public void delete(OpenJPAStateManager sm, JDBCStore store, RowManager rm) throws SQLException {
if (field.getMappedBy() != null) return;
// if nullable, null any existing inverse columns that refer to this obj
ValueMapping elem = field.getElementMapping();
ColumnIO io = elem.getColumnIO();
ForeignKey fk = elem.getForeignKey();
if (!elem.getUseClassCriteria() && io.isAnyUpdatable(fk, true)) {
assertInversable();
Row row = rm.getAllRows(fk.getTable(), Row.ACTION_UPDATE);
row.setForeignKey(fk, io, null);
row.whereForeignKey(fk, sm);
rm.flushAllRows(row);
return;
}
if (!sm.getLoaded().get(field.getIndex())) return;
// update fk on each field value row
ClassMapping rel = field.getElementMapping().getTypeMapping();
StoreContext ctx = store.getContext();
Collection objs = toCollection(sm.fetchObject(field.getIndex()));
if (objs != null && !objs.isEmpty())
for (Iterator itr = objs.iterator(); itr.hasNext(); )
updateInverse(ctx, itr.next(), rel, rm, sm, 0);
}
/** This method updates the inverse columns of a 1-M related object with the given oid. */
private void updateInverse(
StoreContext ctx,
Object inverse,
ClassMapping rel,
RowManager rm,
OpenJPAStateManager sm,
int idx)
throws SQLException {
OpenJPAStateManager invsm = RelationStrategies.getStateManager(inverse, ctx);
if (invsm == null) return;
ValueMapping elem = field.getElementMapping();
ForeignKey fk = elem.getForeignKey();
ColumnIO io = elem.getColumnIO();
Column order = field.getOrderColumn();
int action;
boolean writeable;
boolean orderWriteable;
if (invsm.isNew() && !invsm.isFlushed()) {
// no need to null inverse columns of new instance
if (sm == null || sm.isDeleted()) return;
writeable = io.isAnyInsertable(fk, false);
orderWriteable = _orderInsert;
action = Row.ACTION_INSERT;
} else if (invsm.isDeleted()) {
// no need to null inverse columns of deleted instance
if (invsm.isFlushed() || sm == null || !sm.isDeleted()) return;
writeable = true;
orderWriteable = false;
action = Row.ACTION_DELETE;
} else {
if (sm != null && sm.isDeleted()) sm = null;
writeable = io.isAnyUpdatable(fk, sm == null);
orderWriteable = field.getOrderColumnIO().isUpdatable(order, sm == null);
action = Row.ACTION_UPDATE;
}
if (!writeable && !orderWriteable) return;
assertInversable();
// if this is an update, this might be the only mod to the row, so
// make sure the where condition is set
Row row = rm.getRow(fk.getTable(), action, invsm, true);
if (action == Row.ACTION_UPDATE) row.wherePrimaryKey(invsm);
// update the inverse pointer with our oid value
if (writeable) row.setForeignKey(fk, io, sm);
if (orderWriteable) row.setInt(order, idx);
}
