| package org.apache.rya.indexing.mongodb.temporal; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.regex.Matcher; |
| |
| import org.apache.rya.api.domain.RyaStatement; |
| import org.apache.rya.indexing.TemporalInstantRfc3339; |
| import org.apache.rya.indexing.TemporalInterval; |
| import org.apache.rya.indexing.mongodb.IndexingMongoDBStorageStrategy; |
| |
| import com.mongodb.BasicDBObject; |
| import com.mongodb.BasicDBObjectBuilder; |
| import com.mongodb.DBCollection; |
| import com.mongodb.DBObject; |
| |
| /** |
| * Defines how time based intervals/instants are stored in MongoDB. |
| * <p> |
| * Time can be stored as the following: |
| * <p>l |
| * <li><b>instant</b> {[statement], instant: TIME}</li> |
| * <li><b>interval</b> {[statement], start: TIME, end: TIME}</li> |
| * @see {@link TemporalInstantRfc3339} for how the dates are formatted. |
| */ |
| public class TemporalMongoDBStorageStrategy extends IndexingMongoDBStorageStrategy { |
| public static final String INTERVAL_START = "start"; |
| public static final String INTERVAL_END = "end"; |
| public static final String INSTANT = "instant"; |
| |
| @Override |
| public void createIndices(final DBCollection coll){ |
| coll.createIndex(INTERVAL_START); |
| coll.createIndex(INTERVAL_END); |
| coll.createIndex(INSTANT); |
| } |
| |
| @Override |
| public DBObject serialize(final RyaStatement ryaStatement) { |
| final BasicDBObject base = (BasicDBObject) super.serialize(ryaStatement); |
| final DBObject time = getTimeValue(ryaStatement.getObject().getData()); |
| base.putAll(time.toMap()); |
| return base; |
| } |
| |
| public DBObject getTimeValue(final String timeData) { |
| final Matcher match = TemporalInstantRfc3339.PATTERN.matcher(timeData); |
| final BasicDBObjectBuilder builder = BasicDBObjectBuilder.start(); |
| if(match.find()) { |
| final TemporalInterval date = TemporalInstantRfc3339.parseInterval(timeData); |
| builder.add(INTERVAL_START, date.getHasBeginning().getAsDateTime().toDate()); |
| builder.add(INTERVAL_END, date.getHasEnd().getAsDateTime().toDate()); |
| } else { |
| builder.add(INSTANT, TemporalInstantRfc3339.FORMATTER.parseDateTime(timeData).toDate()); |
| } |
| return builder.get(); |
| } |
| |
| |
| } |