src/persistence/org/codehaus/groovy/grails/validation/HibernateDomainClassValidator.java

   1 /* Copyright 2004-2005 Graeme Rocher
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at
   6  *
   7  *      http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 package org.codehaus.groovy.grails.validation;
  16
  17 import org.springframework.validation.Errors;
  18 import org.springframework.beans.BeanWrapper;
  19 import org.codehaus.groovy.grails.commons.GrailsDomainClassProperty;
  20 import org.hibernate.collection.PersistentCollection;
  21
  22 /**
  23  * A validator that first checks if the Hibernate PersistentCollection instance has been initialised before bothering
  24  * to cascade
  25  *
  26  * @author Graeme Rocher
  27  * @since 0.5
  28  *
  29  *        <p/>
  30  *        Created: Apr 13, 2007
  31  *        Time: 6:32:08 PM
  32  */
  33 public class HibernateDomainClassValidator extends GrailsDomainClassValidator {
  34
  35     /**
  36      * Overrides the default behaviour and first checks if a PersistentCollection instance has been initialised using the
  37      * wasInitialised() method before cascading
  38      *
  39      * @param errors The Spring Errors instance
  40      * @param bean The BeanWrapper for the bean
  41      * @param persistentProperty The GrailsDomainClassProperty instance
  42      * @param propertyName The name of the property
  43      *
  44      * @see org.hibernate.collection.PersistentCollection#wasInitialized()
  45      */
  46     protected void cascadeValidationToMany(Errors errors, BeanWrapper bean, GrailsDomainClassProperty persistentProperty, String propertyName) {
  47         Object collection = bean.getPropertyValue(propertyName);
  48         if(collection != null) {
  49             if(collection instanceof PersistentCollection) {
  50                 PersistentCollection persistentCollection = (PersistentCollection)collection;
  51                 if(persistentCollection.wasInitialized()) {
  52                     super.cascadeValidationToMany(errors, bean, persistentProperty, propertyName);
  53                 }
  54             }
  55             else {
  56                 super.cascadeValidationToMany(errors, bean, persistentProperty, propertyName);
  57             }
  58
  59         }
  60
  61     }
  62 }