RE: Abstract class object in a method parameter

[Sagar Pidaparthi]

Thanks for the response.  I did declare these abstract classes as beans with BeanMapping in WSDD file for this service.   It does cause trouble, even with mappings specified.   I will do some more experiments.  I really don’t want to go and convert all abstract classes to Normal classes.  I have tried this and it does resolve the problem in some cases.   I will report back my findings.   Please respond with any other ideas.   Here is my bean mapping in my WSDD file.               <beanMapping         xmlns:ns="http://businessClasses.pmf.chordiant.com"         qname="ns:Party"         languageSpecificType="java:com.chordiant.pmf.businessClasses.Party"       />   regards   Sagar             -----Original Message----- From: Christophe Roudet [mailto:[EMAIL PROTECTED] Sent: Friday, October 01, 2004 5:50 AM To: [EMAIL PROTECTED] Subject: RE: Abstract class object in a method parameter   Works fine for me (axis1.1, rpc-enc), just declared your derived types in the wsdd.   Christophe   From: Sagar Pidaparthi [mailto:[EMAIL PROTECTED] Sent: Thursday, September 30, 2004 7:30 PM To: [EMAIL PROTECTED] Subject: Abstract class object in a method parameter   Hi,   I am experiencing some problems while instantiating some of the business objects on the server.  This could be because the base classes are abstract and any attempt use these objects in a parameter would require such an object’s instantiation.  In our native code usage such base class objects like Person were obtained from a factory and probably type cast because we were controlling/developing the code.    When axis tries to instantiate a Party, it fails because Party is an abstract class and can not be instantiated.  We may have a problem with abstract classes (at run time),  just as we had problem with interfaces as parameters ( at proxy generation time)  in a method call.   Given below is the call I am trying to make on the client         Vector RETVAL = partyRoleCA.getAllPaymentMethods(userName, authentication, (Party)myPerson);     The Axis server receives the call through a SOAP message and tries to instantiate a Party object and then…..   Given below is the error message received from the server.    faultString: org.xml.sax.SAXException: Unable to create JavaBean of type com.chordiant.pmf.businessClasses.Party.  Missing default constructor?  Error was: java.lang.InstantiationException: com/chordiant/pmf/businessClasses/Party.     Can anybody confirm this observation?  Is there a way around the problem?   Regards   Sagar