| /* |
| * 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.iotdb.tsfile.write.schema; |
| |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.read.common.Path; |
| |
| import java.io.Serializable; |
| import java.util.HashMap; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| |
| /** |
| * The schema of timeseries that exist in this file. The deviceTemplates is a simplified manner to |
| * batch create schema of timeseries. |
| */ |
| public class Schema implements Serializable { |
| |
| /** |
| * Path (device + measurement) -> measurementSchema By default, use the LinkedHashMap to store the |
| * order of insertion |
| */ |
| private Map<Path, IMeasurementSchema> registeredTimeseries; |
| |
| /** template name -> (measurement -> MeasurementSchema) */ |
| private Map<String, Map<String, IMeasurementSchema>> deviceTemplates; |
| |
| public Schema() { |
| this.registeredTimeseries = new LinkedHashMap<>(); |
| } |
| |
| public Schema(Map<Path, IMeasurementSchema> knownSchema) { |
| this.registeredTimeseries = knownSchema; |
| } |
| |
| public void registerTimeseries(Path path, IMeasurementSchema descriptor) { |
| this.registeredTimeseries.put(path, descriptor); |
| } |
| |
| public void registerDeviceTemplate( |
| String templateName, Map<String, IMeasurementSchema> template) { |
| if (deviceTemplates == null) { |
| deviceTemplates = new HashMap<>(); |
| } |
| this.deviceTemplates.put(templateName, template); |
| } |
| |
| public void extendTemplate(String templateName, IMeasurementSchema descriptor) { |
| if (deviceTemplates == null) { |
| deviceTemplates = new HashMap<>(); |
| } |
| Map<String, IMeasurementSchema> template = |
| this.deviceTemplates.getOrDefault(templateName, new HashMap<>()); |
| template.put(descriptor.getMeasurementId(), descriptor); |
| this.deviceTemplates.put(templateName, template); |
| } |
| |
| public void registerDevice(String deviceId, String templateName) { |
| if (!deviceTemplates.containsKey(templateName)) { |
| return; |
| } |
| Map<String, IMeasurementSchema> template = deviceTemplates.get(templateName); |
| for (Map.Entry<String, IMeasurementSchema> entry : template.entrySet()) { |
| Path path = new Path(deviceId, entry.getKey()); |
| registerTimeseries(path, entry.getValue()); |
| } |
| } |
| |
| public IMeasurementSchema getSeriesSchema(Path path) { |
| return registeredTimeseries.get(path); |
| } |
| |
| public TSDataType getTimeseriesDataType(Path path) { |
| if (!registeredTimeseries.containsKey(path)) { |
| return null; |
| } |
| return registeredTimeseries.get(path).getType(); |
| } |
| |
| public Map<String, Map<String, IMeasurementSchema>> getDeviceTemplates() { |
| return deviceTemplates; |
| } |
| |
| /** check if this schema contains a measurement named measurementId. */ |
| public boolean containsTimeseries(Path path) { |
| return registeredTimeseries.containsKey(path); |
| } |
| |
| // for test |
| public Map<Path, IMeasurementSchema> getRegisteredTimeseriesMap() { |
| return registeredTimeseries; |
| } |
| } |