| /** |
| * 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.store.graph.v1; |
| |
| import org.apache.atlas.AtlasErrorCode; |
| import org.apache.atlas.exception.AtlasBaseException; |
| import org.apache.atlas.model.TypeCategory; |
| import org.apache.atlas.model.instance.AtlasEntity; |
| import org.apache.atlas.repository.graphdb.AtlasVertex; |
| import org.apache.atlas.repository.store.graph.EntityGraphDiscoveryContext; |
| import org.apache.atlas.repository.store.graph.EntityResolver; |
| import org.apache.atlas.type.AtlasEntityType; |
| import org.apache.atlas.type.AtlasTypeRegistry; |
| import org.apache.atlas.type.AtlasTypeUtil; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| public class IDBasedEntityResolver implements EntityResolver { |
| private static final Logger LOG = LoggerFactory.getLogger(IDBasedEntityResolver.class); |
| |
| private final AtlasTypeRegistry typeRegistry; |
| |
| public IDBasedEntityResolver(AtlasTypeRegistry typeRegistry) { |
| this.typeRegistry = typeRegistry; |
| } |
| |
| public EntityGraphDiscoveryContext resolveEntityReferences(EntityGraphDiscoveryContext context) throws AtlasBaseException { |
| if (context == null) { |
| throw new AtlasBaseException(AtlasErrorCode.INTERNAL_ERROR, "IDBasedEntityResolver.resolveEntityReferences(): context is null"); |
| } |
| |
| EntityStream entityStream = context.getEntityStream(); |
| |
| for (String guid : context.getReferencedGuids()) { |
| boolean isAssignedGuid = AtlasTypeUtil.isAssignedGuid(guid); |
| AtlasVertex vertex = isAssignedGuid ? AtlasGraphUtilsV1.findByGuid(guid) : null; |
| |
| if (vertex == null && !(entityStream instanceof EntityImportStream)) { // if not found in the store, look if the entity is present in the stream |
| AtlasEntity entity = entityStream.getByGuid(guid); |
| |
| if (entity != null) { // look for the entity in the store using unique-attributes |
| AtlasEntityType entityType = typeRegistry.getEntityTypeByName(entity.getTypeName()); |
| |
| if (entityType == null) { |
| throw new AtlasBaseException(AtlasErrorCode.TYPE_NAME_INVALID, TypeCategory.ENTITY.name(), entity.getTypeName()); |
| } |
| |
| vertex = AtlasGraphUtilsV1.findByUniqueAttributes(entityType, entity.getAttributes()); |
| } else if (!isAssignedGuid) { // for local-guids, entity must be in the stream |
| throw new AtlasBaseException(AtlasErrorCode.REFERENCED_ENTITY_NOT_FOUND, guid); |
| } |
| } |
| |
| if (vertex != null) { |
| context.addResolvedGuid(guid, vertex); |
| } else { |
| if (isAssignedGuid && !(entityStream instanceof EntityImportStream)) { |
| throw new AtlasBaseException(AtlasErrorCode.REFERENCED_ENTITY_NOT_FOUND, guid); |
| } else { |
| context.addLocalGuidReference(guid); |
| } |
| } |
| } |
| |
| return context; |
| } |
| } |