Examples of org.datanucleus.store.rdbms.table.ClassTable

org.datanucleus.store.rdbms.table.ClassTable

Table representing a Java class (or classes) as a first class object (FCO). Uses the inheritance strategy to control whether this represents multiple classes or just the one class.

Mappings

This class adds some additional mappings over what the superclass provides. Here we add

externalFkMappings - any mappings for Collections that have no associated field in this class, providing the foreign key column(s)
externalOrderMappings - mappings for any ordering column used by Lists for ordering elements of this class
externalFkDiscriminatorMappings - mappings for any discriminator column used when sharing external foreign keys to distinguish the element owner field

Classes

A table can represent multiple classes. It has a nominal owner which is the class that has an inheritance strategy of "new-table". All classes that utilise this table have their MetaData stored in this object.

Secondary Tables

This class represents a "primary" table. That is, the main table where objects of a class are persisted. It can have several "secondary" tables where some of the classes fields are stored at persistence.


            if (candidateCmd.hasVersionStrategy() && options.contains(OPTION_BULK_UPDATE_VERSION))
            {
                SQLExpression updateSqlExpr = null;


                ClassTable table = (ClassTable)stmt.getPrimaryTable().getTable();
                JavaTypeMapping verMapping = table.getVersionMapping(true);
                ClassTable verTable = table.getTableManagingMapping(verMapping);
                VersionMetaData vermd = candidateCmd.getVersionMetaData();
                if (vermd.getVersionStrategy() == VersionStrategy.VERSION_NUMBER)
                {
                    // Increment the version
                    SQLTable verSqlTbl = stmt.getTable(verTable, stmt.getPrimaryTable().getGroupName());

                        {
                            t = new ClassView(tableName, RDBMSStoreManager.this, cmd);
                        }
                        else
                        {
                            t = new ClassTable(tableName, RDBMSStoreManager.this, cmd);
                        }


                        sdNew = new RDBMSStoreData(cmd, t, true);
                        registerStoreData(sdNew);