odk/examples/DevelopersGuide/Forms/ControlValidator.java

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   9  * $RCSfile: ControlValidator.java,v $
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  30
  31 /** base class for components validating the content of form controls
  32  *
  33  * @author  fs@openoffice.org
  34  */
  35 public abstract class ControlValidator implements com.sun.star.form.validation.XValidator
  36 {
  37
  38     /** Creates a new instance of ControlValidator */
  39     public ControlValidator()
  40     {
  41     }
  42
  43     public void addValidityConstraintListener(com.sun.star.form.validation.XValidityConstraintListener xValidityConstraintListener)
  44     {
  45     }
  46
  47     public void removeValidityConstraintListener(com.sun.star.form.validation.XValidityConstraintListener xValidityConstraintListener)
  48     {
  49     }
  50
  51     protected boolean isVoid( Object Value )
  52     {
  53         try
  54         {
  55             return ( com.sun.star.uno.AnyConverter.getType(Value).getTypeClass()
  56                      == com.sun.star.uno.TypeClass.VOID );
  57         }
  58         catch( java.lang.ClassCastException e )
  59         {
  60         }
  61         return false;
  62     }
  63 }