Question

I need to know which physical column is associated to a persistent’s attribute.

e.g.

Class LDocLine has this attribute

  private Integer lineNumber;

which is mapped in hibernate like this :

  <property name="lineNumber" column="LINENUMBER" type="integer"/>

The method I need is something like :

getColumn(“LDocLine”,”lineNumber) => “LINENUMBER”

I assume its existence internally, but not sure if it’s in the public api.

Thanks in advance

Answer 1

Do you have access to Configuration object you’ve used to build your session factory? If so, you can use the following:

Value v = configuration.getClassMapping(entityName).getProperty(propertyName).getValue();
for (Iterator it = v.getColumnIterator(); it.hasNext(); ) {
  Column column = (Column) it.next();
  column.getName(); // or .getQuotedName() or bunch of other useful stuff
}

Column documentation.

If you don’t have access to configuration, you can obtain column data from SessionFactory instance, however in this case you’re technically no longer using public API as you’ll have to class cast to internal implementations:

AbstractEntityPersister persister = (AbstractEntityPersister) sessionFactory.getClassMetadata(entityName);
String[] columnNames = persister.getPropertyColumnNames(propertyName);

In both cases entityName is the name of your entity (its class name unless explicitly overridden)