How to say that variable == null if pressed cancel button.

Question

Hi! I have code line in jspx page:
#{viewScope.myParamSusceptibToCrackingKi == null ? SusceptibToCrackingKi.myParamInitialValue : viewScope.myParamSusceptibToCrackingKi}How can I say that myParamSusceptibToCrackingKi == null (nothing) if I press cancel Button in form, or press refresh button in browser?
Best regards, Hope You help, Debuger!

Answer 1

Hi, Timo! To better Understand:
In jspx page I have some inputText fields:
<af:inputText id="CropTypeKiExplain"
                                  value="#{viewScope.myParamCropTypeKi == null ? CropTypeKi.myParamInitialValue : viewScope.myParamCropTypeKi}"
                                  changed="#{changedFlagsMap['CropTypeKiSkaidr']}"
                                  partialTriggers="CropTypeKi" readOnly="true"
                                  contentStyle="color:Gray;"
                                  rendered="#{skaidrojumaApskate.radit != '5'}"/>
       <af:inputText id="VirusDiseaStatKiExplain"
                                  value="#{viewScope.myParamVirusDiseaStatKi == null ? VirusDiseaStatKi.myParamInitialValue : viewScope.myParamVirusDiseaStatKi}"
                                  changed="#{changedFlagsMap['VirusDiseaStatKiSkaidr']}"
                                  partialTriggers="VirusDiseaStatKi"
                                  readOnly="true" contentStyle="color:Gray;"
                                  rendered="#{skaidrojumaApskate.radit != '5'}"/>variables: myParamCropTypeKi and myParamVirusDiseaStatKi have some value. But I want that if I press button in my form, they will be empty. Where to put code?
And what code I need to write to say that? Mabe I can write: #{viewScope.myParamCropTypeKi is null} and #{viewScope.myParamVirusDiseaStatKi is null} . But where?
Best regards, Debuger