13 Replies Latest reply on Mar 2, 2006 12:00 AM by Andrew

    Child object validation

    Andrew Apprentice

      Hibernate validation question. I am trying out using only hibernate validation for my entity beans, so that I don't have to duplication JSF validators when editing the same object on different pages.

      I have my user object with children lists (addresses, emails and phone numbers). In my SB:

      private User user;

      In the User.java:

      @OneToMany(cascade=CascadeType.ALL, mappedBy="user")
       @Size(min=1, message="You must provide at least one email address")
       private List<EmailAddress> emails =
       new ArrayList<EmailAddress>();

      The user validates fine and all properties of user, but if any of my emails are invalid I am getting:
      Caused by: org.jboss.tm.JBossRollbackException: Unable to commit, tx=TransactionImpl:XidImpl[FormatId=257, GlobalId=null:1139797993207/13, BranchQual=null:1139797993207, localId=0:13], status=STATUS_NO_TRANSACTION; - nested throwable: (org.hibernate.validator.InvalidStateException: validation failed for: org.bethanyefree.data.EmailAddress)
       at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:1283)
       at org.jboss.tm.TxManager.commit(TxManager.java:587)
       at org.jboss.ejb3.embedded.UserTransactionImpl.commit(UserTransactionImpl.java:90)
       at org.jboss.seam.jsf.SeamExtendedManagedPersistencePhaseListener.commit(SeamExtendedManagedPersistencePhaseListener.java:77)
       ... 26 more
      Caused by: org.hibernate.validator.InvalidStateException: validation failed for: org.bethanyefree.data.EmailAddress
       at org.hibernate.validator.event.ValidateEventListener.validate(ValidateEventListener.java:104)
       at org.hibernate.validator.event.ValidateEventListener.onPreInsert(ValidateEventListener.java:127)

      How come the @IfInvalid is not catching that child objects of user are invalid?


        • 1. Re: Child object validation
          Gavin King Master

          I'll point Emmanuel this way.

          • 2. Re: Child object validation
            Emmanuel Bernard Master

            Year I noticed that.

            This is probably a 1h30 work test included, if you're willing to contribute :-)

            • 3. Re: Child object validation
              Andrew Apprentice

              I am really busy, but will consider it :-)

              • 4. Re: Child object validation
                Andrew Apprentice

                Okay, I just spent some time looking into the code and found this is not a seam issue, but a hibernate issue. The ClassValidator does not support collections. In both the initialization method as well as the actual validation method, it applies the validation to the field class and the method return class. The short comming is that it doesn't check to see if the field type or property type is a collection.

                So what happens is that the parent object is parsed and the fields. The field type is a List/Set/Map (either generic or not). The class validator validates "List", "Set" and "Map" instead of the objects that the collection contains.

                Proposal Initialize changes:
                * Change the ClassValidator to check for collections.
                * If property/field is a collection, then check the generic type to see what type the collection contains.
                * Recurse through as normal

                Proposal Validate changes:
                * Check for collections when the property/field value is retrieved
                * If a collection, iterate over the members (values for map)
                * validate each item in the collection (TODO: decide the path to the object, should it include some kind of index identifier? This would not work for map though)

                Once this is done for hibernate-annotations, then seam would need an update. The trick would be how to map the validation issues to component IDs. This isn't so easy. The dataTable reders children IDs with the index:


                where 0 is the index. That means to attempt to find the invalid component, the path dataTable would have to have an ID equal to the collection name, then somehow identify the index (would be good if the classvalidator did this) and then try to find the component.

                class User
                List addresses;

                May result in a validation issue with path like:

                The ID's in JSF would be something like:

                Where myForm is the form component id,
                addresses is the ID of the dataTable component
                5 is the index in the collection
                street is the input text component ID with the invalid value

                Gavin, looks like you are the author of the ClassValidator, what impact would this cause on the validator? I think this should be acceptable, if the developer does not want to propagate validation into the collection, they simply should not mark the field/property as "@Valid".

                Without this code, the only way to validate children is to have to hand code a validate method for every property on every entity that has a collection to validate, definately more effort than to incorporate it in the classvalidator.

                I would really like to have this before middle March, and may be willing to help to speed this up (probably by submitting a patch if necessary rather than trying to get CVS all setup).


                • 5. Re: Child object validation
                  Andrew Apprentice

                  HTML got messed up, "addresses" was supposed to be a generic list of type Address in the above example

                  • 6. Re: Child object validation
                    Andrew Apprentice

                    I'm posting the patch to the hibernate-annotations, now just need to patch the seam side so that it can try to find the component (right now all child validation errors end up in the global messages only).


                    • 7. Re: Child object validation
                      Emmanuel Bernard Master

                      Where did you post the validator patch?
                      Can you do it in http://opensource.atlassian.com/projects/hibernate/secure/Dashboard.jspa

                      BTW, I'm the maintainer of Hibernate Validator.

                      Some comments:

                      Do not check the generic type in collection but the actual object type (collection might not be generic) plus sub element might need extra validation compared to superelements

                      Map.Key should also be validated I think

                      For the path, List and Map should get their key parent.children[3] or parent.children["Elder"]. For Set and Collection that does not really make sense, since ordering is not guarantied (I can't remember how OGNL describe navigations in Sets and Collection).

                      • 8. Re: Child object validation
                        Andrew Apprentice

                        I put the patch in the JIRA issue:

                        I used generic collection refection as hibernate annotations are java5, so thought it was a safe assuption.

                        This version is working for me, and I really can't spend more time on it. This version should be okay for now, although maybe not as nice as you may like. I wish I could help, but I am getting dangerously close to breaking my deadline. I need to see if I can get seam to find the component now (tricky since each row is not a separate set of components, but the same ones rendered multiple times).

                        • 9. Re: Child object validation
                          Andrew Apprentice

                          I can see what you mean about the validation of the keys and the index issue. I am mostly thinkin on this from a Seam perspective, where I need to make sense of the path. I begs an interesting question of how to handle complex keys and how to represent what element in invalid in the collection.

                          I know the set iterator and map values iterator will not always produce the correct index. For set, there really is no other choice except maybe the object's id. For Map, the map key would be fine as well in the path. The problem for key and set item ID is that if the objects are complex, then they will not translate into a string path.

                          As I mentioned, I thought this would be a good "initial" release. Hopefully there is enough in the patch to make it easier for you or another hibernate developer to get a good head start to completing the functionality.

                          I am about to finish the patch for seam assuming that this code is not changed drastically.


                          • 10. Re: Child object validation
                            Andrew Apprentice

                            If the hibernate-annotations patch I submitted is incorporated, here is the patch to seam for this fix:

                            Index: ValidationInterceptor.java
                            RCS file: /cvsroot/jboss/jboss-seam/src/main/org/jboss/seam/interceptors/ValidationInterceptor.java,v
                            retrieving revision 1.10
                            diff -r1.10 ValidationInterceptor.java
                            > import java.util.StringTokenizer;
                            > import java.util.regex.Matcher;
                            > import java.util.regex.Pattern;
                            > @SuppressWarnings("unchecked")
                            < String clientId = getClientId( facesContext.getViewRoot(), iv.getPropertyName(), facesContext);
                            > Pattern indexPattern = Pattern.compile("([^\\.]+?)\\[(\\d)\\]");
                            > boolean hasIndexes = false;
                            > UIComponent comp = facesContext.getViewRoot();
                            > StringTokenizer tokens = new StringTokenizer(iv.getPropertyPath(), ".");
                            > boolean first = true;
                            > while (tokens.hasMoreTokens())
                            > {
                            > String property = tokens.nextToken();
                            > Matcher match = indexPattern.matcher(property);
                            > if (match.find())
                            > {
                            > hasIndexes = true;
                            > property = match.group(1);
                            > }
                            > comp = findComponent(comp, property, facesContext);
                            > if (comp == null && first)
                            > {
                            > // if the first wasn't found, don't sweat it, it just means the bean wasn't found
                            > // (Usually the JSF content will not have a component for the bean)
                            > if (tokens.hasMoreTokens())
                            > comp = facesContext.getViewRoot();
                            > else
                            > break;
                            > }
                            > else if (comp == null)
                            > break;
                            > first = false;
                            > }
                            > String clientId = (comp == null) ?
                            > null : comp.getClientId(facesContext);
                            > if (clientId != null && hasIndexes)
                            > {
                            > // apply the indexes
                            > StringBuilder indexedId = new StringBuilder();
                            > Matcher match = indexPattern.matcher(iv.getPropertyPath());
                            > int previousIndex = 0;
                            > while (match.find())
                            > {
                            > String propName = match.group(1);
                            > String index = match.group(2);
                            > int idIndex = clientId.indexOf(":" + propName + ":", previousIndex);
                            > if (idIndex == -1)
                            > {
                            > indexedId = null;
                            > break;
                            > }
                            > indexedId.append(clientId.substring(previousIndex, idIndex + propName.length() + 2));
                            > indexedId.append(index);
                            > indexedId.append(":");
                            > previousIndex = idIndex + propName.length() + 2;
                            > }
                            > if (indexedId != null)
                            > {
                            > indexedId.append(clientId.substring(previousIndex));
                            > clientId = indexedId.toString();
                            > }
                            > }
                            < private static String getClientId(UIComponent component, String id, FacesContext facesContext)
                            > private static UIComponent findComponent(UIComponent parent, String id, FacesContext facesContext)
                            < String componentId = component.getId();
                            > String componentId = parent.getId();
                            < return component.getClientId(facesContext);
                            > return parent;
                            < Iterator iter = component.getFacetsAndChildren();
                            > Iterator iter = parent.getFacetsAndChildren();
                            < String clientId = getClientId(child, id, facesContext);
                            < if (clientId!=null) return clientId;
                            > UIComponent result = findComponent(child, id, facesContext);
                            > if (result != null) return result;

                            • 11. Re: Child object validation
                              Gavin King Master

                              please add it to JIRA, thanks

                              • 12. Re: Child object validation
                                Andrew Apprentice

                                Sorry to be an idiot, do you want me to create a new JBoss-Seam JIRA issue or just attach the seam patch to the hibernate-annotations JIRA that is already open

                                • 13. Re: Child object validation
                                  Andrew Apprentice

                                  I went ahead and added a new JIRA issue as it wouldn't make sense in the hibernate-annotations issue: