| /** |
| * 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.atlas.util; |
| |
| import org.apache.atlas.model.typedef.AtlasClassificationDef; |
| import org.apache.atlas.model.typedef.AtlasEntityDef; |
| import org.apache.atlas.model.typedef.AtlasStructDef; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| public class TypeDefSorter { |
| private static final Logger LOG = LoggerFactory.getLogger(TypeDefSorter.class); |
| |
| public static <T extends AtlasStructDef> List<T> sortTypes(List<T> types) { |
| Map<String, T> typesByName = new HashMap<>(); |
| for (T type : types) { |
| typesByName.put(type.getName(), type); |
| } |
| List<T> result = new ArrayList<>(types.size()); |
| Set<T> processed = new HashSet<>(); |
| for (T type : types) { |
| addToResult(type, result, processed, typesByName); |
| } |
| return result; |
| } |
| |
| private static <T extends AtlasStructDef> void addToResult(T type, List<T> result, |
| Set<T> processed, |
| Map<String, T> typesByName) { |
| if (processed.contains(type)) { |
| return; |
| } |
| processed.add(type); |
| Set<String> superTypeNames = new HashSet<>(); |
| if (type.getClass().equals(AtlasClassificationDef.class)) { |
| try { |
| AtlasClassificationDef classificationDef = AtlasClassificationDef.class.cast(type); |
| superTypeNames.addAll(classificationDef.getSuperTypes()); |
| } catch (ClassCastException ex) { |
| LOG.warn("Casting to ClassificationDef failed"); |
| } |
| } |
| if (type.getClass().equals(AtlasEntityDef.class)) { |
| try { |
| AtlasEntityDef entityDef = AtlasEntityDef.class.cast(type); |
| superTypeNames.addAll(entityDef.getSuperTypes()); |
| } catch (ClassCastException ex) { |
| LOG.warn("Casting to AtlasEntityDef failed"); |
| } |
| } |
| |
| for (String superTypeName : superTypeNames) { |
| // Recursively add any supertypes first to the result. |
| T superType = typesByName.get(superTypeName); |
| if (superType != null) { |
| addToResult(superType, result, processed, typesByName); |
| } |
| } |
| result.add(type); |
| } |
| } |