| /* |
| * 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.flink.tsfile; |
| |
| import org.apache.iotdb.tsfile.common.constant.QueryConstant; |
| import org.apache.iotdb.tsfile.read.common.Field; |
| import org.apache.iotdb.tsfile.read.common.Path; |
| import org.apache.iotdb.tsfile.read.common.RowRecord; |
| |
| import org.apache.flink.api.common.typeinfo.TypeInformation; |
| import org.apache.flink.api.java.typeutils.ResultTypeQueryable; |
| import org.apache.flink.api.java.typeutils.RowTypeInfo; |
| import org.apache.flink.types.Row; |
| |
| import java.util.List; |
| import java.util.stream.Collectors; |
| |
| /** The parser that parses the RowRecord objects read from TsFile into Flink Row object. */ |
| public class RowRowRecordParser implements RowRecordParser<Row>, ResultTypeQueryable<Row> { |
| |
| private final int[] indexMapping; |
| private final RowTypeInfo rowTypeInfo; |
| |
| public RowRowRecordParser(int[] indexMapping, RowTypeInfo rowTypeInfo) { |
| this.indexMapping = indexMapping; |
| this.rowTypeInfo = rowTypeInfo; |
| } |
| |
| @Override |
| public Row parse(RowRecord rowRecord, Row reuse) { |
| List<Field> fields = rowRecord.getFields(); |
| for (int i = 0; i < indexMapping.length; i++) { |
| if (indexMapping[i] < 0) { |
| // The negative index is treated as the marker of timestamp. |
| reuse.setField(i, rowRecord.getTimestamp()); |
| } else { |
| reuse.setField(i, toSqlValue(fields.get(indexMapping[i]))); |
| } |
| } |
| return reuse; |
| } |
| |
| private Object toSqlValue(Field field) { |
| if (field == null) { |
| return null; |
| } else if (field.getDataType() == null) { |
| return null; |
| } else { |
| switch (field.getDataType()) { |
| case BOOLEAN: |
| return field.getBoolV(); |
| case INT32: |
| return field.getIntV(); |
| case INT64: |
| return field.getLongV(); |
| case FLOAT: |
| return field.getFloatV(); |
| case DOUBLE: |
| return field.getDoubleV(); |
| case TEXT: |
| return field.getStringValue(); |
| default: |
| throw new UnsupportedOperationException( |
| String.format("Unsupported type %s", field.getDataType())); |
| } |
| } |
| } |
| |
| @Override |
| public TypeInformation<Row> getProducedType() { |
| return rowTypeInfo; |
| } |
| |
| /** |
| * Creates RowRowRecordParser from output RowTypeInfo and selected series in the RowRecord. The |
| * row field "time" will be used to store the timestamp value. The other row fields store the |
| * values of the same field names of the RowRecord. |
| * |
| * @param outputRowTypeInfo The RowTypeInfo of the output row. |
| * @param selectedSeries The selected series in the RowRecord. |
| * @return The RowRowRecordParser. |
| */ |
| public static RowRowRecordParser create( |
| RowTypeInfo outputRowTypeInfo, List<Path> selectedSeries) { |
| List<String> selectedSeriesNames = |
| selectedSeries.stream().map(Path::toString).collect(Collectors.toList()); |
| String[] rowFieldNames = outputRowTypeInfo.getFieldNames(); |
| int[] indexMapping = new int[outputRowTypeInfo.getArity()]; |
| for (int i = 0; i < outputRowTypeInfo.getArity(); i++) { |
| if (!QueryConstant.RESERVED_TIME.equals(rowFieldNames[i])) { |
| int index = selectedSeriesNames.indexOf(rowFieldNames[i]); |
| if (index >= 0) { |
| indexMapping[i] = index; |
| } else { |
| throw new IllegalArgumentException( |
| rowFieldNames[i] + " is not found in selected series."); |
| } |
| } else { |
| // marked as timestamp field. |
| indexMapping[i] = -1; |
| } |
| } |
| return new RowRowRecordParser(indexMapping, outputRowTypeInfo); |
| } |
| } |