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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2000 Michael Powers
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see http://www.gnu.org
*/
package net.wotonomy.datastore;
import java.util.List;
import java.util.Observer;
public interface DataView extends List {
// public void newQuery( String aProperty, Object beginKey, Object endKey );
// public void addQuery( String aProperty, Object beginKey, Object endKey );
// public void removeQuery( String aProperty, Object beginKey, Object endKey );
// public void retainQuery( String aProperty, Object beginKey, Object endKey );
/**
* This method is called to notify the DataView that one of its objects has been
* modified and should be updated when the view is committed.
*/
public void update(Object o);
/**
* This method is called commit all changes to the DataView to its data store.
* The list elements may be refreshed from the datastore, although the list
* itself should remain unchanged.
*
* @return True if the commit was successful, otherwise false.
*/
public boolean commit();
/**
* Called to add the specified observer to the list of observers that should
* receive notifications when the view if modified. DataViews notify when
* objects are added, updated, or deleted, passing the affected object as the
* parameter to the Observer's notify method.
*
* @param o The observer to add.
*/
public void addObserver(Observer o);
/**
* Called to remove the specified observer from the list of observers that
* should receive notifications when the view if modified.
*
* @param o The observer to delete.
*/
public void deleteObserver(Observer o);
/**
* Called to clear the list of observers that should receive notifications when
* the view if modified.
*/
public void deleteObservers();
/**
* Returns the key for the specified object. If the object is not in the view,
* returns null.
*/
public DataKey getKeyForObject(Object anObject);
/**
* Returns the object for the specified key. If the key is not in the view,
* returns null.
*/
public Object getObjectForKey(DataKey aKey);
}
/*
* $Log$ Revision 1.2 2006/02/19 16:26:19 cgruber Move non-unit-test code to
* tests project Fix up code to work with proper imports Fix maven dependencies.
*
* Revision 1.1 2006/02/16 13:18:56 cgruber Check in all sources in
* eclipse-friendly maven-enabled packages.
*
* Revision 1.2 2001/02/15 21:12:41 mpowers Added accessors for key throughout
* the api. This breaks compatibility. insertObject now returns the permanent
* key for the newly created object. The old way returned a copy of the object
* which was an additional read that was often ignored. Now you can read it only
* if you need it. Furthermore, there was not other way of getting the permanent
* key.
*
* Revision 1.1.1.1 2000/12/21 15:47:05 mpowers Contributing wotonomy.
*
* Revision 1.2 2000/12/20 16:25:36 michael Added log to all files.
*
*
*/
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