cdmlib-model/src/main/java/eu/etaxonomy/cdm/validation/constraint/NullOrNotEmptyValidator.java

   1 /**
   2 * Copyright (C) 2009 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9
  10 package eu.etaxonomy.cdm.validation.constraint;
  11
  12 import javax.validation.ConstraintValidator;
  13 import javax.validation.ConstraintValidatorContext;
  14
  15 import eu.etaxonomy.cdm.validation.annotation.NullOrNotEmpty;
  16
  17 public class NullOrNotEmptyValidator implements
  18                 ConstraintValidator<NullOrNotEmpty, String> {
  19
  20         public void initialize(NullOrNotEmpty nullOrNotEmpty) { }
  21
  22         public boolean isValid(String string, ConstraintValidatorContext constraintContext) {
  23                 boolean isValid = false;
  24                 if(string == null) {
  25                         isValid = true;
  26                 } else if(string.trim().length() > 0) {
  27                         isValid =  true;
  28                 }
  29
  30                 return isValid;
  31         }
  32 }