| /* |
| * 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.rya.indexing.entity.storage.mongo; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| import java.util.List; |
| import java.util.stream.Collectors; |
| |
| import org.apache.rya.api.domain.RyaType; |
| import org.apache.rya.api.domain.RyaIRI; |
| import org.apache.rya.indexing.entity.model.Entity; |
| import org.apache.rya.indexing.entity.model.Property; |
| import org.apache.rya.indexing.entity.storage.mongo.key.MongoDbSafeKey; |
| import org.bson.Document; |
| import org.eclipse.rdf4j.model.impl.SimpleValueFactory; |
| |
| import edu.umd.cs.findbugs.annotations.DefaultAnnotation; |
| import edu.umd.cs.findbugs.annotations.NonNull; |
| |
| /** |
| * Converts between {@link Entity} and {@link Document}. |
| */ |
| @DefaultAnnotation(NonNull.class) |
| public class EntityDocumentConverter implements DocumentConverter<Entity> { |
| |
| public static final String SUBJECT = "_id"; |
| public static final String EXPLICIT_TYPE_IDS = "explicitTypeIds"; |
| public static final String PROPERTIES = "properties"; |
| public static final String VERSION = "version"; |
| public static final String SMART_URI = "smartUri"; |
| |
| private final RyaTypeDocumentConverter ryaTypeConverter = new RyaTypeDocumentConverter(); |
| |
| @Override |
| public Document toDocument(final Entity entity) { |
| requireNonNull(entity); |
| |
| final Document doc = new Document(); |
| doc.append(SUBJECT, entity.getSubject().getData()); |
| |
| doc.append(EXPLICIT_TYPE_IDS, entity.getExplicitTypeIds().stream() |
| .map(explicitTypeId -> explicitTypeId.getData()) |
| .collect(Collectors.toList())); |
| |
| final Document propertiesDoc = new Document(); |
| for(final RyaIRI typeId : entity.getProperties().keySet()) { |
| final Document typePropertiesDoc = new Document(); |
| entity.getProperties().get(typeId) |
| .forEach((propertyNameUri, property) -> { |
| final String propertyName = property.getName().getData(); |
| final String encodedPropertyName = MongoDbSafeKey.encodeKey(propertyName); |
| final RyaType value = property.getValue(); |
| typePropertiesDoc.append(encodedPropertyName, ryaTypeConverter.toDocument(value)); |
| }); |
| propertiesDoc.append(typeId.getData(), typePropertiesDoc); |
| } |
| doc.append(PROPERTIES, propertiesDoc); |
| |
| doc.append(VERSION, entity.getVersion()); |
| |
| doc.append(SMART_URI, entity.getSmartUri().stringValue()); |
| |
| return doc; |
| } |
| |
| @Override |
| public Entity fromDocument(final Document document) throws DocumentConverterException { |
| requireNonNull(document); |
| |
| // Preconditions. |
| if(!document.containsKey(SUBJECT)) { |
| throw new DocumentConverterException("Could not convert document '" + document + |
| "' because its '" + SUBJECT + "' field is missing."); |
| } |
| |
| if(!document.containsKey(EXPLICIT_TYPE_IDS)) { |
| throw new DocumentConverterException("Could not convert document '" + document + |
| "' because its '" + EXPLICIT_TYPE_IDS + "' field is missing."); |
| } |
| |
| if(!document.containsKey(PROPERTIES)) { |
| throw new DocumentConverterException("Could not convert document '" + document + |
| "' because its '" + PROPERTIES + "' field is missing."); |
| } |
| |
| if(!document.containsKey(VERSION)) { |
| throw new DocumentConverterException("Could not convert document '" + document + |
| "' because its '" + VERSION + "' field is missing."); |
| } |
| |
| if(!document.containsKey(SMART_URI)) { |
| throw new DocumentConverterException("Could not convert document '" + document + |
| "' because its '" + SMART_URI + "' field is missing."); |
| } |
| |
| // Perform the conversion. |
| final Entity.Builder builder = Entity.builder() |
| .setSubject( new RyaIRI(document.getString(SUBJECT)) ); |
| |
| ((List<String>)document.get(EXPLICIT_TYPE_IDS)).stream() |
| .forEach(explicitTypeId -> builder.setExplicitType(new RyaIRI(explicitTypeId))); |
| |
| final Document propertiesDoc = (Document) document.get(PROPERTIES); |
| for(final String typeId : propertiesDoc.keySet()) { |
| final Document typePropertiesDoc = (Document) propertiesDoc.get(typeId); |
| for(final String propertyName : typePropertiesDoc.keySet()) { |
| final String decodedPropertyName = MongoDbSafeKey.decodeKey(propertyName); |
| final Document value = (Document) typePropertiesDoc.get(propertyName); |
| final RyaType propertyValue = ryaTypeConverter.fromDocument( value ); |
| builder.setProperty(new RyaIRI(typeId), new Property(new RyaIRI(decodedPropertyName), propertyValue)); |
| } |
| } |
| |
| builder.setVersion( document.getInteger(VERSION) ); |
| |
| builder.setSmartUri( SimpleValueFactory.getInstance().createIRI(document.getString(SMART_URI)) ); |
| |
| return builder.build(); |
| } |
| } |