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.notification.preprocessor;
  
  import org.apache.atlas.model.instance.AtlasEntity;
  import org.apache.atlas.model.instance.AtlasObjectId;
  import org.apache.commons.collections.MapUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  public class RdbmsPreprocessor {
      private static final Logger LOG = LoggerFactory.getLogger(RdbmsPreprocessor.class);
  
      private static final String RELATIONSHIP_TYPE_RDBMS_INSTANCE_DATABASES = "rdbms_instance_databases";
      private static final String RELATIONSHIP_TYPE_RDBMS_DB_TABLES          = "rdbms_db_tables";
      private static final String RELATIONSHIP_TYPE_RDBMS_TABLE_COLUMNS      = "rdbms_table_columns";
      private static final String RELATIONSHIP_TYPE_RDBMS_TABLE_INDEXES      = "rdbms_table_indexes";
      private static final String RELATIONSHIP_TYPE_RDBMS_TABLE_FOREIGN_KEYS = "rdbms_table_foreign_key";
  
      static class RdbmsInstancePreprocessor extends RdbmsTypePreprocessor {
          public RdbmsInstancePreprocessor() {
              super(TYPE_RDBMS_INSTANCE);
          }
      }
  
      static class RdbmsDbPreprocessor extends RdbmsTypePreprocessor {
          public RdbmsDbPreprocessor() {
              super(TYPE_RDBMS_DB);
          }
      }
  
      static class RdbmsTablePreprocessor extends RdbmsTypePreprocessor {
          public RdbmsTablePreprocessor() {
              super(TYPE_RDBMS_TABLE);
          }
  
          @Override
          public void preprocess(AtlasEntity entity, PreprocessorContext context) {
              super.preprocess(entity, context);
  
              // try auto-fix when 'db' attribute is not present in relationshipAttribute & attributes
              Object db = entity.getRelationshipAttribute(ATTRIBUTE_DB);
  
              if (db == null) {
                  db = entity.getAttribute(ATTRIBUTE_DB);
              }
  
              if (db == null) {
                  String dbQualifiedName = getDbQualifiedName(entity);
  
                  if (dbQualifiedName != null) {
                      AtlasObjectId dbId = new AtlasObjectId(TYPE_RDBMS_DB, Collections.singletonMap(ATTRIBUTE_QUALIFIED_NAME, dbQualifiedName));
  
                      LOG.info("missing attribute {}.{} is set to {}", TYPE_RDBMS_TABLE, ATTRIBUTE_DB, dbId);
  
                      entity.setRelationshipAttribute(ATTRIBUTE_DB, dbId);
                  }
              }
          }
  
          private String getDbQualifiedName(AtlasEntity tableEntity) {
              String ret              = null;
              Object tblQualifiedName = tableEntity.getAttribute(ATTRIBUTE_QUALIFIED_NAME);  // dbName.tblName@clusterName
              Object tblName          = tableEntity.getAttribute(ATTRIBUTE_NAME);  // tblName
  
              if (tblQualifiedName != null && tblName != null) {
                  ret = tblQualifiedName.toString().replace("." + tblName + "@", "@"); // dbName@clusterName
              }
  
              return ret;
          }
      }
  
      static class RdbmsTypePreprocessor extends EntityPreprocessor {
          private static final Set<String> entityTypesToMove = new HashSet<>();
  
          protected RdbmsTypePreprocessor(String typeName) {
              super(typeName);
          }
  
          @Override
          public void preprocess(AtlasEntity entity, PreprocessorContext context) {
              if (context.getRdbmsTypesRemoveOwnedRefAttrs()) {
                  clearRefAttributesAndMove(entity, context);
  
                  Map<String, AtlasEntity> referredEntities = context.getReferredEntities();
  
                  if (MapUtils.isNotEmpty(referredEntities)) {
                      for (AtlasEntity referredEntity : referredEntities.values()) {
                          if (entityTypesToMove.contains(referredEntity.getTypeName())) {
                              clearRefAttributesAndMove(referredEntity, context);
                          }
                      }
                  }
              }
          }
  
          private void clearRefAttributesAndMove(AtlasEntity entity, PreprocessorContext context) {
              switch (entity.getTypeName()) {
                  case TYPE_RDBMS_INSTANCE:
                      context.removeRefAttributeAndRegisterToMove(entity, ATTRIBUTE_DATABASES, RELATIONSHIP_TYPE_RDBMS_INSTANCE_DATABASES, ATTRIBUTE_INSTANCE);
                      break;
  
                  case TYPE_RDBMS_DB:
                      context.removeRefAttributeAndRegisterToMove(entity, ATTRIBUTE_TABLES, RELATIONSHIP_TYPE_RDBMS_DB_TABLES, ATTRIBUTE_DB);
                      break;
  
                  case TYPE_RDBMS_TABLE:
                      context.removeRefAttributeAndRegisterToMove(entity, ATTRIBUTE_COLUMNS, RELATIONSHIP_TYPE_RDBMS_TABLE_COLUMNS, ATTRIBUTE_TABLE);
                      context.removeRefAttributeAndRegisterToMove(entity, ATTRIBUTE_INDEXES, RELATIONSHIP_TYPE_RDBMS_TABLE_INDEXES, ATTRIBUTE_TABLE);
                      context.removeRefAttributeAndRegisterToMove(entity, ATTRIBUTE_FOREIGN_KEYS, RELATIONSHIP_TYPE_RDBMS_TABLE_FOREIGN_KEYS, ATTRIBUTE_TABLE);
                      break;
              }
          }
  
          static {
              entityTypesToMove.add(TYPE_RDBMS_DB);
              entityTypesToMove.add(TYPE_RDBMS_TABLE);
              entityTypesToMove.add(TYPE_RDBMS_COLUMN);
              entityTypesToMove.add(TYPE_RDBMS_INDEX);
              entityTypesToMove.add(TYPE_RDBMS_FOREIGN_KEY);
          }
      }
  }
  