code: public static String getDefaultJdbcTypeFor(String javaType)
      {
          return _jdbcMappings.containsKey(javaType) ? (String)_jdbcMappings.get(javaType) : JDBC_DEFAULT_TYPE;
      }
docs: Returns the default jdbc type for the given java type.
  
  @param javaType The qualified java type
  @return The default jdbc type