content: /**
   * 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.repository.graphdb.janus.migration;
  
  import org.apache.atlas.model.TypeCategory;
  import org.apache.atlas.type.AtlasArrayType;
  import org.apache.atlas.type.AtlasEntityType;
  import org.apache.atlas.type.AtlasMapType;
  import org.apache.atlas.type.AtlasStructType;
  import org.apache.atlas.type.AtlasStructType.AtlasAttribute;
  import org.apache.atlas.type.AtlasType;
  import org.apache.atlas.type.AtlasTypeRegistry;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.EnumSet;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import static org.apache.atlas.model.TypeCategory.ENTITY;
  import static org.apache.atlas.model.TypeCategory.OBJECT_ID_TYPE;
  import static org.apache.atlas.model.TypeCategory.STRUCT;
  
  public class TypesWithCollectionsFinder {
      private static final Logger LOG = LoggerFactory.getLogger(TypesWithCollectionsFinder.class);
  
      static final EnumSet<TypeCategory> nonPrimitives = EnumSet.of(ENTITY, STRUCT, OBJECT_ID_TYPE);
  
      private TypesWithCollectionsFinder() {
          // to block instantiation
      }
  
      public static Map<String, Map<String, List<String>>> getVertexPropertiesForCollectionAttributes(AtlasTypeRegistry typeRegistry) {
          Map<String, Map<String, List<String>>> ret = new HashMap<>();
  
          addVertexPropertiesForCollectionAttributes(typeRegistry.getAllEntityTypes(), ret);
          addVertexPropertiesForCollectionAttributes(typeRegistry.getAllStructTypes(), ret);
          addVertexPropertiesForCollectionAttributes(typeRegistry.getAllClassificationTypes(), ret);
  
          displayInfo("types with properties: ", ret);
  
          return ret;
      }
  
      static Map<String, List<String>> getVertexPropertiesForCollectionAttributes(AtlasStructType type) {
          try {
              Map<String, List<String>> collectionProperties = new HashMap<>();
  
              for (AtlasAttribute attr : type.getAllAttributes().values()) {
                  addIfCollectionAttribute(attr, collectionProperties);
              }
  
              if (type instanceof AtlasEntityType) {
                  AtlasEntityType entityType = (AtlasEntityType) type;
  
                  for (Map<String, AtlasAttribute> attrs : entityType.getRelationshipAttributes().values()) {
                      for (AtlasAttribute attr : attrs.values()) {
                          addIfCollectionAttribute(attr, collectionProperties);
                      }
                  }
              }
              return collectionProperties;
          } catch (Exception e) {
              LOG.error("addVertexPropertiesForCollectionAttributes", e);
          }
  
          return null;
      }
  
      static void displayInfo(String message, Map<String, Map<String, List<String>>> map) {
          LOG.info(message);
  
          for (Map.Entry<String, Map<String, List<String>>> e : map.entrySet()) {
              LOG.info("  type: {} : {}", e.getKey(), e.getValue());
          }
      }
  
      private static void addVertexPropertiesForCollectionAttributes(Collection<? extends AtlasStructType> types, Map<String, Map<String, List<String>>> typeAttrMap) {
          for (AtlasStructType type : types) {
              Map<String, List<String>> collectionProperties = getVertexPropertiesForCollectionAttributes(type);
  
              if (collectionProperties != null && !collectionProperties.isEmpty()) {
                  typeAttrMap.put(type.getTypeName(), collectionProperties);
              }
          }
      }
  
      private static void addIfCollectionAttribute(AtlasAttribute attr, Map<String, List<String>> collectionProperties) {
          AtlasType    attrType         = attr.getAttributeType();
          TypeCategory attrTypeCategory = attrType.getTypeCategory();
  
          switch (attrTypeCategory) {
              case ARRAY: {
                  TypeCategory arrayElementType = ((AtlasArrayType) attrType).getElementType().getTypeCategory();
  
                  if (nonPrimitives.contains(arrayElementType)) {
                      addVertexProperty(attrTypeCategory.toString(), attr.getVertexPropertyName(), collectionProperties);
                  }
              }
              break;
  
              case MAP: {
                  TypeCategory mapValueType = ((AtlasMapType) attrType).getValueType().getTypeCategory();
  
                  if (nonPrimitives.contains(mapValueType)) {
                      addVertexProperty(attrTypeCategory.toString(), attr.getVertexPropertyName(), collectionProperties);
                  } else {
                      addVertexProperty(attrTypeCategory + "_PRIMITIVE", attr.getVertexPropertyName(), collectionProperties);
                  }
              }
              break;
          }
      }
  
      private static void addVertexProperty(String collectionType, String propertyName, Map<String, List<String>> collectionProperties) {
          if (!collectionProperties.containsKey(collectionType)) {
              collectionProperties.put(collectionType, new ArrayList<>());
          }
  
          collectionProperties.get(collectionType).add(propertyName);
      }
  }
  