Restrictions for WS Endpoints 

If a session bean is the endpoint of a Web service, the session bean must include a remote interface. Only methods of this interface can be exposed as WS operations. The following types are not allowed anywhere in the endpoint of a Web service:

·        Remote objects (EJBs)

·        Classes extending into another class and implementing an interface

·        Hashed table-like types

·        Classes/objects that cannot be serialized

Interfaces and abstract classes that occur anywhere in an endpoint are allowed only if at least one extending class for runtime behavior is specified. For more information, refer to the section Maintaining SOAP Extensions.

Constructor methods with parameters are not included in the virtual interface of a Web service.

If you are using a session EJBs, you should use a constructor method without parameters and you should depict everything else through business methods. This applies particularly when entity beans are wrapped by session beans.

 

Supported Types in WS Endpoints

The following types from java*.packages are supported in endpoints of Web Services:

Simple Types Wrappers	java.lang.Void java.lang.Boolean java.lang.Byte java.lang.Short java.lang.Integer java.lang.Long java.lang.Float java.lang.Double java.lang.String
Marker Interfaces	java.io.Serializable java.lang.Cloneable java.lang.Comparable
Array classes	java.util.ArrayList java.util.HashSet java.util.LinkedList java.util.List java.util.Stack java.util.Vector
Date/Time	java.util.Calendar java.util.Date java.util.GregorianCalendar java.sql.Date java.sql.Time
Long numbers	java.math.BigInteger java.math.BigDecimal
Exception	java.lang.Throwable java.lang.Exception java.rmi.RemoteException
Object	java.lang.Object