How to force Jaxb to use restriction types - jaxb

Question

for the following mapping
<xs:complexType name="ParentNode">
<xs:sequence>
<xs:element name="child" type="ChildNode"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="ParentNodeRestriction">
<xs:complexContent>
<xs:restriction base="ParentNode">
<xs:sequence>
<xs:element name="child" type="ChildNodeRestriction"/>
</xs:sequence>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
Jaxb generates the following classes (approximately)
public class ParentNode {
protected ChildNode child;
}
public class ParentNodeRestriction
extends ParentNode
{
}
public class ChildNode {
}
public class ChildNodeRestriction
extends ChildNode
{
}
Knowing that ParentNode is not used elsewhere than ParentNodeRestriction, is it possible to force JAXB to generate the following class (hopefully without modifying the mapping):
public class ParentNodeRestriction
{
protected ChildNodeRestriction child;
}
i.e. I need to have the most precise type for the child field.
ps : I am using jaxb2-maven-plugin version 2.2 with maven
Thank you

Answer 1

Using the xjb directive <xjc:treatRestrictionLikeNewType/> (as indicated by his name) generates classes for restrictions which do not inherit from the class corresponding to the parent mapping.
This solves the problem.
There seems to be a slight annoying consequence : elements with maxOccurs="0" are generated despite the <xjc:simple/> directive.
In fact, elements with maxOccurs="0" can be removed from the restriction definition.