JAXB schemagen how generate choice for two fields? - jaxb

Question

I have java class:
public class ActivityAddress {
#XmlElement(name = "Elem1", required = false)
private String elem1;
#XmlElement(name = "Elem2", required = false)
private String elem2;
#XmlElement(name = "PostIndex", required = true)
private String postIndex;
}
I want to get schema like this:
<xs:complexType name="ActivityAddress">
<xs:sequence>
<xs:choice minOccurs="0">
<xs:element name="Elem1" type="xs:string"/>
<xs:element name="Elem2" type="xs:string"/>
</xs:choice>
<xs:element name="PostIndex" type="xs:string"/>
</xs:sequence>
So the two fields "Elem1" and "Elem2" must be in choice.
Decision like this:
#XmlElements({
#XmlElement(name = "Elem1", type = String.class, required = false),
#XmlElement(name = "Elem2", type = String.class, required = false)
})
private String elem;
isn't suitable for me, because in java class i need have both fields.
Ноw i can do it? Can anyone please help?

Answer 1

Generating an XML Schema
For the following Java class:
public class ActivityAddress {
#XmlElement(name = "Elem1", required = false)
private String elem1;
#XmlElement(name = "Elem2", required = false)
private String elem2;
#XmlElement(name = "PostIndex", required = true)
private String postIndex;
}
You are going to get an XML Schema like the following, there isn't a way to generate the choice the way you would like.
<xs:sequence>
<xs:element name="Elem1" type="xs:string" mincOccurs="0"/>
<xs:element name="Elem2" type="xs:string" minOccurs="0"/>
<xs:element name="PostIndex" type="xs:string"/>
</xs:sequence>
Pointing to a Hand Crafted XML Schema
You can however generate an XML Schema and then modify it yourself and then tell JAXB to use it. This is done with the package level #XmlSchema annotation.
package-info.java
#XmlSchema(location="http://www.example.com/foo/mySchema.xsd")
package com.example.foo;