File Doc Category Size Date Package
ClassExtractor.java API Doc Glassfish v2 API 3130 Tue May 22 16:54:16 BST 2007 oracle.toplink.essentials.descriptors

ClassExtractor

java.lang.Object

public abstract class ClassExtractor extends Object

Purpose: Abstract class to allow complex inheritance support. Typically class indicators are used to define inheritance in the database, however in complex cases the class type may be determined through another mechanism. The class extractor must be able to determine and return the class type from the database row.

see: oracle.toplink.essentials.descriptors.InheritancePolicy#setClassExtractor(ClassExtrator)

Fields Summary
Constructors Summary
Methods Summary
public abstract java.lang.Class extractClassFromRow(oracle.toplink.essentials.sessions.Record databaseRow, oracle.toplink.essentials.sessions.Session session)
Extract/compute the class from the database row and return the class. Map is used as the public interface to database row, the key is the field name, the value is the database value.
public void initialize(oracle.toplink.essentials.descriptors.ClassDescriptor descriptor, oracle.toplink.essentials.sessions.Session session)
Allow for any initialization.
// Do nothing by default.