Interfaces, impls, de/serialization

Question

WebLogic 5.1
JDK 1.2.2_005
NT 4.0 SP5
Just a quick question about interfaces and implementation classes.
Assuming the following...
- interface IStartup
public String getStartupInfo();
- class StartupAdapter implements IStartup, java.io.Serializable
public String getStartupInfo() {
return "startup info";
- StartBean, stateless session bean
StartBean has a method called getStartup which returns IStartup like so:
public IStartup getStartup() {
return (IStartup) new StartupAdapter();
- client code (java application)
IStartup s = null;
String info = null;
/*session bean lookup/create
s = remote.getStartup();
info = s.getStartupInfo();
...does the client machine have to have StartupAdapter.class in the
classpath?

Answer 1

Argyn is right. I've worked on a remote application and i don't have the
implementation class on the client side. what i have is just the server
interface.
- Sam Jacob
Iconixx Corp.
Argyn Kuketayev <[email protected]> wrote in message
news:[email protected]..
No, you don't necessarily need to have StartupAdapter.class, because itmight
be sent serialized.
all your client need is an interface.
Sam Jacob wrote:
Java is strongly typed. Eventhough y're returning IStartup, behind the
scenes, it's actually an instance of StartupAdapter.
So you need to have the StartupAdapter class in the client's classpath.
Sam Jacob
Iconixx Corp.
Chip Morgan <[email protected]> wrote in message
news:8ilrl0$sga$[email protected]..
WebLogic 5.1
JDK 1.2.2_005
NT 4.0 SP5
Just a quick question about interfaces and implementation classes.
Assuming the following...
- interface IStartup
public String getStartupInfo();
- class StartupAdapter implements IStartup, java.io.Serializable
public String getStartupInfo() {
return "startup info";
- StartBean, stateless session bean
StartBean has a method called getStartup which returns IStartup like
so:
public IStartup getStartup() {
return (IStartup) new StartupAdapter();
- client code (java application)
IStartup s = null;
String info = null;
/*session bean lookup/create
s = remote.getStartup();
info = s.getStartupInfo();
...does the client machine have to have StartupAdapter.class in the
classpath?