Cant we use a Set or collection as a return type in GAE?

In my code i have used Set<Employees> as a return type to my function addEmp().

So, i m gettin an Compilation error. The Error is:

Compiling module com.employeedepartmentgae.Employeedepartmentgae
   Refreshing module from source
      Validating newly compiled units
         Removing units with errors
            [ERROR] Errors in 'file:/home/wissen18/employeedepartmentgae/src/com/employeedepartmentgae/client/GreetingServiceAsync.java'
               [ERROR] Line 6: The import com.employeedepartmentgae.server.domainobject.Employee cannot be resolved
               [ERROR] Line 18: Employee cannot be resolved to a type
            [ERROR] Errors in 'file:/home/wissen18/employeedepartmentgae/src/com/employeedepartmentgae/client/GreetingService.java'
               [ERROR] Line 6: The import com.employeedepartmentgae.server.domainobject.Employee cannot be resolved
               [ERROR] Line 20: Employee cannot be resolved to a type
            [ERROR] Errors in 'file:/home/wissen18/employeedepartmentgae/src/com/employeedepartmentgae/client/EmployeeWidget.java'
               [ERROR] Line 12: The import com.employeedepartmentgae.server.domainobject.Employee cannot be resolved
               [ERROR] Line 75: The method addEmp(String, String, String, AsyncCallback>) from the type GreetingServiceAsync refers to the missing type Employee
               [ERROR] Line 75: The type new AsyncCallback>(){} must implement the inherited abstract method AsyncCallback>.onSuccess(Set)
               [ERROR] Line 75: Employee cannot be resolved to a type
               [ERROR] Line 94: The method onSuccess(Set) of type new AsyncCallback>(){} must override or implement a supertype method
               [ERROR] Line 94: Employee cannot be resolved to a type
               [ERROR] Line 96: Employee cannot be resolved to a type
               [ERROR] Line 96: Employee cannot be resolved to a type
               [ERROR] Line 98: Employee cannot be resolved to a type
         Removing invalidated units
            [WARN] Compilation unit 'file:/home/wissen18/employeedepartmentgae/src/com/employeedepartmentgae/client/Employeedepartmentgae.java' is removed due to invalid reference(s):
               [WARN] file:/home/wissen18/employeedepartmentgae/src/com/employeedepartmentgae/client/EmployeeWidget.java
            [WARN] Compilation unit 'file:/home/wissen18/employeedepartmentgae/src/com/employeedepartmentgae/client/DepartmentWidget.java' is removed due to invalid reference(s):
               [WARN] file:/home/wissen18/employeedepartmentgae/src/com/employeedepartmentgae/client/GreetingService.java
               [WARN] file:/home/wissen18/employeedepartmentgae/src/com/employeedepartmentgae/client/GreetingServiceAsync.java
   Computing all possible rebind results for 'com.employeedepartmentgae.client.Employeedepartmentgae'
      Rebinding com.employeedepartmentgae.client.Employeedepartmentgae
         Checking rule 
            [ERROR] Unable to find type 'com.employeedepartmentgae.client.Employeedepartmentgae'
               [ERROR] Hint: Previous compiler errors may have made this type unavailable
               [ERROR] Hint: Check the inheritance chain from your module; it may not be inheriting a required module or a module may not be adding its source path entries properly

So please help me.....

Actually it looks like the problem is with the `Employee` class, not the implementation of `AsyncCallback` because the error messages say "Employee cannot be resolved to a type" -- can we see the Employee class to know what the problem is?

Jason Hall 2010-04-26 04:10:08

@Jason Hall He is calling AsyncCallback inside his Employee class. It is badly implemented on his part and will not allow Employee to compile.

Romain Hippeau 2010-04-26 11:23:39

@Romain I believe you, but there may be other problems too. It would be very helpful to see some code *hint! hint!*

Jason Hall 2010-04-26 12:08:59

@Jason Hall I agree some code would be good.

Romain Hippeau 2010-04-26 12:16:26

ansaurus

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Cant we use a Set or collection as a return type in GAE?

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