protected String determineDatabaseDictionary(Database database) 
{
		switch (database) {
			case DB2: return "db2";
			case DERBY: return "derby";
			case HSQL: return "hsql(SimulateLocking=true)";
			case INFORMIX: return "informix";
			case MYSQL: return "mysql";
			case ORACLE: return "oracle";
			case POSTGRESQL: return "postgres";
			case SQL_SERVER: return "sqlserver";
			case SYBASE: return "sybase";
			default: return null;
		}
}

Determine the OpenJPA database dictionary name for the given database.

 public Class<EntityManagerFactory> getEntityManagerFactoryInterface() 
{
		return OpenJPAEntityManagerFactorySPI.class;
}

 public Class<EntityManager> getEntityManagerInterface() 
{
		return OpenJPAEntityManagerSPI.class;
}

 public JpaDialect getJpaDialect() 
{
		return this.jpaDialect;
}

 public Map<String, Object> getJpaPropertyMap() 
{
		Map< String, Object > jpaProperties = new HashMap< String, Object >();
		if (getDatabasePlatform() != null) {
			jpaProperties.put("openjpa.jdbc.DBDictionary", getDatabasePlatform());
		}
		else if (getDatabase() != null) {
			String databaseDictonary = determineDatabaseDictionary(getDatabase());
			if (databaseDictonary != null) {
				jpaProperties.put("openjpa.jdbc.DBDictionary", databaseDictonary);
			}
		}
		if (isGenerateDdl()) {
			jpaProperties.put("openjpa.jdbc.SynchronizeMappings", "buildSchema(ForeignKeys=true)");
		}
		if (isShowSql()) {
			// Taken from the OpenJPA 0.9.6 docs ("Standard OpenJPA Log Configuration + All SQL Statements")
			jpaProperties.put("openjpa.Log", "DefaultLevel=WARN, Runtime=INFO, Tool=INFO, SQL=TRACE");
		}
		return jpaProperties;
}

 public PersistenceProvider getPersistenceProvider() 
{
		return this.persistenceProvider;
}

 public String getPersistenceProviderRootPackage() 
{
		return "org.apache.openjpa";
}