/**
* A real node-function (using the node argument). Returns the next newer node of same type. Also
* a nice example on the difference between core and bridge.
*/
public Object successor() {
if (node == null) throw new IllegalArgumentException("successor is a node-function");
if (cloud != null) {
log.debug("Using bridge (security restrictions will be honoured)");
NodeManager nm = node.getNodeManager();
NodeQuery q = nm.createQuery();
StepField field = q.getStepField(nm.getField("number"));
q.setConstraint(
q.createConstraint(
field, FieldCompareConstraint.GREATER, Integer.valueOf(node.getNumber())));
q.addSortOrder(field, SortOrder.ORDER_ASCENDING);
q.setMaxNumber(1);
NodeIterator i = nm.getList(q).nodeIterator();
return i.hasNext() ? i.nextNode() : null;
} else {
log.debug("Using core.");
throw new UnsupportedOperationException("Core implementation was dropped. See source code.");
/* This is how it would go with core objects
MMObjectBuilder builder = MMBase.getMMBase().getBuilder(node.getNodeManager().getName());
NodeSearchQuery query = new NodeSearchQuery(builder);
StepField field = query.getField(builder.getField("number"));
BasicFieldValueConstraint cons = new BasicFieldValueConstraint(field, node.getNumber());
cons.setOperator(FieldCompareConstraint.GREATER);
query.setConstraint(cons);
query.addSortOrder(field);
query.setMaxNumber(1);
try {
java.util.Iterator<MMObjectNode> i = builder.getNodes(query).iterator();
return i.hasNext() ? i.next() : null;
} catch (Exception e) {
return null;
}
*/
}
}
