Resolving HHH-5588: Improve support for entityNames in envers.

Adding methods for knowing if an entityName is marked to be resolved by core (@Audited(targetAuditMode='NOT_AUDITED')
	isEntityNameNotAudited()

Adding method to resolve the entityName for an entity retrieved previously by envers.
	getEntityName()

envers/src/main/java/org/hibernate/envers/AuditReader.java

@@ -28,13 +28,14 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
+import org.hibernate.envers.exception.EnversException;
 import org.hibernate.envers.exception.NotAuditedException;
 import org.hibernate.envers.exception.RevisionDoesNotExistException;
 import org.hibernate.envers.query.AuditQueryCreator;
 
 /**
  * @author Adam Warski (adam at warski dot org)
- * @author Hern<EFBFBD>n Chanfreau
+ * @author Hern&aacute;n Chanfreau
  */
 public interface AuditReader {
     /**
@@ -177,10 +178,58 @@ public interface AuditReader {
     AuditQueryCreator createQuery();
 
     /**
-     * Checks if the entityClass was configured to be audited.
+	 * Checks if the entityClass was configured to be audited. Calling
+	 * isEntityNameAudited() with the string of the class name will return the
+	 * same value.
      *  
-     * @param entityClass Class of the entity asking for audit support
+	 * @param entityClass
+	 *            Class of the entity asking for audit support
      * @return true if the entityClass is audited.
      */
     boolean isEntityClassAudited(Class<?> entityClass);
+	
+	/**
+	 * Checks if the entityName was configured to be audited.
+	 * 
+	 * @param entityClass
+	 *            EntityName of the entity asking for audit support.
+	 * @return true if the entityName is audited.
+	 */
+	boolean isEntityNameAudited(String entityName);	
+
+	/**
+	 * Checks if the entityClass was configured to be a audited in a relation
+	 * with the targetAuditMode as NOT_AUDITED . Calling
+	 * isEntityNameNotAudited() with the string of the class name will return
+	 * the same value.
+	 * 
+	 * @param entityClass
+	 *            Class of the entity asking for
+	 *            @Audit(targetAuditMode=...NOT_AUDITED) support
+	 * @return true if the entityClass is marked in a relation as NOT_AUDITED.
+	 */
+	boolean isEntityClassNotAudited(Class<?> entityClass);
+	
+	/**
+	 * Checks if the entityName was configured be a audited in a relation
+	 * with the targetAuditMode as NOT_AUDITED .
+	 * 
+	 * @param entityClass
+	 *            Class of the entity asking for
+	 *            @Audit(targetAuditMode=...NOT_AUDITED) support
+	 * @return true if the entityClass is marked in a relation as NOT_AUDITED.
+	 */
+	boolean isEntityNameNotAudited(String entityName);	
+
+	/**
+	 * 
+	 * @param entity
+	 *            that was obtained previously from the same AuditReader.
+	 * 
+	 * @return the entityName for the given entity, null in case the entity is
+	 *         not associated with this AuditReader instance.
+	 */
+	String getEntityName(Object primaryKey, Number revision, Object entity)
+			throws EnversException;
+	
 }

envers/src/main/java/org/hibernate/envers/reader/AuditReaderImpl.java

@@ -42,16 +42,18 @@ import org.hibernate.Session;
 import org.hibernate.engine.SessionImplementor;
 import org.hibernate.envers.configuration.AuditConfiguration;
 import org.hibernate.envers.exception.AuditException;
+import org.hibernate.envers.exception.EnversException;
 import org.hibernate.envers.exception.NotAuditedException;
 import org.hibernate.envers.exception.RevisionDoesNotExistException;
 import org.hibernate.envers.query.AuditEntity;
 import org.hibernate.envers.query.AuditQueryCreator;
 import org.hibernate.envers.synchronization.AuditProcess;
 import org.hibernate.event.EventSource;
+import org.hibernate.proxy.HibernateProxy;
 
 /**
  * @author Adam Warski (adam at warski dot org)
- * @author Hern<EFBFBD>n Chanfreau
+ * @author Hern&aacute;n Chanfreau
  */
 public class AuditReaderImpl implements AuditReaderImplementor {
     private final AuditConfiguration verCfg;
@@ -256,10 +258,44 @@ public class AuditReaderImpl implements AuditReaderImplementor {
     }
 	
     public boolean isEntityClassAudited(Class<?> entityClass) {
-        checkNotNull(entityClass, "Entity class");
-        checkSession();
+    	return this.isEntityNameAudited(entityClass.getName());
+    }
 
-        String entityName = entityClass.getName();       
+
+	public boolean isEntityNameAudited(String entityName) {
+        checkNotNull(entityName, "Entity name");
+        checkSession();
         return (verCfg.getEntCfg().isVersioned(entityName));
     }	
+
+	public boolean isEntityClassNotAudited(Class<?> entityClass) {
+    	return this.isEntityNameNotAudited(entityClass.getName());
+	}
+
+	public boolean isEntityNameNotAudited(String entityName) {
+        checkNotNull(entityName, "Entity name");
+        checkSession();
+        return (verCfg.getEntCfg().isNotAudited(entityName));
+	}
+
+
+	public String getEntityName(Object primaryKey, Number revision ,Object entity) throws EnversException{
+        checkNotNull(primaryKey, "Primary key");
+        checkNotNull(revision, "Entity revision");
+        checkPositive(revision, "Entity revision");
+        checkNotNull(entity, "Entity");
+        checkSession();
+
+		// Unwrap if necessary
+		if(entity instanceof HibernateProxy) {
+			entity = ((HibernateProxy)entity).getHibernateLazyInitializer().getImplementation();
+		}
+		if(firstLevelCache.containsEntityName(primaryKey, revision, entity)) {
+			// it´s on envers FLC! 
+			return firstLevelCache.getFromEntityNameCache(primaryKey, revision, entity);
+		} else {
+			throw new EnversException(
+						"Can´t resolve entityName for historic entity. The id, revision and entity is not on envers first level cache.");
+    }	
+}
 }