From: jviswana <jviswana_at_linux.vnet.ibm.com>
Date: Wed, 23 Nov 2011 19:49:03 +0530

On 23/11/2011 18:26, jviswana wrote:
> Hello,
>
> JAXB is not getting bound to getter/setter property of a Java bean if
> it is Overridden at method level . This is being observed under the
> following scenarios:Override behavioral conflict
>
> _*Scenario 1:*_
>
> -> The variable "name" in base class is getting bound twice and
> breaking the XML schema's "Unique Particle Attribution constraint(2)
> , throwing the following exception while executing xjc.
>
> [ERROR] cos-nonambig: name and name (or elements from their
> substitution group) violate "Unique Particle Attribution". During
> validation against this
> schema, ambiguity would be created for those two particles.
> line 6 of file:/E:/OpenJDK/PMR/mytrial/schema1.xsd ]
>
> Here's the snapshot of the schema being used:
> _*snapshot of schema*_
> <xs:complexType name="*usAddress*">
> <xs:complexContent>
> <xs:extension base="address">
> <xs:sequence>
> <xs:element name="*name*" type="xs:string" minOccurs="0"/>
> <xs:element name="state" type="usState" minOccurs="0"/>
> <xs:element name="zip" type="xs:integer" minOccurs="0"/>
>
> <xs:complexType name="*address*">
> <xs:complexContent>
> <xs:extension base="exception">
> <xs:sequence>
> <xs:element name="*name*" type="xs:string" minOccurs="0"/>
> <xs:element name="city" type="xs:string" minOccurs="0"/>
> <xs:element name="street" type="xs:string" minOccurs="0"/>
>
>
> _*Scenario 2*_
> I see that we are missing Variable "message" derived from "Throwable"
> class . It doesn't appear in the derived class until unless the
> varaible is declared public or annotated, for eg: with @XmlElement 1.
> I suspect the reason for this being neither the base class[Throwable]
> nor the derived class[Address] have the "message" variable making us
> to loose the value and break functionality of application .
> Please see "message" string in Address.java
>
> _snapshot of Beans_
> protected String city;
> //change this to public to see message in address of schema
> //derived from thorwable
> //_at_XmlElement
> protected String message;
>
> See that schema is *missing "message *"
>
> _snapshot of schema_
>
> <xs:complexType name="*address*">
> <xs:complexContent>
> <xs:extension base="exception">
> <xs:sequence>
> <xs:element name="name" type="xs:string" minOccurs="0"/>
> <xs:element name="city" type="xs:string" minOccurs="0"/>
> <xs:element name="street" type="xs:string" minOccurs="0"/>
> </xs:sequence>
> </xs:extension>
> </xs:complexContent>
> </xs:complexType>
>
> Which is there if we use *public access/ @XmlElement* this message
> will appear
>
> <xs:complexType name="*address*">
> <xs:complexContent>
> <xs:extension base="exception">
> <xs:sequence>
> <xs:element name="*message*" type="xs:string" minOccurs="0"/>
> <xs:element name="city" type="xs:string" minOccurs="0"/>
> <xs:element name="name" type="xs:string" minOccurs="0"/>
> <xs:element name="street" type="xs:string" minOccurs="0"/>
> </xs:sequence>
> </xs:extension>
> </xs:complexContent>
> </xs:complexType>
>
> The exception stack is not having message,
>
> <xs:complexType name="*exception*">
> <xs:complexContent>
> <xs:extension base="throwable">
> <xs:sequence/>
> </xs:extension>
> </xs:complexContent>
> </xs:complexType>
>
> <xs:complexType name="throwable">
> <xs:sequence>
> <xs:element name="stackTrace" type="stackTraceElement" nillable="true"
> minOccurs="0" maxOccurs="unbounded"/>
> </xs:sequence>
> </xs:complexType>
>
> <xs:complexType name="stackTraceElement" final="extension restriction">
> <xs:sequence/>
> </xs:complexType>
>
>
> I see that , the getter/setter is not getting bound considering
> method override
> Case 1: misses to see if base class has getter/setter binding
> already
> Case 2: misses to see getter/setter base-derived relation
> totally . Please note that the base class has only getter and derived
> class has both getter/setter .
>
> Isn't it a bug ?
>
> _*Reference *_:
> 1)Javadoc
> I see that we have JAVA API doc as part of
> XmlAccessType.html#PUBLIC_MEMBER
>
> "Every public getter/setter pair and every public field will be
> automatically bound to XML, unless annotated by XmlTransient. Fields
> or getter/setter pairs that are private, protected, or defaulted to
> package-only access are bound to XML only when they are explicitly
> annotated by the appropriate JAXB annotations. "
>
> and
>
> 2) we also have a spec for Unique Particle Attribution constraint
> http://www.w3.org/TR/xmlschema-1/#non-ambig
> for a schema generation
>
> Regards,
> Jayashree V
>