JDBC Developer's Guide - Supra - Cincom

Relating Java classes to database class namesThe type map relates a Java class to a Cincom ORDB class name, which is aone-to-one mapping. This one-to-one mapping is stored in a hash table as akey-value pair. When you request custom mapping to be performed on aCincom ORDB object reference, the JDBC driver considers the type map todetermine which Java class to use to materialize the data from the databaseobject. Once the object data is materialized as a Java object, you can updatethe attributes in the Java object. The changes can then be persisted in thedatabase by invoking the writeSQL() method of the java object. The driverhandles the actual conversion between SQL and Java.The Java application programmer is responsible for providing a type map classthat implements java.util.Dictionary. For example,java.util.Hashtable implements Dictionary.The type map class must implement a put() method used to enter eachmapping entry that relates a Java class to a database class name. The put()method must be implemented to accept a keyword-value pair, where thekeyword is an database class name and the value is the Java class object.Each connection object has an attribute for an associated type map object.JDBC Developer's Guide, P25-9504-03 Page 48Chapter: 4. Cincom ORDB ExtensionsSection: Creating custom Java classes for Cincom ORDB objects