| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.eagle.query.aggregate.timeseries; |
| |
| import java.util.Comparator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.SortedSet; |
| import java.util.TreeSet; |
| |
| public class PostHierarchicalAggregateSort { |
| |
| private static SortedSet<Map.Entry<String, HierarchicalAggregateEntity>> sortByValue(HierarchicalAggregateEntity entity, List<SortOption> sortOptions) { |
| SortedSet<Map.Entry<String, HierarchicalAggregateEntity>> sortedEntries = new TreeSet<Map.Entry<String, HierarchicalAggregateEntity>>(new MapEntryComparator(sortOptions)); |
| sortedEntries.addAll(entity.getChildren().entrySet()); |
| return sortedEntries; |
| } |
| |
| /** |
| * sort aggregated results with sort options |
| * |
| * @param result |
| * @param sortOptions |
| * @return |
| */ |
| public static HierarchicalAggregateEntity sort(HierarchicalAggregateEntity result, List<SortOption> sortOptions) { |
| SortedSet<Map.Entry<String, HierarchicalAggregateEntity>> tmp = sortByValue(result, sortOptions); |
| result.setSortedList(tmp); |
| result.setChildren(null); |
| for (Map.Entry<String, HierarchicalAggregateEntity> entry : tmp) { |
| sort(entry.getValue(), sortOptions); |
| } |
| return result; |
| } |
| |
| private static class MapEntryComparator implements Comparator<Map.Entry<String, HierarchicalAggregateEntity>> { |
| private List<SortOption> sortOptions; |
| |
| public MapEntryComparator(List<SortOption> sortOptions) { |
| this.sortOptions = sortOptions; |
| } |
| |
| /** |
| * default to sort by all groupby fields |
| */ |
| @Override |
| public int compare(Map.Entry<String, HierarchicalAggregateEntity> e1, Map.Entry<String, HierarchicalAggregateEntity> e2) { |
| int r = 0; |
| String key1 = e1.getKey(); |
| List<Double> valueList1 = e1.getValue().getValues(); |
| String key2 = e2.getKey(); |
| List<Double> valueList2 = e2.getValue().getValues(); |
| for (SortOption so : sortOptions) { |
| int index = so.getIndex(); |
| if (index == -1) { |
| continue; |
| } |
| if (!so.isInGroupby()) { // sort fields come from functions |
| Double value1 = valueList1.get(index); |
| Double value2 = valueList2.get(index); |
| r = value1.compareTo(value2); |
| } |
| // sort fields come from groupby fields, then silently ignored |
| |
| if (r == 0) { |
| continue; |
| } |
| if (!so.isAscendant()) { |
| r = -r; |
| } |
| return r; |
| } |
| // default to sort by groupby fields ascendently |
| if (r == 0) { |
| return key1.compareTo(key2); |
| } |
| return r; |
| } |
| } |
| } |