public NSArray statementsToDropPrimaryKeyConstraintsOnEntityGroups(
NSArray entityGroups,
EOSchemaSynchronizationModelChanges changes,
EOSchemaGenerationOptions options) {
if (entityGroups == null) return NSArray.EmptyArray;
if (changes == null) changes = newChanges();
NSMutableArray expressions = new NSMutableArray();
for (Enumeration enumerator = entityGroups.objectEnumerator();
enumerator.hasMoreElements(); ) {
NSArray entities = (NSArray) enumerator.nextElement();
EOEntity _last =
(EOEntity)
entities.lastObject(); // only need entity to get the table name for the group
String nameInObjectStore =
_nameInObjectStoreForEntityGroupWithChangeDictionary(
entities, changes.changesForTableNamed(_last.externalName()));
if ((nameInObjectStore != null) && (!"".equals(nameInObjectStore))) {
expressions.addObject(
this._expressionForString(
"delete from _SYS_RELATIONSHIP where source_table = '"
+ nameInObjectStore
+ "' or dest_table = '"
+ nameInObjectStore
+ "'"));
}
}
return expressions.immutableClone();
}
/*
* [PJYF Oct 19 2004]
* This is a bad hack to get WO to create indes for external keys.
* We use the primary key constrain generation to create our indexes.
* But we need to be carefull not to overwrite previous constrains
*
*/
protected boolean isSinglePrimaryKeyAttribute(EOAttribute attribute) {
if (attribute == null) return false;
EOEntity entity = (EOEntity) attribute.entity();
if ((entity == null) || entity.isAbstractEntity() || (entity.externalName() == null))
return false;
NSArray primaryKeyAttributes = entity.primaryKeyAttributes();
if (primaryKeyAttributes.count() != 1) return false;
return attribute.name().equals(((EOAttribute) primaryKeyAttributes.lastObject()).name());
}
