| /* |
| * 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.commons.utils; |
| |
| import org.apache.iotdb.commons.conf.IoTDBConstant; |
| import org.apache.iotdb.commons.exception.IllegalPathException; |
| import org.apache.iotdb.commons.exception.MetadataException; |
| import org.apache.iotdb.tsfile.common.constant.TsFileConstant; |
| import org.apache.iotdb.tsfile.exception.PathParseException; |
| import org.apache.iotdb.tsfile.read.common.parser.PathNodesGenerator; |
| import org.apache.iotdb.tsfile.read.common.parser.PathVisitor; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class PathUtils { |
| |
| /** |
| * @param path the path will split. ex, root.ln. |
| * @return string array. ex, [root, ln] |
| * @throws IllegalPathException if path isn't correct, the exception will throw |
| */ |
| public static String[] splitPathToDetachedNodes(String path) throws IllegalPathException { |
| if ("".equals(path)) { |
| return new String[] {}; |
| } |
| try { |
| return PathNodesGenerator.splitPathToNodes(path); |
| } catch (PathParseException e) { |
| throw new IllegalPathException(path); |
| } |
| } |
| |
| public static String[] isLegalPath(String path) throws IllegalPathException { |
| try { |
| return PathNodesGenerator.splitPathToNodes(path); |
| } catch (PathParseException e) { |
| throw new IllegalPathException(path); |
| } |
| } |
| |
| /** |
| * check whether measurement is legal according to syntax convention. Measurement can only be a |
| * single node name. The returned list is updated, could be different from the original list. |
| */ |
| public static List<List<String>> checkIsLegalSingleMeasurementListsAndUpdate( |
| List<List<String>> measurementLists) throws MetadataException { |
| if (measurementLists == null) { |
| return null; |
| } |
| // skip checking duplicated measurements |
| Map<String, String> checkedMeasurements = new HashMap<>(); |
| List<List<String>> res = new ArrayList<>(); |
| for (List<String> measurements : measurementLists) { |
| res.add(checkLegalSingleMeasurementsAndSkipDuplicate(measurements, checkedMeasurements)); |
| } |
| return res; |
| } |
| |
| /** |
| * check whether measurement is legal according to syntax convention. Measurement can only be a |
| * single node name, use set to skip checking duplicated measurements |
| */ |
| public static List<String> checkLegalSingleMeasurementsAndSkipDuplicate( |
| List<String> measurements, Map<String, String> checkedMeasurements) throws MetadataException { |
| if (measurements == null) { |
| return null; |
| } |
| List<String> res = new ArrayList<>(); |
| for (String measurement : measurements) { |
| if (measurement == null) { |
| res.add(null); |
| continue; |
| } |
| String checked = checkedMeasurements.get(measurement); |
| if (checked == null) { |
| checked = checkAndReturnSingleMeasurement(measurement); |
| checkedMeasurements.put(measurement, checked); |
| } |
| res.add(checked); |
| } |
| return res; |
| } |
| |
| /** |
| * check whether measurement is legal according to syntax convention. Measurement can only be a |
| * single node name. |
| */ |
| public static List<String> checkIsLegalSingleMeasurementsAndUpdate(List<String> measurements) |
| throws MetadataException { |
| if (measurements == null) { |
| return null; |
| } |
| List<String> res = new ArrayList<>(); |
| for (String measurement : measurements) { |
| if (measurement == null) { |
| continue; |
| } |
| res.add(checkAndReturnSingleMeasurement(measurement)); |
| } |
| return res; |
| } |
| |
| /** |
| * check whether measurement is legal according to syntax convention measurement could be like a.b |
| * (more than one node name), in template? |
| */ |
| public static List<List<String>> checkIsLegalMeasurementListsAndUpdate( |
| List<List<String>> measurementLists) throws IllegalPathException { |
| if (measurementLists == null) { |
| return null; |
| } |
| List<List<String>> res = new ArrayList<>(); |
| for (List<String> measurementList : measurementLists) { |
| res.add(checkIsLegalMeasurementsAndUpdate(measurementList)); |
| } |
| return res; |
| } |
| |
| /** |
| * check whether measurement is legal according to syntax convention measurement could be like a.b |
| * (more than one node name), in template? |
| */ |
| public static List<String> checkIsLegalMeasurementsAndUpdate(List<String> measurements) |
| throws IllegalPathException { |
| if (measurements == null) { |
| return null; |
| } |
| List<String> res = new ArrayList<>(); |
| for (String measurement : measurements) { |
| if (measurement != null) { |
| res.add(PathUtils.isLegalPath(measurement)[0]); |
| } |
| } |
| return res; |
| } |
| |
| /** check a measurement and update it if needed to. for example: `sd` -> sd */ |
| public static String checkAndReturnSingleMeasurement(String measurement) |
| throws IllegalPathException { |
| if (measurement == null) { |
| return null; |
| } |
| if (measurement.startsWith(TsFileConstant.BACK_QUOTE_STRING) |
| && measurement.endsWith(TsFileConstant.BACK_QUOTE_STRING)) { |
| if (checkBackQuotes(measurement.substring(1, measurement.length() - 1))) { |
| return removeBackQuotesIfNecessary(measurement); |
| } else { |
| throw new IllegalPathException(measurement); |
| } |
| } |
| if (IoTDBConstant.reservedWords.contains(measurement.toUpperCase()) |
| || isRealNumber(measurement) |
| || !TsFileConstant.NODE_NAME_PATTERN.matcher(measurement).matches()) { |
| throw new IllegalPathException(measurement); |
| } |
| return measurement; |
| } |
| |
| /** Return true if the str is a real number. Examples: 1.0; +1.0; -1.0; 0011; 011e3; +23e-3 */ |
| public static boolean isRealNumber(String str) { |
| return PathVisitor.isRealNumber(str); |
| } |
| |
| public static boolean isStartWith(String deviceName, String storageGroup) { |
| return deviceName.equals(storageGroup) || deviceName.startsWith(storageGroup + "."); |
| } |
| |
| /** Remove the back quotes of a measurement if necessary */ |
| public static String removeBackQuotesIfNecessary(String measurement) { |
| String unWrapped = measurement.substring(1, measurement.length() - 1); |
| if (PathUtils.isRealNumber(unWrapped) |
| || !TsFileConstant.IDENTIFIER_PATTERN.matcher(unWrapped).matches()) { |
| return measurement; |
| } else { |
| return unWrapped; |
| } |
| } |
| |
| private static boolean checkBackQuotes(String src) { |
| int num = src.length() - src.replace("`", "").length(); |
| if (num % 2 == 1) { |
| return false; |
| } |
| return src.length() == (src.replace("``", "").length() + num); |
| } |
| } |