com.objectwave.persist.broker
Class SaveObjectsStrategy

java.lang.Object
  |
  +--com.objectwave.persist.broker.SaveObjectsStrategy

public class SaveObjectsStrategy

extends java.lang.Object

Figure out the order that the persistent objects should be saved.

Version:

$Id: SaveObjectsStrategy.java,v 1.1 2001/07/05 13:22:55 dave_hoag Exp $

Author:

dhoag

Constructor Summary

SaveObjectsStrategy()
Constructor for the SaveObjectsStrategy object

Method Summary

boolean	contains(java.lang.Object obj, java.util.List aList) Do an identity compare to determine if the List contains the object.
RDBPersistence	getRDBAdapter(Persistence object) A utility method that simplifies code.
void	saveObjects(java.util.ArrayList objs) Save all of the objects in the objs collection.
protected int	saveObjects(java.util.List objs, java.util.ArrayList undoList, int sizeOfLaterList, int depth) We may have several objects to save.
protected boolean	unsavedForeignKeys(AttributeTypeColumn[] fkColumns, Persistence sourceObj) Determines if in the collection of persistent objects if there exists an object that is neither transient nor 'saved'/persistent.

Methods inherited from class java.lang.Object

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

Constructor Detail

SaveObjectsStrategy

public SaveObjectsStrategy()

Constructor for the SaveObjectsStrategy object

Method Detail

getRDBAdapter

public final RDBPersistence getRDBAdapter(Persistence object)

A utility method that simplifies code.

Parameters:

object -

Returns:

The RDBAdapter value

saveObjects

public void saveObjects(java.util.ArrayList objs)
                 throws QueryException

Save all of the objects in the objs collection. This will attempt to save objects in an order that makes sense to a relational database.

Parameters:

objs - The peristent objects to save.

Throws:

QueryException

contains

public boolean contains(java.lang.Object obj,
                        java.util.List aList)

Do an identity compare to determine if the List contains the object. Created because most Lists do an 'equals' comparison, not an identity compare.

Parameters:

obj - java.lang.Object The object for which we are looking

aList - The list being searched.

Returns:

boolean true if the object is in the provided list.

saveObjects

protected int saveObjects(java.util.List objs,
                          java.util.ArrayList undoList,
                          int sizeOfLaterList,
                          int depth)
                   throws QueryException

We may have several objects to save. This attempts to save them in some 'order' that makes sense for a relational database.

Parameters:

objs - The peristent objects to save. This list should shrink with every recursive call

undoList - Those new objects that have been inserted into the database will be added to this list.

sizeOfLaterList -

depth -

Returns:

Throws:

QueryException

See Also:

#save

unsavedForeignKeys

protected boolean unsavedForeignKeys(AttributeTypeColumn[] fkColumns,
                                     Persistence sourceObj)

Determines if in the collection of persistent objects if there exists an object that is neither transient nor 'saved'/persistent.

Parameters:

fkColumns -

sourceObj -

Returns:

boolean true if there are unsaved foreign keys in the list of data.