Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package constraints; import constraints.FieldMatch; import org.apache.commons.beanutils.BeanUtils; import javax.validation.ConstraintValidator; import javax.validation.ConstraintValidatorContext; /** * * @author sergio */ public class FieldMatchValidator implements ConstraintValidator<FieldMatch, Object> { private String firstFieldName; private String secondFieldName; @Override public void initialize(final FieldMatch constraintAnnotation) { firstFieldName = constraintAnnotation.first(); secondFieldName = constraintAnnotation.second(); } @Override public boolean isValid(final Object value, final ConstraintValidatorContext context) { try { final Object firstObj = BeanUtils.getProperty(value, firstFieldName); final Object secondObj = BeanUtils.getProperty(value, secondFieldName); return firstObj == null && secondObj == null || firstObj != null && firstObj.equals(secondObj); } catch (final Exception ignore) { // ignore } return true; } }