[castor-user] Base class/derived class issue

[Kelvin Yip]

Hi

I am using fpml version 4.3 schema and it has a base class reference Product in 
it like this: <xsd:element ref="product" />
Product is actually a base class and it is generated properly using Castor 
source code generation. The derived class could be swap, fra....., I checked 
the classes and descriptors and the classes look correct. However, when I give 
it an xml file, the validation fails and says

org.exolab.castor.xml.MarshalException: The following exception occured while 
validating field: _trade of class: com.calypso.casto
r.SD.fpml43.RequestTradeConfirmation: The field '_product' (whose xml name is 
'product') is a required field of class 'com.
.castor.SD.fpml43.Trade{File: [not available]; line: 112; column: 8}

It looks like the code is correct but the validation does not know how to 
interpret product and treat <product> as a real tag rather than a base class 
which can have subclass values during run time.


Any idea how I can solve this problem ? I turned off the validation but product 
will be null.




Schema below********************************************





<xsd:complexType name="Trade">
    <xsd:annotation>
      <xsd:documentation xml:lang="en">A type defining an FpML 
trade.</xsd:documentation>
    </xsd:annotation>
    <xsd:sequence>
      <xsd:element name="tradeHeader" type="TradeHeader">
        <xsd:annotation>
          <xsd:documentation xml:lang="en">The information on the trade which 
is not product specific, e.g. trade date.</xsd:documentation>
        </xsd:annotation>
      </xsd:element>
      <xsd:element ref="product" />
      <xsd:element name="otherPartyPayment" type="Payment" minOccurs="0" 
maxOccurs="unbounded">
        <xsd:annotation>
          <xsd:documentation xml:lang="en">Other fees or additional payments 
associated with the trade, e.g. broker commissions, where one or more of the 
parties involved are not principal parties involved in the 
trade.</xsd:documentation>
        </xsd:annotation>
      </xsd:element>
      <xsd:element name="brokerPartyReference" type="PartyReference" 
minOccurs="0" maxOccurs="unbounded">
        <xsd:annotation>
          <xsd:documentation xml:lang="en">Identifies that party (or parties) 
that brokered this trade.</xsd:documentation>
        </xsd:annotation>
      </xsd:element>