On Jan 24, 2008, at 6:57 AM, Lachlan Deck wrote:
On 23/01/2008, at 9:12 PM, Andrus Adamchik wrote:
No replacement API in Cayenne. This was not deemed a useful user-
level functionality,
It was useful to me ;-)
e.g.,
ObjectId rowId = dataRow.createObjectId(anObjEntity);
Map ids = rowId.getIdSnapshot();
If I'm traversing the entire database (for example to determine what
records to queue for later processing by another thread) the above
means I don't need to fault in the real object to obtain the primary
key values.
You can write a very simple utility method, e.g.:
DbEntity entity = ...
Map<String, Object> pk = new HashMap<String, Object>();
for (DbAttribute attribute : entity.getPrimaryKeys()) {
pk.put(attribute.getName(), row.get(attribute.getName());
}
and Cayenne itself uses a private method elsewhere to create
ObjectId's, hence the deprecation.
Okay, so when dealing with raw rows, what's the recommended route?
Also is there an equivalent for
EOEntity.qualifierForPrimaryKey(NSDictionary) in order to build up
an or'd expression (as opposed to individually calling
DataObjectUtils.objectForPK(ObjectContext, String, Map) ?
ExpressionFactory.matchAllDbExp(..)
Andrus
