I am having difficulty understanding the question. The javadoc is simply documentation for your java class files. It gives you an idea of the overall package that you are using. You cannot call a javadoc programmatically.
what i can understand that the user wants to call the methods of the Java API, that present at the server. If i am right, then the solution is so simple. You can directly call the methods by the name with the help of RMI or you can map the methods with the help of JNDI and the call it as RPC.