odk/examples/DevelopersGuide/Forms/ControlValidator.java

   1 /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 // base class for components validating the content of form controls
  21
  22 public abstract class ControlValidator implements com.sun.star.form.validation.XValidator
  23 {
  24
  25     /** Creates a new instance of ControlValidator */
  26     public ControlValidator()
  27     {
  28     }
  29
  30     public void addValidityConstraintListener(com.sun.star.form.validation.XValidityConstraintListener xValidityConstraintListener)
  31     {
  32     }
  33
  34     public void removeValidityConstraintListener(com.sun.star.form.validation.XValidityConstraintListener xValidityConstraintListener)
  35     {
  36     }
  37
  38     protected boolean isVoid( Object Value )
  39     {
  40         try
  41         {
  42             return ( com.sun.star.uno.AnyConverter.getType(Value).getTypeClass()
  43                      == com.sun.star.uno.TypeClass.VOID );
  44         }
  45         catch( java.lang.ClassCastException e )
  46         {
  47         }
  48         return false;
  49     }
  50 }
  51
  52 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */