[Web Service in Web Dynpro question] input parameter

Dear All,

i have an idea about below.

i want to call an WS method and the input parameter is an Object type.

so, i can change different input class.

i use a session bean to create WS and create a Model in Web Dynpro .

does anyone have any experience about above idea?

here are my simple code

public class Test implements Serializable;

//in session bean need two method. so the Test class

//which show as ComplexType_Test can be create in Web

//dynpro Model.

//method1:

public String test(Object arg1);

//method2:

public Test businessMethod() ;

but i run executeMethod in web dynpro, i can't run.

does anyone have any idea about it.

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WU WENJR