Here is the source code for the .NET Web Service as described in the previous blog. 
Save the following code into a file named SimpleAsmxService.asmx and place it in C:\Inetpub\wwwroot for IIS to use.




<%@WebService Language="C#" Class="MyService.Simple.SimpleAsmxService" %> 

  
using System.Web.Services; 
using System.Collections.Generic; 
using System.Xml.Serialization; 
        
namespace MyService.Simple 
{ 
    [WebService( Namespace = "urn:emp:service" )] 
    public class SimpleAsmxService : WebService 
    { 
        [WebMethod] 
        public Person GetPerson( Person person ) 
        { 
            Person newPerson = new Person(); 
        
            CreatePerson( person, newPerson ); 
        
            return ( newPerson ); 
        } 
        
        [WebMethod] 
        public List<Address> GetAddressList() 
        { 
            List<Address> addressList = new List<Address>(); 
        
            HomeAddress home = new HomeAddress(); 
            home.HouseNumber = "211 Pine Street"; 
        
            addressList.Add( home ); 
        
            return ( addressList ); 
        } 
        
        [WebMethod] 
        public List<HomeAddress> GetHomeAddress() 
        { 
            List<HomeAddress> addressList = new List<HomeAddress>(); 
        
            WorkAddress work = new WorkAddress(); 
            work.HouseNumber = "234 State Avenue"; 
            work.PhoneNumber = "555-1212"; 
        
            addressList.Add( work ); 
        
            return ( addressList ); 
        } 
        
        //[WebMethod] 
        //public List<WorkAddress> GetMatchingTypes() 
        //{ 
        //    List<WorkAddress> addressList = new List<WorkAddress>(); 
        
        //    WorkAddress work = new WorkAddress(); 
        //    work.HouseNumber = "234 State Avenue"; 
        //    work.PhoneNumber = "555-1212"; 
        
        //    addressList.Add( work ); 
        
        //    return ( addressList ); 
        //} 
 

        /// <summary> 
        /// 
        /// </summary> 
        /// <param name="oldPerson"></param> 
        /// <param name="newPerson"></param> 
        private void CreatePerson( Person oldPerson, Person newPerson ) 
        { 
            Address address; 
        
            if ( oldPerson.Address is WorkAddress ) 
                address = new WorkAddress(); 
            else 
                address = new HomeAddress(); 
        
            newPerson.Name = oldPerson.Name; 
            newPerson.Address = address; 
        
            if ( oldPerson.Address != null ) 
            { 
                if ( oldPerson.Address is HomeAddress ) 
                { 
                    ( newPerson.Address as HomeAddress ).HouseNumber = 
                        ( oldPerson.Address as HomeAddress ).HouseNumber; 
        
                    if ( oldPerson.Address is WorkAddress ) 
                    { 
                        ( newPerson.Address as WorkAddress ).PhoneNumber = 
                            ( oldPerson.Address as WorkAddress ).PhoneNumber; 
                    } 
                } 
                else 
                { 
                    ( newPerson.Address as HomeAddress ).HouseNumber = 
                        "Service Receive object type of: " + oldPerson.Address.GetType().Name; 
                } 
            } 
            else 
            { 
                ( newPerson.Address as HomeAddress ).HouseNumber = "987654 ELM STREET"; 
            } 
        } 
    } 
        
    /// <summary> 
    /// 
    /// </summary> 
    [XmlRoot( Namespace = "urn:emp:data" )] 
    public class Person 
    { 
        public string Name; 
        public Address Address; 
    } 
        
    /// <summary> 
    /// 
    /// </summary> 
    [XmlRoot( Namespace = "urn:emp:data" )] 
    [XmlInclude( typeof( HomeAddress ) )] 
    [XmlInclude( typeof( WorkAddress ) )] 
    public abstract class Address 
    { 
    } 
        
    /// <summary> 
    /// 
    /// </summary> 
    [XmlRoot( Namespace = "urn:emp:data" )] 
    [XmlInclude( typeof( WorkAddress ) )] 
    public class HomeAddress : Address 
    { 
        public string HouseNumber; 
    } 
        
    /// <summary> 
    /// 
    /// </summary> 
    [XmlRoot( Namespace = "urn:emp:data" )] 
    public class WorkAddress : HomeAddress 
    { 
        public string PhoneNumber; 
    } 
}

Here is the source code for the Java client using Axis.





/** 
 * 
 */ 
import service.emp.*; 
import data.emp.*; 
  
/** 
 * @author 
 * 
 */ 
public class SimpleAsmxAxisClient 
{ 
  
    /** 
     * @param args 
     */ 
    public static void main(String[] args) 
    { 
        GetPerson(); 
        GetAddress(); 
        GetWorkAddress(); 
    } 
    
    /** 
     * 
     */ 
    public static void GetPerson() 
    { 
        Person person; 
        Person newPerson; 
  
        try 
        { 
            // Create Proxy Class 
            SimpleAsmxServiceSoapProxy service = new SimpleAsmxServiceSoapProxy(); 
            
            // Create Person 
            person = new Person(); 
            person.setName( "Bob the Builder" ); 
  
            // 
            // DO NOT SEND THE ADDRESS 
            // 
            System.out.println( "\nDo NOT send Address to Service..." ); 
            newPerson = service.getPerson( person ); 
            Print( newPerson ); 
            
            // 
            // SEND THE ADDRESS 
            // 
            System.out.println( "\nSend Address to Service..." ); 
            HomeAddress homeAddress = new HomeAddress(); 
            homeAddress.setHouseNumber("456 Long and Winding Road "); 
            person.setAddress(homeAddress); 
            
            newPerson = service.getPerson( person ); 
            Print( newPerson ); 
        } 
        catch ( Exception ex ) 
        { 
            System.err.println(ex); 
        } 
    }

    /** 
     * @param newPerson 
     */ 
    public static void Print( Person newPerson ) 
    { 
        Object o; 
        
        if ( newPerson != null ) 
        { 
            System.out.println( "    Name: " + newPerson.getName() ); 
            
            o = newPerson.getAddress(); 
            if ( o != null) 
            { 
                System.out.println( "    Addr: " + ( (HomeAddress)newPerson.getAddress() ).getHouseNumber() ); 
            } 
            else 
            { 
                System.out.println( "    Addr: is null"  ); 
            } 
        } 
    } 
    
    /** 
     * 
     */ 
    public static void GetAddress() 
    { 
        try 
        { 
            Address[] listOfAddress; 
            
            // Create Proxy Class 
            SimpleAsmxServiceSoapProxy service = new SimpleAsmxServiceSoapProxy(); 
            listOfAddress = service.getAddressList(); 
            
            System.out.println( "\nStarting GetAddress()..." ); 
            Print( listOfAddress ); 
        } 
        catch ( Exception ex ) 
        { 
            System.err.println(ex); 
        }    
    } 
    
    /** 
     * 
     */ 
    public static void GetWorkAddress() 
    { 
        try 
        { 
            HomeAddress[] listOfAddress; 
            
            // Create Proxy Class 
            SimpleAsmxServiceSoapProxy service = new SimpleAsmxServiceSoapProxy(); 
            listOfAddress = service.getHomeAddress(); 
            
            System.out.println( "\nStarting GetWorkAddress()..." ); 
            Print( listOfAddress ); 
        } 
        catch ( Exception ex ) 
        { 
            System.err.println(ex); 
        }    
    } 
  
    /** 
     * @param newPerson 
     */ 
    public static void Print( Address[] listOfAddress ) 
    { 
        if (( listOfAddress != null ) && ( listOfAddress.length > 0)) 
        { 
            for ( int index = 0; index < listOfAddress.length; index++) 
            { 
                System.out.println( "    House Number: " + 
                    ((HomeAddress)listOfAddress[index]).getHouseNumber() ); 
                
                if ( listOfAddress[index] instanceof WorkAddress ) 
                { 
                    System.out.println( "    Phone Number: " + 
                        ((WorkAddress)listOfAddress[index]).getPhoneNumber() ); 
                } 
            } 
        } 
    } 
} 

Here is the source code for the Java client using XFire.





/** 
 * 
 */ 
import java.util.List; 
import emp.service.*; 
import emp.data.*; 
  
/** 
 * @author delliott 
 * 
 */ 
public class SimpleAsmxXFireClient 
{ 
  
    /** 
     * @param args 
     */ 
    public static void main(String[] args) 
    { 
        GetPerson(); 
        GetAddress(); 
        GetWorkAddress(); 
    } 
    
    /** 
     * 
     */ 
    public static void GetPerson() 
    { 
        Person person; 
        Person newPerson; 
  
        try 
        { 
            // Create Proxy Class 
            SimpleAsmxServiceClient service = new SimpleAsmxServiceClient(); 
            
            // Create Person 
            person = new Person(); 
            person.setName( "Bob the Builder" ); 
  
            // 
            // DO NOT SEND THE ADDRESS 
            // 
            System.out.println( "\nDo NOT send Address to Service..." ); 
            newPerson = service.getSimpleAsmxServiceSoap().getPerson( person ); 
            Print( newPerson ); 
            
            // 
            // SEND THE ADDRESS 
            // 
            System.out.println( "\nSend Address to Service..." ); 
            HomeAddress homeAddress = new HomeAddress(); 
            homeAddress.setHouseNumber("456 Long and Winding Road "); 
            person.setAddress(homeAddress); 
            
            newPerson = service.getSimpleAsmxServiceSoap().getPerson( person ); 
            Print( newPerson ); 
        } 
        catch ( Exception ex ) 
        { 
            System.err.println(ex); 
        } 
    } 


  
    /** 
     * @param newPerson 
     */ 
    public static void Print( Person newPerson ) 
    { 
        Object o; 
        
        if ( newPerson != null ) 
        { 
            System.out.println( "    Name: " + newPerson.getName() ); 
            
            o = newPerson.getAddress(); 
            if ( o != null) 
            { 
                System.out.println( "    Addr: " + ( (HomeAddress)newPerson.getAddress() ).getHouseNumber() ); 
            } 
            else 
            { 
                System.out.println( "    Addr: is null"  ); 
            } 
        } 
    }

   
    /** 
     * 
     */ 
    public static void GetAddress() 
    { 
        try 
        { 
            ArrayOfAddress listOfAddress; 
            
            // Create Proxy Class 
            SimpleAsmxServiceClient service = new SimpleAsmxServiceClient(); 
            listOfAddress = service.getSimpleAsmxServiceSoap().getAddressList(); 
            
            System.out.println( "\nStarting GetAddress()..." ); 
            Print( listOfAddress ); 
        } 
        catch ( Exception ex ) 
        { 
            System.err.println(ex); 
        }    
    } 
    
  
    /** 
     * @param listOfAddress 
     */ 
    public static void Print( ArrayOfAddress listOfAddress ) 
    { 
        if ( listOfAddress != null ) 
        { 
            List<Address> addressList = listOfAddress.getAddress(); 
            
            for ( int index = 0; index < addressList.size(); index++) 
            { 
                System.out.println( "    House Number: " + 
                    ((HomeAddress)addressList.get( index ) ).getHouseNumber() ); 
            } 
        } 
    } 
  
    
    /** 
     * 
     */ 
    public static void GetWorkAddress() 
    { 
        try 
        { 
            ArrayOfHomeAddress listOfAddress; 
            
            // Create Proxy Class 
            SimpleAsmxServiceClient service = new SimpleAsmxServiceClient(); 
            listOfAddress = service.getSimpleAsmxServiceSoap().getHomeAddress(); 
            
            System.out.println( "\nStarting GetWorkAddress()..." ); 
            Print( listOfAddress ); 
        } 
        catch ( Exception ex ) 
        { 
            System.err.println(ex); 
        }    
    } 
    
    /** 
     * @param listOfAddress 
     */ 
    public static void Print( ArrayOfHomeAddress listOfAddress ) 
    { 
        HomeAddress address; 
        
        if ( listOfAddress != null ) 
        { 
            List<HomeAddress> addressList = listOfAddress.getHomeAddress(); 
            
            for ( int index = 0; index < addressList.size(); index++) 
            { 
                address = addressList.get( index ); 
                
                    System.out.println( "    House Number: " + 
                        ((WorkAddress)address).getHouseNumber() ); 
                    System.out.println( "    Phone Number: " + 
                        ((WorkAddress)address).getPhoneNumber() ); 
            } 
        } 
    }    
}

SimpleAsmxClient
  
  
Test 1:  
Step 1: Run Java Client 
  
Results: 3 of the 4 Prints are successful 
  
Send Address to Service... 
  
System.Web.Services.Protocols.SoapException: Server was unable to read request. ---> 
System.InvalidOperationException: There is an error in XML document (1, 337). ---> 
System.InvalidOperationException: 
The specified type is abstract: name='Address', namespace='urn:emp:data', at 
<Address xmlns='urn:emp:data'>. 
  
Test 2: 
Step 1: Modify Person.java 
Change all instance of 
data.emp.Address 
To 
data.emp.HomeAddress 
  
Step 2: Run Java Client 
  
Results: 4 of the 4 Prints are successful 
  
  
  
  

SimpleAsmxXFireClient
  
  
Test 1:  
Step 1: Run Java Client 
  
Results: 3 of the 4 Prints are successful 
   
            Starting GetWorkAddress()... 
            java.lang.ClassCastException: emp.data.HomeAddress 
  
  
Test 2: 
   
Step 1: Modify SimpleAsmxService.asmx 
Change 
[WebMethod] 
public List<HomeAddress> GetHomeAddress() 
To 
// [WebMethod] 
public List<HomeAddress> GetHomeAddress() 
  
Step 2: Rebuild Java Proxy Classes 
  
Step 3: Comment out code in Java Client 
GetWorkAddress(); 
  
public static void GetWorkAddress() 
{ 
... 
} 
  
public static void Print( ArrayOfHomeAddress listOfAddress ) 
{ 
... 
} 
  
Step 4: Run Java Client 
  
Results: 2 of the 3 Prints are successful 
public static void GetAddress() fails to retrieve data 
  
org.codehaus.xfire.XFireRuntimeException: Could not invoke service.. 
Nested exception is org.codehaus.xfire.fault.XFireFault: Could not unmarshall type. 
  
Test 3: 
Step 1: Restore original files 
·         SimpleAsmxService.asmx 
·         SimpleAsmxXFireClient.java 
  
Step 2: Modify SimpleAsmxService.asmx 
Uncomment the following method 
  
[WebMethod] 
public List<WorkAddress> GetMatchingTypes() 
{ 
... 
} 
   
  
Step 3: Rebuild Java Proxy Classes 
  
Step 4: Run Java Client 
  
Results: 4 of the 4 Prints are successful