| /* |
| * 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.session.subscription; |
| |
| import org.apache.iotdb.isession.ISessionDataSet; |
| import org.apache.iotdb.tsfile.exception.write.UnSupportedDataTypeException; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.read.common.Field; |
| import org.apache.iotdb.tsfile.read.common.RowRecord; |
| import org.apache.iotdb.tsfile.utils.Binary; |
| import org.apache.iotdb.tsfile.write.record.Tablet; |
| import org.apache.iotdb.tsfile.write.schema.MeasurementSchema; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.TreeMap; |
| import java.util.stream.Collectors; |
| |
| public class SubscriptionSessionDataSet implements ISessionDataSet { |
| |
| private Tablet tablet; |
| |
| public Tablet getTablet() { |
| return tablet; |
| } |
| |
| public SubscriptionSessionDataSet(Tablet tablet) { |
| this.tablet = tablet; |
| generateRowIterator(); |
| } |
| |
| /////////////////////////////// override /////////////////////////////// |
| |
| private List<String> columnNameList; |
| private List<String> columnTypeList; |
| |
| @Override |
| public List<String> getColumnNames() { |
| if (Objects.nonNull(columnNameList)) { |
| return columnNameList; |
| } |
| |
| columnNameList = new ArrayList<>(); |
| columnNameList.add("Time"); |
| |
| String deviceId = tablet.deviceId; |
| List<MeasurementSchema> schemas = tablet.getSchemas(); |
| columnNameList.addAll( |
| schemas.stream() |
| .map((schema) -> deviceId + "." + schema.getMeasurementId()) |
| .collect(Collectors.toList())); |
| return columnNameList; |
| } |
| |
| @Override |
| public List<String> getColumnTypes() { |
| if (Objects.nonNull(columnTypeList)) { |
| return columnTypeList; |
| } |
| |
| columnTypeList = new ArrayList<>(); |
| columnTypeList.add(TSDataType.INT64.toString()); |
| |
| List<MeasurementSchema> schemas = tablet.getSchemas(); |
| columnTypeList.addAll( |
| schemas.stream().map((schema) -> schema.getType().toString()).collect(Collectors.toList())); |
| return columnTypeList; |
| } |
| |
| public boolean hasNext() { |
| return rowIterator.hasNext(); |
| } |
| |
| @Override |
| public RowRecord next() { |
| Map.Entry<Long, Integer> entry = this.rowIterator.next(); |
| final int columnSize = getColumnSize(); |
| |
| final List<Field> fields = new ArrayList<>(); |
| final long timestamp = entry.getKey(); |
| final int rowIndex = entry.getValue(); |
| |
| for (int columnIndex = 0; columnIndex < columnSize; ++columnIndex) { |
| final Field field; |
| if (tablet.bitMaps[columnIndex].isMarked(rowIndex)) { |
| field = new Field(null); |
| } else { |
| TSDataType dataType = tablet.getSchemas().get(columnIndex).getType(); |
| field = generateFieldFromTabletValue(dataType, tablet.values[columnIndex], rowIndex); |
| } |
| fields.add(field); |
| } |
| return new RowRecord(timestamp, fields); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| // maybe friendly for gc |
| tablet = null; |
| } |
| |
| /////////////////////////////// utility /////////////////////////////// |
| |
| private Iterator<Map.Entry<Long, Integer>> rowIterator; |
| |
| private int getColumnSize() { |
| return tablet.getSchemas().size(); |
| } |
| |
| private void generateRowIterator() { |
| // timestamp -> row index |
| long[] timestamps = tablet.timestamps; |
| TreeMap<Long, Integer> timestampToRowIndex = new TreeMap<>(); |
| final int rowSize = timestamps.length; |
| for (int rowIndex = 0; rowIndex < rowSize; ++rowIndex) { |
| Long timestamp = timestamps[rowIndex]; |
| timestampToRowIndex.put(timestamp, rowIndex); |
| } |
| this.rowIterator = timestampToRowIndex.entrySet().iterator(); |
| } |
| |
| private static Field generateFieldFromTabletValue(TSDataType dataType, Object value, int index) { |
| final Field field = new Field(dataType); |
| switch (dataType) { |
| case BOOLEAN: |
| boolean booleanValue = ((boolean[]) value)[index]; |
| field.setBoolV(booleanValue); |
| break; |
| case INT32: |
| int intValue = ((int[]) value)[index]; |
| field.setIntV(intValue); |
| break; |
| case INT64: |
| long longValue = ((long[]) value)[index]; |
| field.setLongV(longValue); |
| break; |
| case FLOAT: |
| float floatValue = ((float[]) value)[index]; |
| field.setFloatV(floatValue); |
| break; |
| case DOUBLE: |
| double doubleValue = ((double[]) value)[index]; |
| field.setDoubleV(doubleValue); |
| break; |
| case TEXT: |
| Binary binaryValue = new Binary((((Binary[]) value)[index]).getValues()); |
| field.setBinaryV(binaryValue); |
| break; |
| default: |
| throw new UnSupportedDataTypeException( |
| String.format("Data type %s is not supported.", dataType)); |
| } |
| return field; |
| } |
| } |