private static Collection<OIndex<?>> prepareLastIndexVariants( OClass iSchemaClass, OSQLFilterItemField.FieldChain fieldChain) { OClass oClass = iSchemaClass; final Collection<OIndex<?>> result = new ArrayList<OIndex<?>>(); for (int i = 0; i < fieldChain.getItemCount() - 1; i++) { oClass = oClass.getProperty(fieldChain.getItemName(i)).getLinkedClass(); if (oClass == null) { return result; } } final Set<OIndex<?>> involvedIndexes = new TreeSet<OIndex<?>>( new Comparator<OIndex<?>>() { public int compare(OIndex<?> o1, OIndex<?> o2) { return o1.getDefinition().getParamCount() - o2.getDefinition().getParamCount(); } }); involvedIndexes.addAll( oClass.getInvolvedIndexes(fieldChain.getItemName(fieldChain.getItemCount() - 1))); final Collection<Class<? extends OIndex>> indexTypes = new HashSet<Class<? extends OIndex>>(3); for (OIndex<?> involvedIndex : involvedIndexes) { if (!indexTypes.contains(involvedIndex.getInternal().getClass())) { result.add(involvedIndex); indexTypes.add(involvedIndex.getInternal().getClass()); } } return result; }
private static List<OIndex<?>> prepareBaseIndexes( OClass iSchemaClass, OSQLFilterItemField.FieldChain fieldChain) { List<OIndex<?>> result = new ArrayList<OIndex<?>>(fieldChain.getItemCount() - 1); OClass oClass = iSchemaClass; for (int i = 0; i < fieldChain.getItemCount() - 1; i++) { final Set<OIndex<?>> involvedIndexes = oClass.getInvolvedIndexes(fieldChain.getItemName(i)); final OIndex<?> bestIndex = findBestIndex(involvedIndexes); if (bestIndex == null) return null; result.add(bestIndex); oClass = oClass.getProperty(fieldChain.getItemName(i)).getLinkedClass(); } return result; }