[hibernate-issues] [Hibernate-JIRA] Assigned: (HHH-4073) discriminator formula creates problem in hibernate envers

[Adam Warski (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-4073?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adam Warski reassigned HHH-4073:
--------------------------------

    Assignee: Adam Warski

> discriminator formula creates problem in hibernate envers
> ---------------------------------------------------------
>
>                 Key: HHH-4073
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4073
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: envers
>    Affects Versions: 3.3.x
>         Environment: hibernate-3.3.x, envers-1.2.1.ga-hibernate-3.3.jar (Oracle 10g or HSQLDB)
>            Reporter: Saravana Kumar
>            Assignee: Adam Warski
>   Original Estimate: 56h
>  Remaining Estimate: 56h
>
> I map my classes using Single Table per class hierarchy as below
> @Entity
> @DiscriminatorFormula ("(select t.c_type from t_type t where t.c_id = c_type)")
> @Audited
> public class Attribute...{
> ...
> } 
>      or
>       
> <discriminator type="string">
> 	<formula>(select t.c_type from t_type t where t.c_id = c_type)</formula>
> </discriminator>
> When I use envers 
> I get the follwoing error
> Caused by: java.lang.ClassCastException: org.hibernate.mapping.Formula
> at org.hibernate.envers.configuration.metadata.MetadataTools.addColumns(MetadataTools.java:154)
> at org.hibernate.envers.configuration.metadata.AuditMetadataGenerator.generateMappingData(AuditMetadataGenerator.java:263)
> at org.hibernate.envers.configuration.metadata.AuditMetadataGenerator.generateFirstPass(AuditMetadataGenerator.java:345)
> at org.hibernate.envers.configuration.EntitiesConfigurator.configure(EntitiesConfigurator.java:87)
> at org.hibernate.envers.configuration.AuditConfiguration.(AuditConfiguration.java:86)
> at org.hibernate.envers.configuration.AuditConfiguration.getFor(AuditConfiguration.java:99)
> at org.hibernate.envers.event.AuditEventListener.initialize(AuditEventListener.java:260)
> at org.hibernate.event.EventListeners$1.processListener(EventListeners.java:198)
> at org.hibernate.event.EventListeners.processListeners(EventListeners.java:181)
> at org.hibernate.event.EventListeners.initializeListeners(EventListeners.java:194)
> When I tried to debug the problem
> (AuditMetadataGenerator.java:263) has 
> 260:  // Checking if there is a discriminator column
> 261:       if (hasDiscriminator) {
> 262:            Element discriminator_element = class_mapping.addElement("discriminator");
> 263:            MetadataTools.addColumns(discriminator_element, pc.getDiscriminator().getColumnIterator());
> 264:            discriminator_element.addAttribute("type", pc.getDiscriminator().getType().getName());
> 265:        }
> (MetadataTools.java:154) has 
> 152:    public static void addColumns(Element any_mapping, Iterator<Column> columns) {
> 153:        while (columns.hasNext()) {
> 154:            Column column = columns.next();
> 155:            addColumn(any_mapping, column.getName(), column.getLength(), column.getScale(), column.getPrecision(),
> 156:					column.getSqlType());
> 157:        }
> 158:    }
> I see that there is nothing to handle Formula :-(
> Can you investigate?

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