rmrs.persist
Class RelationalBroker

java.lang.Object
  |
  +--rmrs.persist.RelationalBroker

Direct Known Subclasses:

ObjectRelationalBroker

public class RelationalBroker

extends java.lang.Object

implements PersistenceBroker

A persistence broker for relational data bases. Will use one table per class along the path of generalization. All will use the OID as a shared key.

Version:

$Id: RelationalBroker.java,v 1.1 1999/12/06 19:25:44 schadow Exp SCHADOW_G $

Author:

Gunther Schadow

Field Summary

protected java.util.Hashtable	classMap
protected java.sql.Connection	con
protected java.util.Hashtable	objectCache
protected java.lang.String	password
protected java.lang.String	url
protected java.lang.String	user

Constructor Summary

RelationalBroker(java.sql.Connection con)

RelationalBroker(java.lang.String url, java.lang.String user, java.lang.String password)

Method Summary

protected void	buildQuery(java.lang.Object queryExample, rmrs.persist.SQLSelect sql, java.lang.String prefix, rmrs.persist.RelClassMapping classMapping)
protected void	doLoad(java.lang.Object o, java.sql.ResultSet rs, java.lang.String prefix, rmrs.persist.RelClassMapping classMapping)
protected void	doSave(java.lang.Object o, rmrs.persist.SQLStatement sql, java.lang.String prefix, rmrs.persist.RelClassMapping classMapping)
protected void	initializeClassMap()
PersistentObject	load(java.lang.Class classToConformTo, OID oid) LOAD
ObjectSet	query(PersistentObject queryExample) QUERY
protected void	register(PersistentObject o)
OID	save(PersistentObject o) SAVE

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

classMap

protected java.util.Hashtable classMap

url

protected java.lang.String url

user

protected java.lang.String user

password

protected java.lang.String password

con

protected java.sql.Connection con

objectCache

protected java.util.Hashtable objectCache

Constructor Detail

RelationalBroker

public RelationalBroker(java.lang.String url,
                        java.lang.String user,
                        java.lang.String password)
                 throws PersistException

RelationalBroker

public RelationalBroker(java.sql.Connection con)
                 throws PersistException

Method Detail

initializeClassMap

protected void initializeClassMap()
                           throws PersistException

register

protected void register(PersistentObject o)
                 throws PersistException

save

public OID save(PersistentObject o)
         throws PersistException

SAVE

Specified by:

save in interface PersistenceBroker

doSave

protected void doSave(java.lang.Object o,
                      rmrs.persist.SQLStatement sql,
                      java.lang.String prefix,
                      rmrs.persist.RelClassMapping classMapping)
               throws PersistException,
                      java.lang.IllegalAccessException

load

public PersistentObject load(java.lang.Class classToConformTo,
                             OID oid)
                      throws PersistException

LOAD

Specified by:

load in interface PersistenceBroker

doLoad

protected void doLoad(java.lang.Object o,
                      java.sql.ResultSet rs,
                      java.lang.String prefix,
                      rmrs.persist.RelClassMapping classMapping)
               throws PersistException,
                      java.lang.IllegalAccessException,
                      java.sql.SQLException,
                      java.lang.InstantiationException

query

public ObjectSet query(PersistentObject queryExample)
                throws PersistException

QUERY

Specified by:

query in interface PersistenceBroker

buildQuery

protected void buildQuery(java.lang.Object queryExample,
                          rmrs.persist.SQLSelect sql,
                          java.lang.String prefix,
                          rmrs.persist.RelClassMapping classMapping)
                   throws PersistException,
                          java.lang.IllegalAccessException