        return value;
    }
}
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