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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2001 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.access;
import net.wotonomy.control.EOClassDescription;
import net.wotonomy.control.EOEditingContext;
import net.wotonomy.control.EOFetchSpecification;
import net.wotonomy.control.EOGlobalID;
import net.wotonomy.control.EOKeyValueCodingAdditions;
import net.wotonomy.foundation.NSArray;
import net.wotonomy.foundation.NSDictionary;
import net.wotonomy.foundation.NSMutableArray;
/**
*
* @author ezamudio@nasoft.com
* @author $Author: cgruber $
* @version $Revision: 894 $
*/
public class EODatabaseChannel {
protected EODatabaseContext _context;
protected EOAdaptorChannel _channel;
protected EOEntity _currEntity;
protected EOEditingContext _currEC;
protected NSArray _attributes;
protected boolean _locking;
protected boolean _refreshing;
public EODatabaseChannel(EODatabaseContext context) {
super();
_context = context;
_channel = _context.adaptorContext().createAdaptorChannel();
}
public EOAdaptorChannel adaptorChannel() {
return _channel;
}
public EODatabaseContext databaseContext() {
return _context;
}
public void cancelFetch() {
_channel.cancelFetch();
}
public Object fetchObject() {
NSDictionary r = _channel.fetchRow();
EOGlobalID gid = _currEntity.globalIDForRow(r);
Object eo = _currEC.objectForGlobalID(gid);
if (eo == null) {
eo = EOClassDescription.classDescriptionForEntityName(_currEntity.name()).createInstanceWithEditingContext(_currEC, gid);
if (eo instanceof EOKeyValueCodingAdditions)
((EOKeyValueCodingAdditions)eo).takeValuesFromDictionary(r);
else
EOKeyValueCodingAdditions.DefaultImplementation.takeValuesFromDictionary(eo, r);
} else {
if (isRefreshingObjects()) {
//TODO: refresh object (how?)
}
}
return eo;
}
public boolean isFetchInProgress() {
return _channel.isFetchInProgress();
}
public void setIsLocking(boolean flag) {
_locking = flag;
}
public boolean isLocking() {
return _locking;
}
public void setIsRefreshingObjects(boolean flag) {
_refreshing = flag;
}
public boolean isRefreshingObjects() {
return _refreshing;
}
public void selectObjectsWithFetchSpecification(EOFetchSpecification fspec, EOEditingContext ec) {
setIsLocking(fspec.locksObjects());
setIsRefreshingObjects(fspec.refreshesRefetchedObjects());
setCurrentEditingContext(ec);
setCurrentEntity(databaseContext().database().entityNamed(fspec.entityName()));
NSMutableArray atts = new NSMutableArray();
atts.addObjectsFromArray(_currEntity.attributes());
adaptorChannel().selectAttributes(atts, fspec, isLocking(), _currEntity);
adaptorChannel().setAttributesToFetch(atts);
_attributes = atts;
}
public void setCurrentEditingContext(EOEditingContext ec) {
_currEC = ec;
}
public void setCurrentEntity(EOEntity entity) {
_currEntity = entity;
}
}
/*
* $Log$
* Revision 1.2 2006/02/16 16:47:14 cgruber
* Move some classes in to "internal" packages and re-work imports, etc.
*
* Also use UnsupportedOperationExceptions where appropriate, instead of WotonomyExceptions.
*
* Revision 1.1 2006/02/16 13:19:57 cgruber
* Check in all sources in eclipse-friendly maven-enabled packages.
*
* Revision 1.2 2003/08/29 21:15:46 chochos
* use EOEntity's globalIDForRow method.
*
* Revision 1.1 2003/08/19 01:54:43 chochos
* The EODatabase layer still needs a lot of work, but it's on its way...
*
*/
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