Calling a Action class which doesnt have a Perform() or Execute() method.

[Shan Krish]

Hi All ,

I have all my appliaction written in User defined Struts framework. I have my userdefined struts-config file calling a Action class below (whole code),

 

<action path="/batchInstructionDetail"
			type="com.xxx.xxx.actions.BatchChildDetailAction"
			name="inquiryForm"
			scope="request"
			verifyEntitle="true"
			namespace="batch">
</action>


import com.xxx.xxx.model.ActionModel;
import com.xxx.xxx.model.InputFilteringResult;
import com.xxx.xxx.model.PageValues;
import com.xxx.xxx.model.UserModel;
import com.xxx.xxx.services.IInputFiltering;
import com.xxx.xxx.services.ServiceFactory;

public class BatchChildDetailAction extends BatchTypeDetailAction
{
  public void setFormAction(PageValues pageValues)
  {
    pageValues.putField("formAction", "/saveBatchChild");
  }

  protected InputFilteringResult getInputFilter(String product, String type, String function, String action, UserModel user, PageValues pageValues)
  {
    String childGridType = pageValues.getFieldLocal("_childGridType");
    ActionModel actionModel = new ActionModel(product, function, childGridType, action, "");

    IInputFiltering iF = ServiceFactory.getInputFilteringService();
    return iF.resolveWorkflowInputFiltering(user, actionModel);
  }

  protected void setPageValuesLocal(PageValues pageValues)
  {
  }

  protected String getInvalidDataModelPage()
  {
    return "/batchChildDetailError.jsp";
  }
}
 

It calls this class which doesnt have any Perform() or Execute() method and the class extends BatchTypeDetailAction which has Perform() method returns RequestForward . my question is which method from the above BatchChildDetailAction class is called without any instance calling the method & the class dont have Perform() or Execute() method.How my flow goes ???

 

public class BatchTypeDetailAction extends TypeDetailAction
{
  public RequestForward perform(RequestMapping mapping, RequestForm formInstance, ServletRequest request, ServletResponse response)
    throws IOException, ServletException
  {
    PageValues pageValues = initPageValues(request, mapping);

    String check = request.getParameter("checkSavedMode");
    String isDuplicateWarningPopupOpened = request.getParameter("isDuplicateWarningPopupOpened");
    if ((check != null) && (check.equalsIgnoreCase("true") == true))
    {
      String savedMode = pageValues.getFieldLocal("savedMode");
      if ((savedMode != null) && (savedMode.length() > 0))
        pageValues.putField("_mode", savedMode);
    }
    if ((isDuplicateWarningPopupOpened != null) && (isDuplicateWarningPopupOpened.equals("true")))
      return new RequestForward("/instructionInquiry.jsp", false, "success");

    RequestForward forward = super.perform(mapping, formInstance, request, response);

    return forward;
  }

Please revert back for any doubts in my question ...

Thanks Folks.. Expecting a answer.

[Joe Ess]

Welcome to the JavaRanch.

the class dont have Perform() or Execute() method

BatchChildDetailAction inherits the perform method from BatchTypeDetailAction.

[Shan Krish]

Thanks Joe ,

Yes, you are right . But when "BatchChildDetailAction" is intially called , will it automatically looks for the Perform() method in default ?.

And again further BatchTypeDetailAction extends TypeDetailAction extends GetDetailActionBase which contains another Perform() method , so will the hirarchy keeps going to call the upcoming Perform() method with ends in ActionBase class ? or will it stop with the first Perform() and process it ? .


BatchChildDetailAction ---- BatchTypeDetailAction- Perform() ---- TypeDetailAction ---- GetDetailActionBase -Perform() ---- ... ----- .... ----- ... ----- ActionBase -Perform()


These question arises since the code is a userdefined struts framework which even the ActionBase & ControlServlet is.


Thanks
Shan

[Joe Ess]

Struts Actions follow the same rules of inheritance that are true for any Java class. You should have a look at the Java tutorial, in this case, the chapter on Inheritance.
A little reading now will save you a lot of agony in the long run.