| /** |
| * 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.repository.impexp; |
| |
| import org.apache.atlas.model.instance.AtlasEntity; |
| import org.apache.atlas.model.instance.AtlasRelatedObjectId; |
| import org.apache.atlas.model.typedef.AtlasBaseTypeDef; |
| import org.apache.atlas.model.typedef.AtlasEntityDef; |
| import org.apache.atlas.repository.impexp.ExportService.TraversalDirection; |
| import org.apache.atlas.type.AtlasTypeRegistry; |
| import org.apache.atlas.type.AtlasTypeUtil; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| |
| import static org.apache.atlas.repository.impexp.ExportService.ExportContext; |
| import static org.apache.atlas.repository.impexp.ExportService.TraversalDirection.BOTH; |
| import static org.apache.atlas.repository.impexp.ExportService.TraversalDirection.INWARD; |
| import static org.apache.atlas.repository.impexp.ExportService.TraversalDirection.OUTWARD; |
| import static org.apache.atlas.repository.impexp.ExportService.TraversalDirection.UNKNOWN; |
| |
| public class RelationshipAttributesExtractor implements ExtractStrategy { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(RelationshipAttributesExtractor.class); |
| |
| private final AtlasTypeRegistry typeRegistry; |
| |
| public RelationshipAttributesExtractor(AtlasTypeRegistry typeRegistry) { |
| this.typeRegistry = typeRegistry; |
| } |
| |
| @Override |
| public void fullFetch(AtlasEntity entity, ExportContext context) { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> fullFetch({}): guidsToProcess {}", AtlasTypeUtil.getAtlasObjectId(entity), context.guidsToProcess.size()); |
| } |
| |
| List<AtlasRelatedObjectId> atlasRelatedObjectIdList = getRelatedObjectIds(entity); |
| |
| for (AtlasRelatedObjectId ar : atlasRelatedObjectIdList) { |
| boolean isLineage = isLineageType(ar.getTypeName()); |
| |
| if (context.skipLineage && isLineage) { |
| continue; |
| } |
| context.addToBeProcessed(isLineage, ar.getGuid(), BOTH); |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("<== fullFetch({}): guidsToProcess {}", entity.getGuid(), context.guidsToProcess.size()); |
| } |
| } |
| |
| @Override |
| public void connectedFetch(AtlasEntity entity, ExportContext context) { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> connectedFetch({}): guidsToProcess {}", AtlasTypeUtil.getAtlasObjectId(entity), context.guidsToProcess.size()); |
| } |
| |
| ExportService.TraversalDirection direction = context.guidDirection.get(entity.getGuid()); |
| |
| if (direction == null || direction == UNKNOWN) { |
| addToBeProcessed(entity, context, OUTWARD, INWARD); |
| } else { |
| if (isLineageType(entity.getTypeName())) { |
| direction = OUTWARD; |
| } |
| addToBeProcessed(entity, context, direction); |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> connectedFetch({}): guidsToProcess {}", AtlasTypeUtil.getAtlasObjectId(entity), context.guidsToProcess.size()); |
| } |
| } |
| |
| @Override |
| public void close() { |
| } |
| |
| private void addToBeProcessed(AtlasEntity entity, ExportContext context, TraversalDirection... directions) { |
| if (directions == null || directions.length == 0) { |
| return; |
| } |
| |
| boolean isLineageEntity = isLineageType(entity.getTypeName()); |
| List<AtlasRelatedObjectId> relatedObjectIds = getRelatedObjectIds(entity); |
| |
| for (TraversalDirection direction : directions) { |
| for (AtlasRelatedObjectId id : relatedObjectIds) { |
| String guid = id.getGuid(); |
| TraversalDirection currentDirection = context.guidDirection.get(guid); |
| boolean isLineageId = isLineageType(id.getTypeName()); |
| TraversalDirection edgeDirection = getRelationshipEdgeDirection(id, entity.getTypeName()); |
| |
| if (context.skipLineage && isLineageId) continue; |
| |
| if (!isLineageEntity && direction != edgeDirection || |
| isLineageEntity && direction == edgeDirection) |
| continue; |
| |
| if (currentDirection == null) { |
| context.addToBeProcessed(isLineageId, guid, direction); |
| |
| } else if (currentDirection == OUTWARD && direction == INWARD) { |
| context.guidsProcessed.remove(guid); |
| context.addToBeProcessed(isLineageId, guid, direction); |
| } |
| } |
| } |
| } |
| |
| private TraversalDirection getRelationshipEdgeDirection(AtlasRelatedObjectId relatedObjectId, String entityTypeName) { |
| boolean isOutEdge = typeRegistry.getRelationshipDefByName(relatedObjectId.getRelationshipType()).getEndDef1().getType().equals(entityTypeName); |
| return isOutEdge ? OUTWARD : INWARD; |
| } |
| |
| private boolean isLineageType(String typeName) { |
| AtlasEntityDef entityDef = typeRegistry.getEntityDefByName(typeName); |
| return entityDef.getSuperTypes().contains(AtlasBaseTypeDef.ATLAS_TYPE_PROCESS); |
| } |
| |
| private List<AtlasRelatedObjectId> getRelatedObjectIds(AtlasEntity entity) { |
| List<AtlasRelatedObjectId> relatedObjectIds = new ArrayList<>(); |
| |
| for (Object o : entity.getRelationshipAttributes().values()) { |
| if (o instanceof AtlasRelatedObjectId) { |
| relatedObjectIds.add((AtlasRelatedObjectId) o); |
| } else if (o instanceof Collection) { |
| relatedObjectIds.addAll((List) o); |
| } |
| } |
| return relatedObjectIds; |
| } |
| } |