| /* |
| * 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.isession.template; |
| |
| import org.apache.iotdb.rpc.StatementExecutionException; |
| |
| import org.apache.tsfile.common.constant.TsFileConstant; |
| import org.apache.tsfile.utils.Pair; |
| import org.apache.tsfile.utils.ReadWriteIOUtils; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.ArrayDeque; |
| import java.util.Deque; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * The template instance constructed within session is SUGGESTED to be a flat measurement template, |
| * which has no internal nodes inside a template. |
| * |
| * <p>For example, template(s1, s2, s3) is a flat measurement template, while template2(GPS.x, |
| * GPS.y, s1) is not. |
| * |
| * <p>Tree-structured template, which is contrary to flat measurement template, may not be supported |
| * in further version of IoTDB |
| */ |
| public class Template { |
| private String name; |
| private Map<String, TemplateNode> children; |
| private boolean shareTime; |
| |
| public Template(String name, boolean isShareTime) { |
| this.name = name; |
| this.children = new HashMap<>(); |
| this.shareTime = isShareTime; |
| } |
| |
| public Template(String name) { |
| this(name, false); |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public boolean isShareTime() { |
| return shareTime; |
| } |
| |
| public void setShareTime(boolean shareTime) { |
| this.shareTime = shareTime; |
| } |
| |
| // region Interface to manipulate Template |
| |
| public void addToTemplate(TemplateNode child) throws StatementExecutionException { |
| if (children.containsKey(child.getName())) { |
| throw new StatementExecutionException("Duplicated child of node in template."); |
| } |
| children.put(child.getName(), child); |
| } |
| |
| public void deleteFromTemplate(String name) throws StatementExecutionException { |
| if (children.containsKey(name)) { |
| children.remove(name); |
| } else { |
| throw new StatementExecutionException("It is not a direct child of the template: " + name); |
| } |
| } |
| |
| /** Serialize: templateName[string] isShareTime[boolean] */ |
| @SuppressWarnings("squid:S3776") // ignore Cognitive Complexity of methods should not be too high |
| public void serialize(OutputStream baos) throws IOException { |
| Deque<Pair<String, TemplateNode>> stack = new ArrayDeque<>(); |
| Set<String> alignedPrefix = new HashSet<>(); |
| ReadWriteIOUtils.write(getName(), baos); |
| ReadWriteIOUtils.write(isShareTime(), baos); |
| if (isShareTime()) { |
| alignedPrefix.add(""); |
| } |
| |
| for (TemplateNode child : children.values()) { |
| stack.push(new Pair<>("", child)); |
| } |
| |
| while (!stack.isEmpty()) { |
| Pair<String, TemplateNode> cur = stack.pop(); |
| String prefix = cur.left; |
| TemplateNode curNode = cur.right; |
| StringBuilder fullPath = new StringBuilder(prefix); |
| |
| if (!curNode.isMeasurement()) { |
| if (!"".equals(prefix)) { |
| fullPath.append(TsFileConstant.PATH_SEPARATOR); |
| } |
| fullPath.append(curNode.getName()); |
| if (curNode.isShareTime()) { |
| alignedPrefix.add(fullPath.toString()); |
| } |
| |
| for (TemplateNode child : curNode.getChildren().values()) { |
| stack.push(new Pair<>(fullPath.toString(), child)); |
| } |
| } else { |
| // For each measurement, serialized as: prefixPath, isAlgined, [MeasurementNode] |
| ReadWriteIOUtils.write(prefix, baos); |
| boolean contains = alignedPrefix.contains(prefix); |
| ReadWriteIOUtils.write(contains, baos); |
| curNode.serialize(baos); |
| } |
| } |
| } |
| |
| // endregion |
| |
| } |