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 Post subject: Validation using GroupSequenceProvider not working with JSF
PostPosted: Wed Aug 10, 2016 6:04 am 
Newbie

Joined: Mon Aug 08, 2016 10:48 am
Posts: 1
I'm attempting to use GroupSequenceProvider from hibernate bean validation in a JSF application but the getValidationGroups(T t) method in the assigned group sequence provider always receive a null argument so I can't use the state of the bean undergoing validation to dynamically create a sequence (which is what I was trying to accomplish).

When I submit the form in the example below @NotBlank(groups=TestGroup.class) for input2 will not be validated because that group is only added to the list when the argument of getValidationGroups is not null, which never happens.

Am I missing something? When testing the same setup of Data and TestSequenceProvider in a project with only hibernate-validator initiating the validation explicitly from a main method it works.

I'm using:
hibernate validator 5.2.3
JSF 2.2
Running on WildFly 10.0.0 Final

Example code:

Data.java
Code:
package test;

import java.io.Serializable;

import org.hibernate.validator.constraints.NotBlank;
import org.hibernate.validator.group.GroupSequenceProvider;

@GroupSequenceProvider(TestGroupSequenceProvider.class)
public class Data implements Serializable{
   private static final long serialVersionUID = 1L;

   @NotBlank(message="input1 (no group) validation failed")
   private String input1;
   
   @NotBlank(message="input2 (TestGroup) validation failed", groups=TestGroup.class)
   private String input2;
   
   /* Getters/Setters omitted */
}


TestGroupSequenceProvider.java
Code:
package test;

import java.util.ArrayList;
import java.util.List;

import org.hibernate.validator.spi.group.DefaultGroupSequenceProvider;

public class TestGroupSequenceProvider implements DefaultGroupSequenceProvider<Data> {

   @Override
   public List<Class<?>> getValidationGroups(Data data) {
      List<Class<?>> groupSequence = new ArrayList<>();
      
      groupSequence.add(Data.class);

      if(data != null) {
         groupSequence.add(TestGroup.class);
         System.out.println("TestGroupSequenceProvider.getValidationGroups> Data is NOT null");
      }
      else {
         System.out.println("TestGroupSequenceProvider.getValidationGroups> Data IS null");
      }
      
      return groupSequence;
   }

}


DataView.java
Code:
package test;

import java.io.Serializable;

import javax.faces.view.ViewScoped;
import javax.inject.Named;

@Named
@ViewScoped
public class DataView implements Serializable{
   private static final long serialVersionUID = 1L;
   
   private Data data = new Data();
   
   public void submit() {
      System.out.println("DataView.submit()> Data [input1=\""+data.getInput1()+"\", input2=\""+data.getInput2()+"\"]");

      if(data.getInput2()==null) {
         System.out.println("DataView.submit()> Input2 == null");
      }
   }

   public Data getData() {
      return data;
   }
}


test.xhtml
Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
   xmlns:h="http://xmlns.jcp.org/jsf/html">

<h:body>
   <h:form>
      Input1:
      <h:inputText value="#{dataView.data.input1}" />
      <br/>
      Input2:
      <h:inputText value="#{dataView.data.input2}" />
      <br/>
      <h:commandButton action="#{dataView.submit()}" value="Submit" />
      <br/>
      <h:messages />
   </h:form>
</h:body>
</html>


TestGroup.java
Code:
package test;

public interface TestGroup {

}


Putting any text in input1 (or it will fail validation) and submitting the form by pressing the submit button results in the following printouts to the console:
11:58:35,029 INFO [stdout] (default task-6) TestGroupSequenceProvider.getValidationGroups> Data IS null

11:58:35,030 INFO [stdout] (default task-6) TestGroupSequenceProvider.getValidationGroups> Data IS null

11:58:35,032 INFO [stdout] (default task-6) TestGroupSequenceProvider.getValidationGroups> Data IS null

11:58:35,032 INFO [stdout] (default task-6) TestGroupSequenceProvider.getValidationGroups> Data IS null

11:58:35,034 INFO [stdout] (default task-6) DataView.submit()> Data [input1="asdf", input2="null"]

11:58:35,034 INFO [stdout] (default task-6) DataView.submit()> Input2 == null

So JSF validation stage passes and proceeds to call DataView.submit() because input2 is not validated.


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