| /* |
| * 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.hive; |
| |
| import org.apache.iotdb.hadoop.tsfile.record.HDFSTSRecord; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hive.common.StringInternUtils; |
| import org.apache.hadoop.hive.serde.serdeConstants; |
| import org.apache.hadoop.hive.serde2.AbstractSerDe; |
| import org.apache.hadoop.hive.serde2.SerDeException; |
| import org.apache.hadoop.hive.serde2.SerDeStats; |
| import org.apache.hadoop.hive.serde2.SerDeUtils; |
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector; |
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory; |
| import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory; |
| import org.apache.hadoop.hive.serde2.typeinfo.PrimitiveTypeInfo; |
| import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo; |
| import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoUtils; |
| import org.apache.hadoop.io.Writable; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.annotation.Nullable; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Properties; |
| |
| import static org.apache.iotdb.hadoop.tsfile.TSFInputFormat.READ_DELTAOBJECTS; |
| import static org.apache.iotdb.hadoop.tsfile.TSFInputFormat.READ_MEASUREMENTID; |
| |
| public class TsFileSerDe extends AbstractSerDe { |
| |
| private static final Logger logger = LoggerFactory.getLogger(TsFileSerDe.class); |
| |
| public static final String DEVICE_ID = "device_id"; |
| |
| private List<String> columnNames; |
| private List<TypeInfo> columnTypes; |
| private TsFileDeserializer tsFileDeserializer = null; |
| private ObjectInspector oi; |
| private String deviceId; |
| |
| @Override |
| public void initialize(@Nullable Configuration conf, Properties tbl) throws SerDeException { |
| |
| final String columnNameProperty = tbl.getProperty(serdeConstants.LIST_COLUMNS); |
| final String columnTypeProperty = tbl.getProperty(serdeConstants.LIST_COLUMN_TYPES); |
| final String columnNameDelimiter = |
| tbl.containsKey(serdeConstants.COLUMN_NAME_DELIMITER) |
| ? tbl.getProperty(serdeConstants.COLUMN_NAME_DELIMITER) |
| : String.valueOf(SerDeUtils.COMMA); |
| |
| deviceId = tbl.getProperty(DEVICE_ID); |
| |
| if (columnNameProperty == null |
| || columnNameProperty.isEmpty() |
| || columnTypeProperty == null |
| || columnTypeProperty.isEmpty()) { |
| columnNames = Collections.emptyList(); |
| columnTypes = Collections.emptyList(); |
| } else { |
| columnNames = |
| StringInternUtils.internStringsInList( |
| Arrays.asList(columnNameProperty.split(columnNameDelimiter))); |
| columnTypes = TypeInfoUtils.getTypeInfosFromTypeString(columnTypeProperty); |
| } |
| |
| // Check column and types equals |
| if (columnTypes.size() != columnNames.size()) { |
| throw new TsFileSerDeException("len(columnNames) != len(columnTypes)"); |
| } |
| |
| if (conf != null) { |
| conf.set(READ_DELTAOBJECTS, deviceId); |
| conf.set(READ_MEASUREMENTID, columnNames.get(1)); |
| } |
| |
| oi = createObjectInspector(); |
| } |
| |
| @Override |
| public Class<? extends Writable> getSerializedClass() { |
| // Not support yet |
| return HDFSTSRecord.class; |
| } |
| |
| @Override |
| public Writable serialize(Object obj, ObjectInspector objInspector) { |
| // Not support yet |
| return null; |
| } |
| |
| @Override |
| public SerDeStats getSerDeStats() { |
| // Not support yet |
| return null; |
| } |
| |
| @Override |
| public Object deserialize(Writable blob) throws SerDeException { |
| return getDeserializer().deserialize(columnNames, columnTypes, blob, deviceId); |
| } |
| |
| @Override |
| public ObjectInspector getObjectInspector() { |
| return oi; |
| } |
| |
| private ObjectInspector createObjectInspector() throws TsFileSerDeException { |
| List<ObjectInspector> columnOIs = new ArrayList<>(columnNames.size()); |
| |
| // At this point we've verified the types are correct. |
| for (int i = 0; i < columnNames.size(); i++) { |
| columnOIs.add(i, createObjectInspectorWorker(columnTypes.get(i))); |
| } |
| return ObjectInspectorFactory.getStandardStructObjectInspector(columnNames, columnOIs); |
| } |
| |
| private ObjectInspector createObjectInspectorWorker(TypeInfo ti) throws TsFileSerDeException { |
| if (!supportedCategories(ti)) { |
| throw new TsFileSerDeException("Don't yet support this type: " + ti); |
| } |
| ObjectInspector result; |
| switch (ti.getCategory()) { |
| case PRIMITIVE: |
| PrimitiveTypeInfo pti = (PrimitiveTypeInfo) ti; |
| result = PrimitiveObjectInspectorFactory.getPrimitiveJavaObjectInspector(pti); |
| break; |
| // these types is not supported in TsFile |
| case LIST: |
| case MAP: |
| case STRUCT: |
| case UNION: |
| throw new TsFileSerDeException("The type is not supported in TsFile: " + ti); |
| default: |
| throw new TsFileSerDeException("No Hive categories matched: " + ti); |
| } |
| return result; |
| } |
| |
| private boolean supportedCategories(TypeInfo ti) { |
| final ObjectInspector.Category c = ti.getCategory(); |
| return c.equals(ObjectInspector.Category.PRIMITIVE); |
| } |
| |
| private TsFileDeserializer getDeserializer() { |
| if (tsFileDeserializer == null) { |
| tsFileDeserializer = new TsFileDeserializer(); |
| } |
| |
| return tsFileDeserializer; |
| } |
| } |